Fungi growth resistant facing and insulation assembly

Abstract

The facing of a faced building insulation assembly includes a central field portion that is fungi growth resistant. The facing, as part of an insulation assembly, is fungi growth-resistant, may be perforated to provide a selected water vapor permeance, and may include a bonding layer such as a heat activated bonding layer, that bonds the facing to an insulation layer of the assembly. The facing may be tabless or have tabs.

Description

BACKGROUND OF THE INVENTION

[0002] The subject invention relates to fungi growth resistant facings for faced building insulation assemblies, such as but not limited to those insulation assemblies commonly used to insulate homes and other residential building structures; offices, stores and other commercial building structures; and industrial building structures, and to the faced building insulation assemblies faced with such facings. The facings of the subject invention, as applied to the insulation layers of the faced insulation assemblies of the subject invention, are designed to exhibit improved fungi growth-inhibiting characteristics and may also exhibit improved aesthetics and other improved performance characteristics, such as but not limited to water vapor permeance rating designed for particular applications, and improved functionality to improve installer productivity.

[0003] Building insulation assemblies currently used to insulate buildings, especially fiberglass building insulations, are commonly faced with kraft paper facings, such as 30-40 lbs/3 MSF (30 to 40 pounds/3000 square feet) natural kraft paper. In addition, U.S. Pat. Nos. 5,733,624; 5,746,854; 6,191,057; and 6,357,504 disclose examples of polymeric facings for use in faced building insulation assemblies and US patent application nos. US 2002/0179265 A1; US 2002/0182964 A1; and US 2002/0182965 A1 disclose examples of polymeric-kraft laminates for use in faced building insulation assemblies.

[0004] While building insulation assemblies faced with such kraft paper facings function quite well, have been used for decades, and the patents listed above disclose kraft paper facing materials as well as alternative facing materials, there has remained a need for facings with improved performance characteristics. The improved facings of the subject invention and the building insulation assemblies faced with the improved facings of the subject invention provide faced insulation assemblies, designed to exhibit improved fungi growth-inhibiting characteristics, that are especially well suited for applications where the insulation assemblies will be subjected to hot humid conditions. The facings of the subject invention may also exhibit improved pest control characteristics, exhibit improved performance characteristics (e.g. reduced flame spread, reduced smoke development and/or improved water vapor permeance rating), and/or enable improved installer productivity or other cost savings.

SUMMARY OF THE INVENTION

[0005] The facing of a faced building insulation assembly of the subject invention includes a central field portion having one or more polymeric film layers, spunbond continuous polymeric filament mat layers; polymeric fiber mat layers, fiberglass mat layers, paper layers, paper and foil and/or scrim layers, or combinations thereof. The facing is a fungi growth resistant facing as defined herein that, preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth as defined herein and more preferably, exhibits no sporulating growth or non-sporulating growth as defined herein.

[0006] When a surface of a specimen of a facing sheet material of the subject invention or a facing of the subject invention, as bonded to an insulation layer of a faced insulation assembly of the subject invention, and a surface of a comparative specimen of a white birch or southern yellow pine wood, which are each approximately 0.75 by 6 inches (20 by 150 mm), are tested as follows, the specimen of facing sheet material or facing of the subject invention will have less spore growth than the comparative specimen of white birch or southern yellow pine. Spore suspensions of aspergillus niger, aspergillus versicolor, penicillium funiculosum, chaetomium globosum, and asperguillus flavus are prepared that each contain 1,000,000±200,000 spores per mL as determined with a counting chamber. Equal volumes of each of the spore suspensions are blended together to produce a mixed spore suspension. The 0.75 by 6 inch surface of the specimen of the facing sheet material or facing of the subject invention and the 0.75 by 6 inch surface of the comparative specimen of white birch or southern yellow pine wood are each inoculated with approximately 0.50 mL of the mixed spore suspension by spaying the surfaces with a fine mist from a chromatography atomizer capable of providing 100,000±20,000 spores/inch2. The specimens are immediately placed in an environmental chamber and maintained at a temperature of 86±4° F. (30±2° C.) and 95±4% relative humidity for a minimum period of 28 days±8 hours from the time incubation commenced (the incubation period). At the end of the incubation period, the specimens are examined at 40× magnification. The specimen of the facing sheet material or facing of the subject invention passes the test provided the specimen of the facing sheet material or facing has less spore growth than the comparative specimen of white birch or southern yellow pine wood. As used in this specification and claims the term “fungi growth resistant” means the observable spore growth at a 40× magnification on the surface of the facing sheet material or facing specimen being tested is less than the observable spore growth at a 40× magnification on either a white birch or southern yellow pine comparative specimen when the specimens are tested as set forth in this paragraph.

[0007] When a surface of a 50-mm by 50-mm specimen or 50-mm diameter specimen of a facing sheet material of the subject invention or a facing of the subject invention, as bonded to an insulation layer of the subject invention, has been tested as follows, the specimen will preferably, exhibit only microscopicaily observable traces of sporulating growth, non-sporulating growth or both sporulating and non-sporulating growth and, more preferably, exhibit no microscopically observable sporulating growth or non-sporulating growth. Separate spore suspensions of aspergillus niger, penicillium pinophilum, chaetomium globosum, gliocladium virens, and aureobasidium pullulans are prepared with a sterile nutrient-salts solution. The spore suspensions each contain 1,000,000±200,000 spores per mL as determined with a counting chamber. Equal volumes of each of the spore suspensions are blended together to produce a mixed spore suspension. A solidified nutrient-salts agar layer from 3 to 6 mm (⅛ to ¼ inch) is provided in a sterile dish and the specimen is placed on the surface of the agar. The entire exposed surface of the specimen is inoculated and moistened with the mixed spore suspension by spraying the suspension from a sterilized atomizer with 110 kPa (16 psi) of air pressure. The specimen is covered and incubated at 28 to 30° C. (82 to 86° F.) in an atmosphere of not less than 85% relative humidity for 28 days. The surface of the specimen is then microscopically observed to visually examine for sporulating and/or non-sporulating growth. The magnification used for making the microscopic observations to determine both sporulating growth and non-sporulating growth is selected to enable non-sporulating growth to be observed. As used in this specification and claims the term “traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth” means a microscopically observable sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth of the mixed spore suspension on the surface of the specimen being tested when the specimen is tested under the conditions set forth in this paragraph that, at the conclusion of 28 days, cover(s) less than 10% of the surface area of the surface of the specimen being tested. As used in this specification and claims the term “no sporulating growth or non-sporulating growth” means no observable sporulating growth or non-sporulating growth of the mixed spore suspension on the surface of the specimen being tested at the conclusion of 28 days when the specimen is tested under the conditions set forth in this paragraph.

[0008] To achieve the desired fungi growth resistance, the facing of the subject invention may include one or more fungi growth-inhibiting agents. The facing also: may include a pesticide; may be modified to provide the facing with a selected water vapor permeance, e.g. may be perforated to provide the facing with a selected water vapor permeance, and/or may include a heat activated bonding layer that bonds the facing to the insulation layer of the assembly. As used in this specification and claims the term “bonding layer” includes both an adhesive layer that does not require heat activation such as but not limited to a conventional pressure sensitive adhesive in the form of a coating, a spray on, a spray on fiberized adhesive, or other types of continuous or discontinuous adhesive layers, and a heat activated adhesive layer such as but not limited to an asphalt or modified-asphalt coating layer (hereinafter “asphalt coating layer”), a wax coating layer, a polymeric film, a polymeric coating, a polymeric fiber mat, a polymeric fiber mesh, a spray on adhesive, a spray on particulate or fiberized adhesive, or other continuous or discontinuous heat activated adhesive layers having a softening point temperature sufficiently low to enable the heat activated adhesive layer to be heated to a temperature to effect a bond between the facing and a major surface of the insulation layer without negatively impacting the physical properties or visual appearance of the facing or otherwise degrading the facing. The bonding layer may be pre-applied to the facing or applied to the facing and/or major surface of the insulation layer at the point where the facing and the insulation layer are being combined. With respect to the polymeric heat activated bonding layers used to bond the facing of the subject invention to an insulation layer, polypropylene and polyethylene are preferred polymers for use as the heat activated bonding layer. The bonding layer used to bond a facing of the subject invention to an insulation layer may be used to increase the water repellency of the facing and make the facing less susceptible to fungi growth by reducing the presence of moisture in the insulation assembly. In addition, the bonding layer may be used to reduce the water vapor permeance rating of selected facings of the subject invention. The bonding layer used to bond the facing of the subject invention to an insulation layer may also include one or more fungi-growth inhibiting agents.

[0009] As used in this specification and claims, the term “laminate” means two or more layers of one or more materials that are superposed and united.

[0010] The facing of the subject invention may have lateral tabs, may be tabless, or may have lateral tabs made from a sheet material that differs from the sheet material of the central field portion of the facing. The facing may have a central field portion that is sufficiently transparent to enable the insulation layer of an insulation assembly to be seen through the facing. The facing may have lateral tabs sufficiently transparent to enable framing members to be seen through the tabs, sufficiently open to enable wallboard to be directly bonded to framing members overlaid by the tabs, and/or sufficiently greater in integrity than the field portion of the facing to permit a less expensive material to be used for the field portion of the facing. The field portion of the facing may include a mineral coating (e.g. clay coating) including modifiers or polymeric coating or film including modifiers to stiffen the facing, inhibit fungi growth, treat or control pests, and/or decrease the flame spread and smoke formation characteristics of the facing.

[0011] The facings of the subject invention may be formed from gusseted tubular sheet materials. The facings of the subject invention may be separable longitudinally at spaced apart locations in the central field portions of the facings so that the facings can be applied to pre-cut longitudinally separable insulation layers and separated where the pre-cut longitudinally separable insulation layers are separable. The building insulation assemblies of the subject invention may have laterally compressible resilient insulation layers faced with facings having portions, e.g. lateral edge portions, which are or which may be separated from the insulation layers when the insulation layers are laterally compressed to form tabs. The building insulation assemblies of this paragraph may utilize any of the facing materials of the subject invention.

[0012] The fungi growth resistant sheet materials of the subject invention, typically in widths of about four feet or more, may be applied as vapor retarders directly to the framing members of a wall where unfaced insulation is used to insulate the wall cavities.

[0013] The faced insulation assembly of the subject invention may include an insulation assembly with a facing of the subject invention and at least one reflective sheet that radiates heat, such as but not limited to a foil sheet, a metallized film, or other metallized sheet material.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a schematic perspective view of a first embodiment of the faced insulation assembly of the subject invention.

[0015] FIG. 2 is a schematic end view of the faced insulation assembly of FIG. 1.

[0016] FIG. 3 is a schematic view of the circled portion of FIG. 2 on a larger scale than FIG. 2.

[0017] FIGS. 4 and 5 are schematic views of faced insulation assemblies of FIGS. 1 to 3 installed in a wall cavity.

[0018] FIG. 6 is partial schematic view of another embodiment of the faced insulation assembly of the subject invention showing a tab strip bonded to one of the tabs of the facing of FIGS. 1 to 3.

[0019] FIG. 7 is a schematic transverse cross section though a tubular sheet material with lateral gussets that can be made into a facing of the subject invention.

[0020] FIG. 8 is a schematic transverse cross section through the tubular sheet material of FIG. 7 after the tubular sheet material has been collapsed and bonded together.

[0021] FIGS. 9 to 12 are partial schematic views of embodiments of the faced insulation assembly of the subject invention showing other tabs that may be substituted for the tabs shown on the facing of FIGS. 1 to 3. The partial schematic views of FIGS. 9 to 12 correspond to the view of FIG. 3 for the embodiment of FIGS. 1 to 3.

[0022] FIG. 13 is a schematic end view of a faced pre-cut insulation assembly with a facing of the subject invention that is longitudinally separable at each location where the insulation layer is longitudinally separable.

[0023] FIG. 14 is a schematic end view of a faced pre-cut insulation assembly with a facing of the subject invention that is longitudinally separable at each location where the insulation layer is longitudinally separable and provided with tabs at each location where the insulation layer is separable.

[0024] FIG. 15 is schematic view of the circled portion of FIG. 14 on a larger scale than FIG. 14.

[0025] FIG. 16 is a schematic end view of a faced insulation assembly of the subject invention where the facing is without preformed tabs.

[0026] FIG. 17 is a schematic view of the circled portion of FIG. 16 on a larger scale than FIG. 16.

[0027] FIG. 18 is a schematic view of a modified version of the circled portion of FIG. 16 on a larger scale than FIG. 16.

[0028] FIG. 19 is a schematic end view of a faced pre-cut insulation assembly with a facing of the subject invention that has no preformed tabs and is longitudinally separable at each location where the insulation layer is longitudinally separable.

[0029] FIG. 20 is a schematic view of the circled portion of FIG. 19 on a larger scale than FIG. 19.

[0030] FIG. 21 is a schematic view of a modified version of the circled portion of FIG. 19 on a larger scale than FIG. 19.

[0031] FIG. 22 is a schematic view of a reflective insulation made with the fungi growth resistant kraft paper facings of the subject invention.

[0032] FIGS. 23 and 24 are partial elevations of walls insulated with unfaced insulation batts that are overlaid by any of the first through the fifth sheet materials of the subject invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] FIGS. 1 and 2 show a typical faced insulation assembly 20 of the subject invention. The faced insulation assembly 20 includes a facing 22 of the subject invention and an insulation layer 24. The insulation layer 24 has first and second major surfaces 26 and 28, which are defined by the length and width of the insulation layer, and a thickness. The facing 22 of the faced insulation assembly 20 is formed of a sheet material that has a central field portion 32 and a pair of lateral tabs 34 that are typically between 0.25 and 1.5 inches in width. The lateral tabs 34 can be unfolded and extended beyond the lateral surfaces of the insulation layer 24 of the faced insulation assembly 20 (typically extended between 0.25 and 1.5 inches beyond the lateral surfaces of the insulation layer) to overlap the framing members forming a cavity being insulated by the faced insulation assembly and/or for attachment to framing members forming a cavity being insulated by the faced insulation assembly. The central field portion 32 of the sheet has a first outer major surface and a second inner major surface. The central field portion 32 of the sheet overlays and is bonded, typically by a bonding layer 36 on the inner major surface of central field portion 32 of the sheet, to the major surface 26 of the insulation layer 24.

[0034] FIGS. 4 and 5 show faced insulation assemblies 20 installed in a wall cavity defined on three sides by two spaced apart framing members 38 (e.g. wooden b 2×4 or 2×6 studs) and a sheet of sheathing 40. As shown in FIG. 4, the tabs 34 of the faced insulation assemblies 20 are secured to the end surfaces of the framing members 38 by staples 42. While the insulation assemblies 20 are shown installed in wall cavities, the insulation assemblies 20 may also be installed between framing members in other building cavities such as but not limited to ceiling, floor, and roof cavities. While, as shown, the tabs 34 are stapled to the end surfaces of the faming members 38, the tabs may be stapled to the side surfaces of the framing members 38, may be bonded to the end surfaces of the framing members 38 or the side surfaces of the framing members 38, may overlap end surfaces of the framing members 38 without being secured to the framing members, or, if desired, may be left in their initial folded configuration.

[0035] FIG. 6 shows a partial cross section of the facing 22 of FIGS. 1 to 3 that corresponds to FIG. 3 wherein the lateral tabs 34 include tab strips 44. The lateral tabs 34 each have a tab strip 44 that overlays, is coextensive or essentially coextensive with, and is bonded to one surface of the lateral tab 34. The tab strips 44 provide the lateral tabs 34 with increased integrity relative to central field portion 32 of the facing sheet 22 for handling and stapling and may be selected to have sufficient integrity to enable the use of thinner and/or less expensive sheet materials for the facing sheet 22. In addition, the tab strips 44 may also function as release liners overlaying layers or coatings 46 of pressure-sensitive adhesives on the lateral tabs 34 that may be used to secure the lateral tabs 34 to framing members 38.

[0036] While the insulation layers faced with the facings of the subject invention may be made of other materials, such as but not limited to foam insulation materials, preferably, the insulation layers of the insulation assemblies of the subject invention are resilient fibrous insulation blankets and, preferably, the faced conventional uncut resilient fibrous insulation blankets and the faced pre-cut resilient fibrous insulation blankets of the subject invention are made of randomly oriented, entangled, glass fibers and typically have a density between about 0.3 pounds/ft3 and about 1.6 pounds/ft3. Examples of fibers other than glass fibers that may be used with or in place of glass fibers to form the faced resilient insulation blankets of the subject invention are mineral fibers, such as but not limited to, rock wool fibers, slag fibers, and basalt fibers; organic fibers such as but not limited to polypropylene, polyester and other polymeric fibers; natural fibers such as but not limited to cellulose, wood, flax and cotton fibers; and combinations thereof. The fibers in the faced resilient insulation blankets of the subject invention may be bonded together at their points of intersection for increased integrity, e.g. by a binder such as but not limited to polycarboxy polymers, polyacrylic acid polymers, urea phenol formaldehyde or other suitable bonding materials, or the faced resilient fibrous insulation blankets of the subject invention may be binder-less provided the blankets possess the required integrity and resilience.

[0037] While the faced resilient fibrous insulation blankets of the subject invention may be in roll form (typically in excess of 117 inches in length), for most applications, such as the insulation of walls in homes and other residential structures, the faced resilient fibrous insulation blankets of the subject invention are in the form of batts about 46 to about 59 inches in length (typically about 48 inches in length) or 88 to about 117 inches in length (typically about 93 inches in length). Typically, the widths of the faced resilient fibrous insulation blankets are substantially equal to or somewhat greater than standard cavity width of the cavities to be insulated, for example: about 15 to about 15½ inches in width (a nominal width of 15 inches) for a cavity where the center to center spacing of the wall, floor, ceiling or roof framing members is about 16 inches (the cavity having a width of about 14½ inches); and about 23 to about 23½ inches in width (a nominal width of 23 inches) for a cavity where the center to center spacing of the wall, floor, ceiling or roof framing members is about 24 inches (the cavity having a width of about 22½ inches). However, for other applications, the faced resilient fibrous insulation blankets may have different initial widths determined by the standard widths of the cavities to be insulated by the insulation blankets.

[0038] The amount of thermal resistance or sound control desired and the depth of the cavities being insulated by the faced insulation assemblies determine the thicknesses of the faced insulation assemblies of the subject invention, e.g. faced resilient fibrous insulation blankets. Typically, the faced insulation assemblies are about three to about ten or more inches in thickness and approximate the depth of the cavities being insulated. For example, in a wall cavity defined in part by nominally 2×4 or 2×6 inch studs or framing members, a faced pre-cut resilient fibrous insulation blanket will have a thickness of about 3½ inches or about 5½ inches, respectively.

[0039] A first sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the facings of the other faced insulation assemblies of the subject invention is a synthetic paper-like polymeric film, e.g. an extruded, coextruded, or blown synthetic filled polyethylene or polypropylene paper film, between 0.5 and 3 mils in thickness. The first sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. The first sheet material may include a fungi growth-inhibiting agent and preferably, has substantially the same color as the insulation layer of the faced insulation assembly, e.g. insulation layer 24 of the faced insulation assembly 20. An example of such a film is a white paper-like polymeric film available from Vanguard Plastics, Incorporated of Dallas, Tex. This film is a 1.25 mil thick film that is coextruded in three layers with the two surface film layers each being a Papermatch® mineral filled resin film layer about 0.25 mil thick and the middle film layer being a clear HDPE resin film layer. Preferably, such a white film would be used to face an insulation layer that is white in color such as a white, formaldehyde free, fiberglass insulation. The first sheet material may also have an inner heat activated bonding layer, such as but not limited to a polymeric film layer, a polymeric coating layer, or a polymeric particulate or fiberized layer, on the inner major surface of the first sheet material with a relatively low temperature softening point when compared to the softening point temperature of the other polymeric film layer of the sheet material (e.g. a softening point temperature that is lower by about 60° F. or more) whereby the inner polymeric film or coating layer can be used as a heat activated adhesive to bond the facing to the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing. For example, the inner polymeric film or coating layer could have a softening point temperature of 190° F. or less while the other polymeric film layer has a softening point temperature of 250° F. or more

[0040] A second sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the facings of the other faced insulation assemblies of the subject invention is a transparent polymeric film or a translucent polymeric film. The second sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. The second sheet material may include a fungi growth-inhibiting agent and is sufficiently clear to enable both the insulation layer of the faced insulation assembly to be seen through the central field portion of the facing and the framing members to be seen through the lateral tabs of the facing. The ability to see the insulation layer of the insulation assembly through the central field portion of the facing and the framing members through the tabs of the facing will enable the installers to more easily locate the framing members for securing wallboard to the framing members after the tabs of the faced insulation assembly have overlapped or overlapped and been secured to end surfaces of the framing members. A company logo can be embossed into, printed onto, or watermarked onto this polymeric film sheet material.

[0041] This second sheet material may be a laminate including two or more layers of polymeric film that are bonded together and sufficiently clear to be seen through and enable both the insulation layer of the faced insulation assembly to be seen through the central field portion of the facing and framing members to be seen through the lateral tabs of the facing. Where the second sheet material is a laminate, a company logo can be watermarked onto the second sheet material by locating the watermark in the central field portion of the facing on one of the opposed surfaces the two outermost polymeric film layers of the laminate. Transparent or translucent polymeric films that may be used as the second sheet materials are polymeric films such as but not limited to transparent or translucent low density polyethylene films (LDPE films), transparent or translucent high density polyethylene films (HDPE), transparent or translucent polypropylene films (PP films) or combinations thereof. Where the second sheet material is a polymeric film laminate, the polymeric film layers may be cast or coextruded to form the laminate or heat welded or otherwise bonded together.

[0042] Where the second sheet material is a polymeric film laminate, the second sheet material can be strengthened by using stretched polymeric film layers that are cross-laminated. By a process known as stretching, the polymer chains in a polymeric film layer can be realigned to provide the polymeric film layer with a tear strength in a first direction that is greater than the initial tear strength of the polymeric film layer and greater than the tear strength of the polymeric film layer in a second direction perpendicular to the first direction. Two of these stretched polymeric film layers can be laminated together with the films oriented so that the direction of greater tear strength for the first polymeric film layer is perpendicular to the direction of greater tear strength for the second polymeric film layer. The additional tear strength provided the facing with such a laminate structure will provide the tabs of the facing with greater tear strength for handling and help prevent staple pull through when the tabs are secured to framing members by staples.

[0043] While a preferred form of the second sheet material is transparent or translucent, it is also contemplated the one polymeric film layer or one or more of the polymeric film layers in the laminate forming the second sheet material can be colored. A preferred color for a facing used in a faced insulation assembly with a white insulation layer, such as a white, formaldehyde free, fiberglass insulation layer, is white. The second sheet material may also have an inner heat activated bonding layer, such as but not limited to a polymeric film, a polymeric coating layer, or a polymeric particulate or fiberized layer, on the inner major surface of the first sheet material with a relatively low temperature softening point when compared to the softening point temperature of the other polymeric film layer(s) of the sheet material (e.g. a softening point temperature that is lower by about 60° F. or more) whereby the inner polymeric film or coating layer can be used as a heat activated adhesive to bond the facing to the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing. For example, the inner polymeric film or coating layer could have a softening point temperature of 190° F. or less while the other polymeric film layer(s) have softening point temperatures of 250° F. or more. Preferably, where the second sheet material is transparent or translucent, the heat activated bonding layer would also be sufficiently transparent or translucent to enable the insulation layer can be seen through the facing and bonding layer.

[0044] A third sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the facings of the other faced insulation assemblies of the subject invention is a mineral coated (e.g. clay coated) thin polymeric film laminate with a fungi growth inhibiting agent that may be used rather than a more expensive uncoated polymeric film. The third sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. The laminate of the third sheet material includes a thin and/or less expensive polymeric film layer, e.g. a polymeric film layer about 1 mil or less in thickness, and a mineral coating layer e.g. a clay coating layer. The mineral coating layer forms the outer layer and the outer major surface of the third sheet material. At a relatively low cost, the mineral coating layer increases the stiffness and body of the third sheet material, the integrity of the third sheet material, the “cuttability” of the third sheet material, the “cuffability” (ability of the third sheet material to hold a fold when forming tabs), and the fire resistance of the third sheet material. The mineral coating can also include other performance enhancing characteristics to improve the overall performance of the faced insulation assembly. For example, the mineral coating can include a pesticide (e.g. an insecticide, a termiticide), a desired coloration, etc. The mineral coating may be paint. Polymeric films that may be used in the laminate of the third sheet material are polymeric films such as but not limited to low density polyethylene films (LDPE films), high density polyethylene films (HDPE), polypropylene films (PP films), films with substantially the same performance characteristics as the polyethylene and polypropylene films, and/or combinations thereof. The third sheet material may also have an inner heat activated bonding layer, such as but not limited to a polymeric film layer, a polymeric coating layer, or a polymeric particulate or fiberized layer, on the inner major surface of the first sheet material with a relatively low temperature softening point when compared to the softening point temperature of the other polymeric film layer of the sheet material (e.g. a softening point temperature that is lower by about 60° F. or more) whereby the inner polymeric film or coating layer can be used as a heat activated adhesive to bond the facing to the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing. For example, the inner polymeric film or coating layer could have a softening point temperature of 190° F. or less while the other polymeric film layer has softening point temperatures of 250° F. or more.

[0045] A fourth sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the other facings of the faced insulation assemblies of the subject invention is a mineral coated thin lightweight kraft paper laminate (e.g. a clay coated 20-30 or 30-40 lbs/3 MSF kraft paper laminate) that may be used rather than a 35-38 lbs/3 MSF extensible natural kraft commonly used to face fiberglass insulation assemblies. The fourth sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. The laminate of the fourth sheet material includes a lightweight and less expensive kraft paper layer, a mineral coating layer (e.g. clay coating layer) and a fungi growth-inhibiting agent. The mineral coating layer forms the outer layer and the outer major surface of the fourth sheet material. At a relatively low cost, the mineral coating layer increases the stiffness and body of the fourth sheet material, the integrity of the fourth sheet material, the “cuttability” of the fourth sheet material, the “cuffability” (ability of the fourth sheet material to hold a fold when forming tabs), and the fire resistance of the fourth sheet material. The mineral coating can also provide the facing with other performance enhancing characteristics to improve the overall performance of the faced insulation assemblies of the subject invention. For example, the mineral coating can include a pesticide (e.g. an insecticide, a termiticide), a desired coloration, etc. The mineral coating may be paint. The fourth sheet material may also have an inner heat activated bonding layer, such as but not limited to a polymeric film layer, a polymeric coating layer, or a polymeric particulate or fiberized layer, on the inner major surface of the lightweight kraft paper layer with a low temperature softening point, e.g. a softening point of less than 225° F. whereby the inner polymeric film or coating layer can be used as a heat activated adhesive to bond the facing to the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing.

[0046] A fifth sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the other facings of the faced insulation assemblies of the subject invention is a laminate including a natural kraft paper or tissue paper overlaid on each major surface with a polymeric coating or film layer. The fifth sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. The polymeric coating or film layers encapsulate the natural kraft paper or tissue paper and thereby make the sheet material more moisture resistant and fungi growth resistant than a typical uncoated kraft facing material. An example of a polymeric coating or film layer is a polyolefin coating or film layer, such as but not limited to a polyethylene or polypropylene coating or film layer with a fungi growth-inhibiting agent. An example of the fifth sheet material is a laminate that includes an unbleached natural kraft base layer, e.g. a 20-30 lb/3 msf natural kraft that is encapsulated between outer and inner white-pigmented HDPE film layers such as HDPE film layers applied at a weight of about 7-15 lbs/3 msf. This example of the fifth sheet material is a balanced sheet material that protects the encapsulated kraft layer, has excellent fold-ability (folds easily and holds the fold), is almost waterproof, and exhibits increased toughness. The polymeric coating or film layer forming the outer layer of the laminate and the outer major surface of the laminate may have a higher temperature softening point than the polymeric coating or film layer forming the inner layer of the laminate and the inner major surface of the laminate e.g. the outer polymeric layer may have a softening point of about 250° F. while the inner polymeric layer may have a softening point of less than 190° F. (a 60° F. temperature difference). The inner layer of the laminate can thus be used as a heat activated bonding layer for bonding the facing to the first major surface of the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing. The outer polymeric layer can be made is various colors. A preferred color for a facing used in a faced insulation assembly with a white insulation layer, such as a white, formaldehyde free, fiberglass insulation layer, is white.

[0047] A sixth sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the other facings of the faced insulation assemblies of the subject invention is a lightweight nonwoven polymeric filament or fiber mat (e.g. a lightweight spunbond nonwoven continuous polyester, polypropylene or polyethylene filament mat or a lightweight nonwoven staple polyester, polypropylene or polyethylene fiber mat) or a lightweight nonwoven fiberglass mat. The sixth sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. An example of a lightweight spunbond nonwoven polymeric filament mat that may be used as the sixth sheet material is a lightweight spunbond nonwoven continuous polyester filament mat having a weight between 15 and 30 grams per square meter, such as a spunbond nonwoven polyester mat sold by Johns Manville International, Inc., under the designation type 488/15, type 488/20, or type 488/30. An example of a lightweight nonwoven fiberglass mat that may be used as the sixth sheet material is a lightweight nonwoven fiberglass mat having a weight between 20 and 80 grams per square meter, such as a nonwoven fiberglass mat sold by Johns Manville International, Inc., under the trade designation Dura-Glass® style 3011 mat. These mats typically have a water vapor permeance rating greater than 5 perms. A filament web bonding layer, an open mesh bonding layer, or a sprayed on particulate or fiberized bonding layer made of a polymeric material having a lower softening point than the mat may be adhered to an inner major surface of either of these mats and used as a heat activated bonding layer to bond either of these mats to the first major surface of the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing. For example a polypropylene web or open mesh having a softening point of about 250° F. or less can be adhered to the inner major surface of a spunbond nonwoven polyester mat having a softening point of about 350° F. or greater.

[0048] A seventh sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the facings of the other faced insulation assemblies of the subject invention is a laminate that includes a lightweight nonwoven polymeric filament or fiber mat (e.g. a lightweight spunbond nonwoven continuous polyester, polypropylene or polyethylene filament mat or a lightweight nonwoven staple polyester, polypropylene or polyethylene fiber mat) or a lightweight nonwoven fiberglass mat overlaid with a polymeric film or polymeric coating layer. The seventh sheet material includes a fungi growth-inhibiting agent. The seventh sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. An example of a lightweight spunbond nonwoven polymeric filament mat that may be used as the seventh sheet material is a lightweight spunbond nonwoven continuous polyester filament mat having a weight between 15 and 30 grams per square meter, such as a spunbond nonwoven polyester mat sold by Johns Manville International, Inc., under the trade designation type 488/15, type 488/20, or type 488/30. An example of a lightweight nonwoven fiberglass mat that may be used as the seventh sheet material is a lightweight nonwoven fiberglass mat having a weight between 20 and 40 grams per square meter, such as a nonwoven fiberglass mat sold by Johns Manville International, Inc., under the trade designation Dura-Glass® style 3011 mat. These mats typically have a water vapor permeance rating greater than 5 perms. The polymeric film or polymeric coating layer forms the outer layer and the outer major surface of the seventh sheet material and when combined with the spunbond nonwoven polymeric mat or fiberglass mat can provide the seventh sheet material with a water vapor permeance rating equal to or less than 1 perm. A filament web bonding layer, a mesh bonding layer, or a particulate or fiberized bonding layer made a polymeric material having a lower softening point than the mat may be adhered to an inner major surface of either of these mats and used as a heat activated bonding layer to bond either of these mats to the first major surface of the insulation layer without negatively impacting the physical properties or the visual appearance of the facing or otherwise degrading the facing. For example a polypropylene web, open mesh, or fiber layer having a softening point of about 250° F. or less can be adhered to the inner major surface of a spunbond nonwoven polyester mat having a softening point of about 350° F. or greater.

[0049] An eighth sheet material that may be used for the facing 22 of the faced insulation assembly 20 and for the other facings of the other faced insulation assemblies of the subject invention is a collapsed tubular sheet material that includes first and second lateral gusset portions. The eighth sheet material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and more preferably, exhibits no sporulating or non-sporulating growth. Depending on which of the first seven sheet materials is used to form the eighth sheet material, the eighth sheet material may or may not include a fungi growth-inhibiting agent. As shown in FIGS. 7 and 8, which show the tubular sheet material 48 prior to and after the sheet has been collapsed to form the facing, the tubular sheet material has first and second central portions 50 and 52 extending between and joining the two lateral gusset portions 54 and 56. The central portions 50 and 52 of the collapsed tubular sheet material are bonded together to form the central field portion of the facing sheet. As shown the lateral gusset portions 54 and 56 each include four layers while the central portion of the collapsed tubular sheet material includes two layers. By including an additional lateral gusset or gussets, the lateral gusset portions could each include six or more layers. The inclusion of additional layers in each of the lateral gusset portions 54 and 56 of the collapsed tubular sheet material relative to the central portion of the collapsed tubular sheet material enables the formation of lateral tabs on the facing of increased integrity and tear through resistance while using a thinner or less expensive sheet material to form collapsed tubular sheet material. The collapsed tubular sheet material 48 maybe made from transparent, translucent or pigmented polymeric films of one or more layers (e.g. cast or coextruded films) such as but not limited to LDPE films, HDPE films, PP films or combinations thereof with or without an outer mineral coating or polymeric coating layer or from kraft paper or lightweight natural kraft paper with or without an outer mineral coating or polymeric coating layer or a polymeric film layer.

[0050] As previously indicated each facing material of the subject invention is fungi growth resistant; preferably exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth and more preferably, exhibits no sporulating or non-sporulating growth. Where the sheet material used to form the facing is a multilayer sheet material and includes a fungi growth-inhibiting agent and/or pesticide, the fungi growth-inhibiting agent or fungi growth-inhibiting agent and pesticide may be included in any one or more or all of the layers in the sheet material, especially the outermost layer, mixed throughout the layer(s), or applied topically. Where the sheet material includes at least one polymeric film or polymeric coating layer, the fungi growth-inhibiting agent or fungi growth-inhibiting agent and pesticide may be included in any one or more of the polymeric film or polymeric coating layers. Where the sheet material includes one or more kraft or tissue paper layers, the fungi growth inhibiting agent or fungi growth inhibiting agent and pesticide may be included in any one or more of the kraft or tissue paper layers. Where the sheet material includes one or more mineral coating, polymeric coating, or ink coating layers, the fungi growth-inhibiting agent or fungi growth-inhibiting agent and pesticide may be included in any one or more of the coating layers. Where the sheet material includes one or more nonwoven polymeric mat layers, the fungi growth-inhibiting agent or fungi growth-inhibiting agent and pesticide may be included in any one or more of the polymeric mat layers. It should also be noted that the fungi growth-inhibiting agent used in the subject invention may comprise one fungi growth-inhibiting agent or a combination or blend of two or more fungi-growth inhibiting agents to provide a broader or more efficacious fungi growth resistance for the sheet materials of the subject invention.

[0051] As alternatives to only including the fungi growth-inhibiting agent or fungi growth-inhibiting agent and pesticide in the sheet material of the facing, the fungi growth-inhibiting agent or fungi growth-inhibiting agent and pesticide could be: included only in the bonding layer bonding the central field portion of the facing to the first major surface of the insulation layer or included in both the sheet material of the facing and the bonding layer bonding the central field portion of the facing to the first major surface of the insulation layer.

[0052] An example of a fungi growth-inhibiting agent is the fungi growth resistance additive 2-(4-Thiazolyl) Benzimidazole, also known as “TBZ”. Multiple forms of TBZ are available for specific applications in polymers, adhesives, coatings and additives. One example of the fungi growth resistance additive is available from Ciba Specialty Chemicals under the trade designation Irgaguard F-3000 fungi growth resistance additive. It is believed that the inclusion of the Irgaguard F-3000 fungi growth resistance additive in amounts between 0.05% and 0.5% by weight of the materials in the polymeric films, polymeric coatings, mineral coatings, ink coatings, kraft or tissue papers, and continuous polymeric filaments of the first through the eighth sheet material will effectively inhibit fungi growth. Examples of other antimicrobial, biocide fungi growth-inhibiting agents that may be used are silver zeolyte fungi growth inhibiting agents sold by Rohm & Haas Company under the trade designation KATHON fungi growth-inhibiting agent, by Angus Chemical Company under the trade designation AMICAL 48 fungi growth-inhibiting agent, and by Healthshield Technologies, LLC. under the trade designation HEALTHSHIELD fungi growth-inhibiting agent. Sodium pyrithione and zinc pyrithione, which are commonly available, may also be used as fungi growth-inhibiting agents in the subject invention; and where the sheet material includes an asphalt coating layer, zinc oxide in amounts between 3% and 20% by weight may be used as a filler in the asphalt to make the asphalt fungi growth resistant or to at least enhance the fungi-growth inhibiting characteristics of the asphalt.

[0053] An example of one type of pesticide that may be used in the subject invention is a termiticide that contains fipronil as the active ingredient. This termiticide is non-repellent to termites and lethal to termites through ingestion, contact and/or transferal. Aventis Environmental Science USA of Montvale, N.J. sells such a termiticide under the trade designation “TERMIDOR”. Since the termites do not smell, see or feel this termiticide, the termites continue to pass freely through the treated area picking up the termiticide and carrying the termiticide back to the colony nest. In the colony nest, other termites that contact the contaminated termites through feeding or grooming or through cannibalizing the termites killed by the termiticide become carriers of the termiticide thereby spreading the termiticide throughout the colony and exterminating the termites.

[0054] Preferably, each of the faced insulation assemblies of the subject invention has a composite flame spread and smoke developed rating equal to or less than 25/50 as measured by the ASTM E 84-01 tunnel test method, entitled “Standard Test Method for Surface Burning Characteristics of Building Materials”, published July 2001, by ASTM International of West Conshohocken, Pa. Each sheet material of the subject invention and each facing of the subject invention, as bonded to the insulation layer, passes the ASTM fungi test C 1338-00, entitled “Standard Test Method for Determining Fungi Resistance of Insulation Materials and Facings”, published August 2000, by ASTM International of West Conshohocken, Pa. Preferably each sheet material of the subject invention and each facing of the subject invention, as bonded to the insulation layer, has a rating of 1 or less and more preferably 0, as rated by the ASTM fungi test G 21-96 (Reapproved 2002), entitled “Standard Practice for determining Resistance of Synthetic Polymeric Materials to Fungi”, published September 1996 by ASTM International of West Conshohocken, Pa.

[0055] For certain applications, it is preferable to have the sheet material of the subject invention and the field portion of the facing of the subject invention, as bonded to the major surface of the insulation layer (e.g. major surface 26 of the insulation layer 24), exhibit a water vapor permeance rating approximately equal to but no greater than 1 grain/ft2/hour/inch Hg (approximately equal to but no greater than 1 perm) so that the facing functions as a vapor retarder or barrier for the faced fibrous insulation blanket, e.g. a faced resilient fiberglass insulation blanket. For other applications, it is preferable to have the sheet material of the subject invention “water vapor breathable” and the field portion of the facing of the subject invention, as bonded to the major surface of the insulation layer (e.g. major surface 26 of insulation layer 24) “water vapor breathable” and exhibit a water vapor permeance rating of more than 1 grain/ft2/hour/inch Hg (more than 1 perm); preferably, about 3 or more grain/ft2/hour/inch Hg (about 3 or more perms); and, more preferably, about 5 or more grains/ft2/hour/inch Hg (about 5 or more perms) so that the facing functions as a porous facing for the faced insulation assembly that permits the passage of water vapor through the faced surface of the faced insulation assembly of the subject invention. For sheet materials such as the first through the fifth, the seventh and the eighth sheet materials that normally have a water vapor permeance rating equal to or less than one perm, the sheet material forming the central field portion of the facing (field portion 32 in the facing 22) can be selectively modified (e.g. perforated) to increase the water vapor permeance rating to a desired level. If the sheet materials are perforated, the perforations may be either microscopic-perforations or macroscopic-perforations with the number and the size of the perforations per unit area of the central field portion of the facing being selected to achieve the desired water vapor permeance rating for the facing. In addition, the bonding layer bonding the central field portion of the facing to the first major surface of the insulation layer can be applied so that the facing as applied to the insulation layer provides the faced insulation assembly with the desired water vapor permeance rating. For example, the bonding layer applied to the central field portion of the facing could be formed in: a series of spaced apart longitudinally extending adhesive strips of selected width(s) and spacing(s), a series of spaced apart transversely extending adhesive strips of selected width(s) and spacing(s), a uniform or random pattern of adhesive dots of selected size(s) and spacing(s), a continuous adhesive layer of a selected uniform thickness or selected varying thicknesses, or some combination of the above, to achieve with the water vapor permeance rating of the central field portion of the facing a selected water vapor permeance rating for the central field portion of the facing as applied to the first major surface of the insulation layer. With the sixth sheet material, which may have a water vapor permeance rating of 25, 50, 100 greater, or any sheet material that may have a higher water vapor permeance rating than desired for a particular application, the bonding layer could be used to reduce the water vapor permeance rating of the central field portion of the facing without the use of an outer coating on the sheet material.

[0056] As discussed above, various bonding agents may be used as the bonding layer to bond the sheet material forming the central field portion of the facings of the subject invention to the major surface of the insulation layer, such as but not limited to asphalt and amorphous polypropylene, and these bonding agents may be applied by different methods. For example, as the faced insulation assembly is being manufactured, the bonding agent could be applied to the inner major surface of the facing immediately prior to applying the facing to the insulation layer by: printing the bonding agent on the inner major surface of the facing, applying the bonding agent to the inner major surface of the facing using a particulate or fiberized hot melt spray or water based spray, or by applying a water based or other bonding agent to the inner major surface of the facing by roll coating. Alternatively, the bonding agent, e.g. a heat activated bonding agent, can be preapplied to the inner major surface of the facing using the same methods when the facing is manufactured and rolled into long rolls and the bonding agent can be activated when the rolls of facing are unwound and adhered to the major surface of the insulation layer.

[0057] FIGS. 9 to 22 show additional embodiments of the faced insulation assembly of the subject invention. The elements of the faced insulation assemblies of FIGS. 9 to 22 that correspond to those of FIGS. 1 to 3 will have corresponding reference numerals in the hundreds with the same last two digits as the reference numerals used for those elements in FIGS. 1 to 3. Unless otherwise stated the elements of FIGS. 9 to 22 identified with reference numerals having the same last two digits as the reference numerals referring to those elements in FIGS. 1 to 3 are and function the same as those of FIGS. 1-3.

[0058] FIG. 9 shows a partial cross section of a faced insulation assembly 120 of the subject invention with a facing sheet 122 that has Z-folded tabs 158 (only one of which is shown) and FIG. 10 shows a partial cross section of a faced insulation assembly 220 with of the subject invention that has C-folded tabs 260 (only one of which is shown) that can be unfolded and extended beyond the lateral surface of the insulation layer 124 or 224 for attachment to and/or to overlay framing members. The Z-folded tabs 158 and C-folded tabs 260 are substituted for the tabs 34, are typically between about 0.5 and about 2.0 inches in width, and typically can be extended beyond the lateral surfaces of the insulation layers 124 and 224 between about 0.25 and about 1.5 inches. Like the central field portion 32 and lateral tabs 34 of facing 22, the central field portion 132 and lateral tabs 158 of facing 122 and the central field portion 232 the lateral tabs 260 of the facing 222 are made from the same piece of sheet material.

[0059] FIGS. 11 and 12 show partial cross sections of additional embodiments 320 and 420 of the faced insulation assembly of the subject invention. In the facings 322 and 422 of the embodiments 320 and 420, lateral tabs 364 and 466 are substituted for the lateral tabs 34 of facing 22. The tabs 364 and 466 are made of materials that differ from the material used to form the central field portions 332 and 432 of the facings 322 and 422; are bonded by adhesive layers 368 and 470, by ultra sonic welding or by other bonding means to the upper surface of lateral edge portions of the central field portion 332 and 432 of the facings 322 and 422; and are typically between about 0.5 and about 2.0 inches in width. The tab 364 of the faced insulation assembly 320 is like the tab 34 of the faced insulation assembly 20. The tab 466 of the faced insulation assembly 420 of FIG. 12 is a Z-folded tab. The tabs 364 and 466 can be unfolded and extended beyond the lateral surfaces of the insulation layers 324 and 424 (typically extended between 0.25 and 1.5 inches beyond the lateral surfaces of the insulation layers) for attachment to or to overlay framing members. By way of example, the materials used to form the central field portions 332 and 432 of the facings 322 and 422 and the lateral tabs 364 and 466 of the facings 332 and 432 may differ in thickness (e.g. a 1.0 mil thick films form the central field portions 332 and 432 of the facings while a 1.5 mil thick films form the tabs 364 and 466) and/or in composition (e.g. the central field portions 332 and 432 of the facings may be made from polypropylene films while the tabs 364 and 466 are formed from polyester films). The central field portions 332 and 432 of the facings may be made of single layers while the tabs 364 and 466 are each a laminate of multiple layers for greater integrity. The central field portions 332 and 432 of the facings may be made of laminates containing a certain number of layers while the tabs 364 and 466 are made of laminates containing a different number of layers and typically more layers for increased tab integrity. The layers of the laminates may include both layers of sheet materials (e.g. film, mat, or paper materials) and coating materials. The central field portions of the facings each may have one or more layers of a film, a coated film, paper, a coated paper, a fiberglass or spunbond polymeric filament or fiber mat, or a coated fiberglass or spunbond polymeric filament or fiber mat while the tabs are made of an open spunbond polymeric filament or fiber mat or an open mesh that is sufficiently open to permit adhesive to pass through the tabs to bond wallboard directly to framing members through the tabs.

[0060] FIG. 13 shows an embodiment 520 of the faced insulation assembly of the subject invention wherein both the facing 522 and the insulation layer 524 are longitudinally separable to form faced insulation sections 572 having lesser widths than the faced insulation assembly 520. The insulation layer 524 has one or more longitudinally extending series of cuts and separable connectors, schematically represented by lines 574, which enable the insulation layer 524 to be pulled apart or separated by hand into the insulation sections 572 of lesser widths than the insulation layer 524. For each such series of cuts and separable connectors 574 in the insulation layer 524, the field portion 532 of the sheet 530 forming the facing 522 has a line of weakness 576 therein that is longitudinally aligned with the series of cuts and separable connectors so that the facing can also be separated or pulled apart by hand at each series of cuts and separable connectors. The line of weakness 576 may be formed as a perforated line, as an etched score line that reduces the thickness of the sheet material along the line, or the line may be otherwise weakened to facilitate the separation of the facing sheet by hand along the line 576. Other than the one or more series of cuts and separable connectors 574 in the insulation layer 524 and the one or more lines of weakness 576 in the facing 522, the faced insulation assembly 520 of FIG. 13 is the same as the faced insulation assembly 20.

[0061] FIGS. 14 and 15 show an embodiment 620 of the faced insulation assembly of the subject invention wherein both the facing 622 and the insulation layer 624 are longitudinally separable to form faced insulation sections 678 having lesser widths than the faced insulation assembly 624. The insulation layer 624 has one or more longitudinally extending series of cuts and separable connectors, schematically represented by lines 680, which enable the insulation layer 624 to be pulled apart or separated by hand into the insulation sections 678 of lesser widths than the insulation layer 624. For each such series of cuts and separable connectors 678 in the insulation layer 624, the field portion 632 of the sheet 630 forming the facing 622 has a fold 682 therein that is longitudinally aligned with the series of cuts and separable connectors. A separable pressure sensitive or other separable bonding adhesive 684 separably bonds the two segments of each fold 682 to each other and, typically, the fold line 686 joining the segments of each fold 682 will be perforated, scored, or otherwise weakened to permit the fold to be pulled apart or separated by hand at the fold line 686 to form tab segments. Preferably, each segment of each fold 682 is between about 0.25 and about 1.5 inches in width. Other than the one or more series of cuts and separable connectors 680 in the insulation layer 624 and the one or more folds 682 in the facing 622 with weakened fold lines 686, the faced insulation assembly 620 of FIGS. 14 and 15 is the same as the faced insulation assembly 20.

[0062] FIGS. 16, 17 and 18 show a faced insulation assembly 720 of the subject invention that is faced with a facing 722 of the subject invention without preformed tabs. The faced insulation assembly 720 of FIGS. 16, 17 and 18 includes the facing 722 and an insulation layer 724. Preferably, the insulation layer 724 is made of a resilient insulation material, such as but not limited to a fiberglass insulation, that can be compressed in the direction of its width, e.g. laterally compressed an inch or more, and, after the compressive forces are released, will recover or substantially recover to its initial width. The insulation layer 724 has first and second major surfaces 726 and 728, which are defined by the length and width of the insulation layer, and a thickness. The facing 722 of the faced insulation assembly 720 is formed by a sheet material that has a central field portion 732, that is substantially coextensive with the first major surface of the insulation layer 724, but has no preformed tabs. The central field portion 732 of the facing 722 has a first outer major surface and a second inner major surface. The central field portion 732 of the facing 722 overlays and is bonded, typically by a bonding layer 736 on the inner major surface of central field portion 732 of the facing, to the major surface 726 of the insulation layer 724. As best shown in FIG. 17, in a preferred form of this embodiment the bonding layer 736 bonding the central field portion 732 of the facing to the first major surface 726 of the insulation layer 724 does not extend to the lateral edges of either the insulation layer 724 or the facing 722 so that the lateral edge portions 788 of the facing 722 (e.g. portions about 0.25 to about 1.5 inches in width) are not directly bonded to the major surface 726 of the insulation layer. When the insulation layer 724 is compressed laterally to fit between a pair of framing members that are spaced apart a distance less than the width of the faced insulation assembly 720, this facilitates the separation of the lateral edge portions 788 of the facing 722 from the insulation layer 724 so that the lateral edge portions 788 of the facing 722 can extend beyond the lateral surfaces of the laterally compressed insulation layer 724 (e.g. between 0.25 and 1.5 inches) to form lateral tabs. However, as shown in FIG. 18, the bonding layer 736 bonding the central field portion 732 of the facing 722 to the first major surface 726 of the insulation layer 724 may extend to the lateral edges of the insulation layer 724 and the facing 722 so that the bond between the lateral edge portions 788 of the facing 722 and the major surface 726 of the insulation layer must be broken before the lateral edge portions 788 of the facing 722 can be separated from the major surface 726 of the insulation layer 724 and extended beyond the insulation layer to form the lateral tabs. With the embodiment of FIG. 18, if the installer does not desire to form lateral tabs on the facing 722 that extend laterally beyond the insulation layer when the insulation layer is compressed laterally, the installer can leave the lateral edge portions 788 of the facing 722 bonded to the lateral edge portions of the major surface 726 of the insulation layer.

[0063] FIGS. 19, 20 and 21 show an embodiment 820 of the faced insulation assembly of the subject invention wherein both the facing 822 and the insulation layer 824 are longitudinally separable to form faced insulation sections 890 having lesser widths than the faced insulation assembly 820. Like the faced insulation assembly 720 of FIGS. 16, 17 and 18, the facing of faced insulation assembly 820 does not have preformed tabs and the insulation layer 824 is preferably made of a resilient insulation material, such as but not limited to a fiberglass insulation, that can be compressed in the direction of its width, e.g. laterally compressed an inch or more, and, after the compressive forces are released, will recover or substantially recover to its initial width. The insulation layer 824 has one or more longitudinally extending series of cuts and separable connectors, schematically represented by lines 892, which enable the insulation layer 824 to be pulled apart or separated by hand into the insulation sections 890 of lesser widths than the insulation layer 824. For each such series of cuts and separable connectors 892 in the insulation layer 824, the field portion 832 of the sheet 830 forming the facing 822 has a line of weakness 894 therein that is longitudinally aligned with the series of cuts and separable connectors and can be pulled apart or separated by hand. The line of weakness 894 may be formed as a perforated line, as an etched score line that reduces the thickness of the sheet material along the line, or the line may be otherwise weakened to facilitate the separation of the facing sheet along the line 894.

[0064] Preferably, as shown in FIG. 19, the bonding layer 836 bonding the central field portion 832 of the facing sheet to the first major surface 826 of the insulation layer 824 does not extend to the lateral edges of either the insulation layer 824 or the facing 822 so that the lateral edge portions 896 of the facing sheet are not directly bonded to the major surface 826 of the insulation layer. Preferably, the bonding layer 836 will end from about 0.25 to about 1.5 inch from the lateral edges of the facing sheet 822 and the insulation layer 824 so that the width of the unbonded lateral edge portions 896 is between about 0.25 and about 1.5 inches. Preferably, as shown in FIGS. 19 and 20, the bonding layer bonding the central field portion 832 of the facing sheet to the first major surface 826 of the insulation layer 824 is also omitted from portions 898 of the facing located adjacent each series of cuts and separable connectors 892 in the insulation layer 824 so that the facing is not directly bonded to the insulation layer along each series of cuts and separable connectors 892. Preferably, the bonding layer 836 will be omitted for a spacing of about 0.25 to about 1.5 inches from each side of each series of cuts and separable connectors in the insulation layer 824 and the lines 894 of weakness in the facing sheet 822 so that the widths of the unbonded facing portions 898 are between about 0.25 and about 1.5 inches. The omission of bonding agent from adjacent the lateral edges of the faced insulation assembly 820 facilitates the separation of the lateral edge portions 896 of the facing sheet from the insulation layer 824 so that the lateral edge portions 896 of the facing 822 can be extended as tabs beyond the lateral surfaces of the laterally compressed insulation layer 824 or extended as tabs beyond the lateral surfaces of compressed insulation sections 890 that have been separated from the insulation layer 824. The omission of bonding agent from adjacent the cuts and separable connectors 892 facilitates the separation of the portions 898 of the facing sheet from the insulation layer 824 adjacent each series of cuts and separable connectors 892 so that the portions 898 of the facing sheet can be extended as tabs beyond the lateral surfaces of the laterally compressed insulation sections 890. However, the bonding layer 836 bonding the central field portion 832 of the facing to the first major surface 826 of the insulation layer 824 may extend to the lateral edges of the insulation layer 824 and the facing sheet (e.g. as shown in FIG. 18) so that the lateral edge portions 896 of the facing sheet must be separated from the major surface 826 of the insulation layer 824 to form the lateral tabs and, as shown in FIG. 21, the facing may be directly bonded to the major surface 826 of insulation layer 824 adjacent each series of cuts and separable connectors 892 so that the portions 898 of the facing sheet must be separated from the major surface 826 of the insulation layer 824 to form tabs.

[0065] When the insulation layer 824 of faced insulation assembly 820 is compressed in the direction of its width to fit between a pair of framing members that are spaced a distance less than the width of insulation layer 824, the lateral edge portions 896 of the facing sheet separate or can be separated from the major surface 826 of the insulation layer and extended as tabs beyond the lateral surfaces of the laterally compressed insulation layer 824 to provide, if desired, a vapor retarding barrier between the facing and the framing members and/or for attachment to the framing members. When an insulation section 890 of faced insulation assembly 820 is compressed in the direction of its width to fit between a pair of framing members that are spaced a distance less than the width of insulation section 890, the portions of the facing sheet adjacent the lateral surfaces of the compressed insulation section 890 (portions 896 and/or 898) separate or can be separated from the major surface 826 of the insulation layer and extended as tabs beyond the lateral surfaces of the laterally compressed insulation section 890 to provide a vapor retarding barrier between the facing and the framing members and/or for attachment to the framing members. Where the central field portion 832 of the facing 822 is bonded to the major surface 826 of the insulation layer 824 across their entire widths, the installer may choose to leave the facing 822 bonded to the major surface of the insulation layer so that no lateral tabs are formed on the insulation layer or sections of the insulation layer when they are compressed laterally.

[0066] FIG. 22 shows an embodiment 920 of the faced insulation assembly of the subject invention. The faced insulation assembly 920 may include a fungi growth resistant facing 922 made of one of the sheet materials of the subject invention described above in this specification and a reflective sheet 912 that radiates heat, e.g. a foil sheet material, a metallized film, or other metallized sheet material. The faced insulation assembly 920 may include a fungi growth resistant facing 922 made of a lightweight polymer (e.g. papermatch) film, a spunbond layer, or one of the other sheet materials described above in this specification, which is laminated to a reflective sheet material that radiates heat, e.g. a foil sheet material, a metallized film, or other metallized sheet material and a reflective sheet 912 that radiates heat, e.g. a foil sheet material, a metallized film, or other metallized sheet material. The faced insulation assembly 920 may include a fungi growth resistant facing 922 made of a lightweight polymer (e.g. papermatch) film, a spunbond layer, or one of the other sheet materials described above in this specification, laminated to a reflective sheet material that radiates heat, e.g. a foil sheet material, a metallized film, or other metallized sheet material and a fungi growth resistant reflective sheet 912 made of a lightweight polymer (e.g. papermatch) film, a spunbond layer, or one of the other sheet materials described above in this specification, laminated to a reflective sheet material that radiates heat, e.g. a foil sheet material, a metallized film, or other metallized sheet material. Preferably, the faced insulation assembly 920 includes a facing 922 made of a lightweight polymer (e.g. papermatch) film, a spunbond layer, or one of the other sheet materials described above in this specification laminated to a foil sheet material and a reflective sheet 912 made of a lightweight polymer (e.g. papermatch) film, a spunbond layer, or one of the other sheet materials described above in this specification laminated to a foil sheet material. Preferably, the foil sheet material of the facing 922 opposes the reflective sheet 912. However, the foil sheet material of the reflective sheet 912 may or may not oppose the facing 922.

[0067] The facing 922 of the faced insulation assembly 920 is formed of a sheet material that has a central field portion 932 extending between a pair of lateral edge portions 933 that are typically between 0.25 and 1.5 inches in width. For certain applications, it is preferable to have the field portion of the facing 922 “water vapor breathable”, i.e. exhibit a water vapor permeance rating of more than 1 grain/ft2/hour/inch Hg (more than 1 perm); preferably, exhibit a water vapor permeance rating of about 3 or more grain/ft2/hour/inch Hg (about 3 or more perms) and, more preferably, exhibit a water vapor permeance rating of about 5 or more grain/ft2/hour/inch Hg (about 5 or more perms) to provide a facing for the faced insulation assembly 920 that permits the passage of water vapor through the faced surface of the faced insulation assembly of the subject invention. The central field portion of the facing 922 may be perforated to provide the necessary porosity to obtain the desired water vapor permeance rating for the faced insulation assembly 920.

[0068] The reflective sheet 912 has a central field portion 914 extending between a pair of lateral edge portions 916 that are typically between 0.25 and 1.5 inches in width. The central field portion 932 of the facing 922 and the central field portion 914 of the reflective sheet 912 are spaced from each other (e.g. spaced from each other between 0.25 and 0.50 inches) to form an insulating air space between the central field portion 932 of the facing 922 and the central field portion 914 of the reflective sheet 912. In addition, there may be a spacer or spacers (e.g. paperboard spacers not shown) between the central field portion 932 of the facing 920 and the central field portion 914 of the reflective sheet 912 to assure that a spacing is maintained between the central field portion of the facing and the central field portion of the reflective sheet. The lateral edge portions 933 of the facing 922 and the lateral edge portions 916 of the reflective sheet 912 are bonded together to form the lateral tabs 934 of the faced insulation assembly 920 that extend laterally beyond the insulating portion of the faced insulation assembly, e.g. to overlap framing members (e.g. furring strips 938 or other framing members) forming a cavity being insulated by the faced insulation assembly and/or for attachment to framing members forming a cavity being insulated by the faced insulation assembly.

[0069] The faced insulation assembly 920 is typically about 15 to 16 or 23 to 24 inches in width for application to cavities defined by framing members located on 16 inch or 24 inch centers and is typically cut to the length of a cavity, e.g. to a length of about eight feet, from a longer length of the faced insulation assembly. The faced insulation assembly 920 is typically packaged, stored, shipped, and handled prior to application in roll form with the facing 922 and the reflective sheet 912 of the faced insulation assembly collapsed together. When installed in a cavity, the faced insulation assembly 920 is cut to a desired length and the tabs 934 of the assembly are pulled laterally to expand the faced insulation assembly and separate the facing 922 and the reflective sheet 912 from each other to create an air space between the facing and the reflective sheet that is typically between 0.25 and 0.50 inches in width.

[0070] FIGS. 23 and 24 show hollow building walls 1110 with cavities that are insulated with unfaced insulation batts 1112, e.g. unfaced fiberglass insulation batts. The wall cavities are each defined by: a wall covering 1114 (such as but not limited to sheathing or gypsum board that is shown where the insulation batts 1112 are broken away); spaced-apart vertically extending framing members 1114 (e.g. studs); and horizontally extending framing members 1116 (e.g. wall plates).

[0071] In FIG. 23, upper and lower sheets 1118, which are partially peeled back to show the insulation batts and framing structure of the wall 1110, overlay the unfaced insulation batts 1112. The sheets 1118 may be made of any of the sheet materials described above in this specification. As applied to the framing members 1114 and 1116, the longitudinal centerlines of the sheets 1118 extend horizontally with the lower lateral edge portion of the upper sheet and upper lateral edge portion of the lower sheet overlapping each other so that the sheets 1118 form a vapor retarding layer of the wall. The sheets 1118 may be unrolled from rolls of the sheet material, cut to desired lengths, and secured to the framing members 1114 and 1116 by staples, beads of adhesive preapplied to the framing members, or by other securing means. Preferably, the sheets 1118 have thicknesses between 2 and 6 mils and have widths that enable the sheets to be overlapped by several inches and, together, extend for the entire height of the wall, e.g. for a eight foot high wall the sheets 1118 may each be about fifty inches in width and about twenty to about one hundred feet long. It is also contemplated that one sheet could be used rather than the two sheets 1118 and that such a sheet would be about eight feet in width for an eight-foot high wall.

[0072] In FIG. 24, side-by-side sheets 1120, which are partially peeled back to show the insulation batts and framing structure of the wall 1110, overlay the unfaced insulation batts 1112. The sheets 1120 may be made of any of the sheet materials described above in this specification. As applied to the framing members 1114 and 1116, the longitudinal centerlines of the sheets 1120 extend vertically with the lateral edge portions of adjacent sheets 1120 being secured to the same vertical frame member 1114 or overlapping each other so that the sheets 1120 form a vapor retarding layer of the wall. The sheets 1120 may be unrolled from rolls of the sheet material, cut to desired lengths, and secured to the framing members 1114 and 1116 by staples, beads of adhesive preapplied to the framing members, or by other securing means. The sheets 1120 may have widths equal to the standard center to center spacing of the vertical frame members 1114 in a wall, e.g. 16 or 24 inch widths, so that the sheets each can overlie a single wall cavity and be secured to the vertical frame members defining the cavity. However, preferably, the sheets 1120 have thicknesses between 2 and 6 mils and have widths that are multiples of the standard cavity widths for a wall e.g. 32, 48, 64, 72, 84, or 96 inch widths that enable the sheets to overlie a plurality of wall cavities and be secured to vertical frame members 1114 of the wall.

[0073] In describing the invention, certain embodiments have been used to illustrate the invention and the practices thereof. However, the invention is not limited to these specific embodiments as other embodiments and modifications within the spirit of the invention will readily occur to those skilled in the art on reading this specification. Thus, the invention is not intended to be limited to the specific embodiments disclosed, but is to be limited only by the claims appended hereto.

Claims

1. A faced building insulation assembly, comprising: an insulation layer; the insulation layer having a length, a width and a thickness; the insulation layer having first and second major surfaces defined by the length and width of the layer; and a facing comprising a sheet having a central field portion overlaying and substantially coextensive with the first major surface of the insulation layer; the central field portion of the sheet having a first outer major surface and a second inner major surface bonded to the first major surface of the insulation layer; the central field portion of the sheet being fungi growth resistant; and the facing, as bonded to the insulation layer, being fungi growth resistant.

2. The faced building insulation assembly according to claim 1, wherein: the central field portion of the sheet exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth; and the facing, as bonded to the insulation layer, exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth.

3. The faced building insulation assembly according to claim 1, wherein: the central field portion of the sheet exhibits no sporulating or non-sporulating growth; and the facing, as bonded to the insulation layer, exhibits no sporulating growth or non-sporulating growth.

4. The faced building insulation assembly according to claim 1, wherein: the sheet has first and second lateral tabs extending for the length of the sheet that are separated from each other by the central field portion of the sheet.

5. The faced building insulation assembly according to claim 4, wherein: the insulation layer is separable longitudinally by hand at a location spaced inwardly from lateral edge surfaces of the insulation layer; and the sheet has a longitudinally extending fold in the central field portion of the sheet that extends for the length of the sheet, is spaced inwardly from each of the lateral tabs, and is aligned longitudinally with the separable location in the insulation layer; and the fold comprises first and second tab segments separably joined together along a fold line that is weakened to facilitate separation by hand of the tab segments.

6. The faced building insulation assembly according to claim 1, wherein: the insulation layer is resilient; the insulation layer is separable longitudinally by hand at a location spaced inwardly from lateral edge surfaces of the insulation layer; and the sheet has a longitudinally extending line of weakness in the central field portion of the sheet that extends for the length of the sheet, is spaced inwardly from each lateral edge of the sheet, is aligned longitudinally with the separable location in the insulation layer, and is separable by hand.

7. The faced building insulation assembly according to claim 1, wherein: the sheet consists essentially of a synthetic paper-like polymeric film layer between about 0.5 and about 3 mils in thickness.

8. The faced building insulation assembly according to claim 7, wherein: the synthetic paper-like polymeric film layer contains the fungi growth-inhibiting agent; and the central field portion of the sheet is bonded to the first major surface of the insulating layer by a heat activated bonding layer.

9. The faced building insulation assembly according to claim 1, wherein: the sheet comprises a polymeric film layer; the sheet is sufficiently clear to enable the first major surface of the insulation layer to be seen through the central field portion of the sheet and is bonded to the insulation layer so that the first major surface of the insulation layer can be seen through the central field portion of the sheet.

10. The faced building insulation assembly according to claim 9, wherein: a fungi growth-inhibiting agent is contained within the polymeric film layer of the sheet; and the central field portion of the sheet is bonded to the first major surface of the insulating layer by a heat activated bonding layer.

11. The faced building insulation assembly according to claim 1, wherein: the sheet consists essentially of an outer mineral coating layer and an intermediate polymeric film layer about 1 mil or less in thickness; and the sheet includes a fungi growth-inhibiting agent.

12. The faced building insulation assembly according to claim 11, wherein: the central field portion of the sheet is bonded to the first major surface of the insulation layer by a heat activated bonding layer.

13. The faced building insulation assembly according to claim 11, wherein: the fungi growth-inhibiting agent is contained within the outer mineral coating layer of the sheet.

14. The faced building insulation assembly according to claim 1, wherein: the sheet consists essentially of an outer mineral coating layer and an inner lightweight 20 to 40 lbs/3 MSF kraft paper layer; and the sheet includes a fungi growth-inhibiting agent.

15. The faced building insulation assembly according to claim 14, wherein: the central field portion of the sheet is bonded to the first major surface of the insulation layer by a heat activated bonding layer.

16. The faced building insulation assembly according to claim 1, wherein: the sheet consists essentially of an outer polymeric film or coating layer and an inner lightweight natural kraft paper layer; the sheet includes a fungi growth-inhibiting agent; the central field portion of the sheet is bonded to the first major surface of the insulation layer by a heat activated bonding layer that is a polymeric film or coating layer; and the outer polymeric film or coating layer and the heat activated bonding layer encapsulate the natural kraft paper layer.

17. The faced building insulation assembly according to claim 16, wherein: the fungi growth-inhibiting agent is contained within the outer polymeric film or coating layer of the sheet.

18. The faced building insulation assembly according to claim 1, wherein: the sheet consists essentially of a mat layer; and the central field portion of the sheet is bonded to the first major surface of the insulation layer by a heat activated bonding layer.

19. The faced building insulation assembly according to claim 18, wherein: the mat layer is a spunbond nonwoven continuous polymeric filament mat weighing between about 15 and about 30 grams per square meter.

20. The faced building insulation assembly according to claim 18, wherein: the mat layer is a nonwoven fiberglass mat weighing between about 20 and about 80 grams per square meter.

21. The faced building insulation assembly according to claim 1, wherein: the sheet consists essentially of an outer polymeric film or coating layer and an inner mat layer; the sheet includes a fungi-growth inhibiting agent; and the central field portion of the sheet is bonded to the first major surface of the insulation layer by a heat activated bonding layer.

22. The faced building insulation assembly according to claim 21, wherein: the mat layer is a spunbond nonwoven continuous polymeric filament mat weighing between about 15 and about 30 grams per square meter.

23. The faced building insulation assembly according to claim 1, wherein: the sheet comprises a laminate formed from a collapsed tubular sheet; the tubular sheet having first and second lateral gusset portions; the tubular sheet having first and second central portions extending between and joining the lateral gusset portions; each of the lateral gusset portions having at least four layers bonded together to form lateral tabs on the sheet; and the first and second central portions of the tubular sheet being bonded together to form the central field portion of the sheet.

24. The faced building insulation assembly according to claim 1, wherein: the sheet includes a pesticide; and the faced insulation assembly has a flame spread and smoke developed rating equal to or less than 25/50 as measured by the ASTM E 84-01 tunnel test method.

25. The faced building insulation assembly, according to claim 1, wherein: the insulation layer is resilient; and the first major surface of the insulation layer has lateral edge portions extending inward from and along lateral edges of the first major surface; and the sheet has lateral edge portions overlaying the lateral edge portions of the first major surface of the insulation layer; the central field portion of the sheet extends between the lateral edge portions of the sheet; and the lateral edge portions of the sheet are not bonded to the lateral edge portions of the insulation layer whereby when the insulation layer is compressed laterally, the lateral edge portions of the facing sheet extend beyond the lateral edges of the first major surface of the insulation layer to form tabs.

26. A facing for a faced building insulation assembly, comprising: a sheet having a length and a width; the sheet having a central field portion for overlaying and being bonded to a major surface of an insulation layer; the central field portion of the sheet having a first outer major surface and a second inner major surface for bonding to a major surface of an insulation layer overlaid by the sheet; and the sheet being fungi growth resistant.

27. The facing for a faced building insulation assembly according to claim 26, wherein: the sheet exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth.

28. The facing for a faced building insulation assembly according to claim 26, wherein: the sheet exhibits no sporulating growth or non-sporulating growth.

29. The facing for a faced building insulation assembly according to claim 26, wherein: the sheet has first and second lateral tabs extending for the length of the sheet that are separated from each other by the central field portion of the sheet.

30. The facing for a faced building insulation assembly according to claim 26, wherein: the sheet has first and second lateral tabs extending for the length of the sheet that are separated from each other by the central field portion of the sheet; and the sheet has at least one longitudinally extending fold in the central field portion of the sheet that extends for the length of the sheet and is spaced inwardly from each of the lateral tabs; and the fold comprises first and second tab segments separably joined together along a fold line that is weakened to facilitate separation by hand of the tab segments.

31. The facing for a faced building insulation assembly according to claim 26, wherein: the central field portion of the sheet is a laminate; and a heat activated bonding layer forms the second inner major surface of the sheet.

32. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet consists essentially of an outer synthetic paper-like polymeric film layer between about 0.5 and about 3 mils in thickness and the heat activated bonding layer.

33. The facing for a faced building insulation assembly according to claim 32, wherein: a fungi growth-inhibiting agent is contained within the outer synthetic paper-like polymeric film layer of the sheet.

34. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet comprises an outer polymeric film layer between about 0.5 and about 3 mils in thickness and the heat activated bonding layer; and the sheet is sufficiently clear to enable an insulation layer faced with the facing to be seen through the central field portion of the sheet.

35. The facing for a faced building insulation assembly according to claim 34, wherein: a fungi growth-inhibiting agent is contained within the outer polymeric film layer of the sheet.

36. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet consists essentially of an outer mineral coating layer, an intermediate polymeric film layer about 1 mil or less in thickness, the heat activated bonding layer, and a fungi growth-inhibiting agent.

37. The facing for a faced building insulation assembly according to claim 36, wherein: the fungi growth-inhibiting agent is contained within the outer mineral coating layer of the sheet.

38. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet consists essentially of an outer mineral coating layer, an intermediate lightweight 20 to 40 lbs/3 MSF kraft paper layer, the heat activated bonding layer, and a fungi growth-inhibiting agent.

39. The facing for a faced building insulation assembly according to claim 38, wherein: the fungi growth-inhibiting agent is contained within the outer mineral coating layer of the sheet.

40. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet consists essentially of an outer polymeric film or coating layer, an intermediate lightweight natural kraft paper layer, the heat activated bonding layer, and a fungi growth-inhibiting agent; the heat activated bonding layer is a polymeric film or coating layer; and the outer polymeric film or coating layer and the heat activated bonding layer encapsulate the natural kraft paper layer.

41. The facing for a faced building insulation assembly according to claim 40, wherein: the fungi growth-inhibiting agent is contained within the outer polymeric film or coating layer of the sheet.

42. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet consists essentially of an outer mat layer and the heat activated bonding layer.

43. The facing for a faced building insulation assembly according to claim 42, wherein: the mat layer is a spunbond nonwoven continuous polymeric filament mat weighing between about 15 and about 30 grams per square meter.

44. The facing for a faced building insulation assembly according to claim 42, wherein: the mat layer is a nonwoven fiberglass mat weighing between about 20 and about 80 grams per square meter.

45. The facing for a faced building insulation assembly according to claim 31, wherein: the sheet consists essentially of an outer polymeric film or coating layer, an intermediate mat layer, the heat activated bonding layer, and a fungi-growth inhibiting agent.

46. The facing for a faced building insulation assembly according to claim 45, wherein: the mat layer is a spunbond nonwoven polymeric filament mat weighing between about 15 and about 30 grams per square meter.

47. The facing for a faced building insulation assembly according to claim 45, wherein: the mat layer is a nonwoven fiberglass mat weighing between about 20 and about 80 grams per square meter.

48. The facing for a faced building insulation assembly according to claim 26, wherein: the sheet comprises a laminate formed from a collapsed tubular sheet; the tubular sheet having first and second lateral gusset portions; each of the lateral gusset portions having at least four layers bonded together to form lateral tabs on the sheet; the tubular sheet having first and second central portions extending between and joining the lateral gusset portions; and the first and second central portions of the tubular sheet being bonded together to form the central field portion of the sheet; and a heat activated bonding layer on the central field portion of the sheet forms the second inner major surface of the sheet.

49. The facing for a faced building insulation assembly according to claim 26, wherein: the sheet includes a pesticide.

50. The facing for a faced building insulation assembly according to claim 26, wherein: the central field portion of the sheet has a water vapor permeance rating greater than 1 perm.

51. A faced building insulation assembly, comprising: a facing sheet; the facing sheet having lateral edge portions and a central field portion extending between the lateral edge portions of the facing sheet; the facing sheet being fungi growth resistant; a reflective sheet material; the reflective sheet material having lateral edge portions and a central field portion extending between the lateral edge portions of the reflective sheet material; and the lateral edge portions of the facing sheet being bonded to the lateral edge portions of the reflective sheet material; and the central field portion of the facing sheet being spaced from the central field portion of the reflective sheet material to form an insulating space within the faced insulation assembly.

52. The faced building insulation assembly according to claim 51, wherein: the facing sheet exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating and non-sporulating growth.

53. The faced building insulation assembly according to claim 51, wherein: the facing sheet exhibits no sporulating or non-sporulating growth.

54. The faced building insulation assembly according to claim 51, wherein: the fungi growth resistant sheet material includes a pesticide.

55. The faced building insulation assembly according to claim 51, wherein: the central field portion of the facing sheet has a water vapor permeance rating of about 5 perms or greater.

56. An insulation system for a building wall, floor or ceiling; the wall, floor or ceiling comprising a series of cavities that are each defined in part by spaced apart parallel extending framing members; the insulation system comprising: unfaced fibrous insulation batts contained within each of the series of cavities; and a vapor retarder covering overlying the series of cavities and secured to the faming members defining the cavities; the vapor retarder covering comprising a sheet material having a first major surface, a second major surface, and having a fungi growth-inhibiting agent in amounts that result in the sheet material being fungi growth resistant.

57. The insulation system according to claim 56, wherein: the sheet material exhibits no more than traces of sporulating growth, non-sporulating growth, or both sporulating growth and non-sporulating growth.

58. The insulation system according to claim 56, wherein: the sheet material exhibits no sporulating growth or non-sporulating growth.

59. The insulation system according to claim 56, wherein: the sheet material consists essentially of a synthetic paper-like polymeric film layer between about 0.5 and about 3 mils in thickness that contains the fungi growth-inhibiting agent.

60. The insulation system according to claim 56, wherein: the sheet material consists essentially of a polymeric film layer, sufficiently clear to enable the unfaced insulation batts to be seen through the sheet material, that contains the fungi growth-inhibiting agent.

61. The insulation system according to claim 56, wherein: the sheet material comprises an outer mineral coating layer that forms the first major surface of the sheet material and overlies a polymeric film layer that is about 1 mil or less in thickness and the fungi growth-inhibiting agent is contained in outer mineral coating layer.

62. The insulation system according to claim 56, wherein: the sheet material comprises an outer mineral coating layer that forms the first major surface of the sheet material and overlies a an inner lightweight 20 to 40 lbs/3 MSF kraft paper layer and the fungi growth-inhibiting agent is contained in kraft paper layer.

63. The insulation system according to claim 56, wherein: the sheet material comprises an outer polymeric film or coating layer that forms the first major surface of the sheet material and overlies an inner lightweight 20 to 40 lbs/3 MSF kraft paper layer.

64. The insulation system according to claim 63, wherein: the fungi growth-inhibiting agent is contained in kraft paper layer.

65. The insulation system according to claim 63, wherein: the fungi growth-inhibiting agent is contained in the outer polymeric film or coating layer.

66. The insulation system according to claim 56, wherein: the sheet material consists essentially of a mat layer.

67. The insulation system according to claim 66, wherein: the mat layer is a spunbond nonwoven continuous polymeric filament mat weighing between about 15 and about 30 grams per square meter.

68. The insulation system according to claim 66, wherein: the mat layer is a nonwoven fiberglass mat weighing between about 20 and about 80 grams per square meter.

69. The insulation system according to claim 56, wherein: the sheet consists essentially of an outer polymeric film or coating layer that forms the first major surface of the sheet material and an inner mat layer.

70. The insulation system according to claim 69, wherein: the mat layer is a spunbond nonwoven continuous polymeric filament mat weighing between about 15 and about 30 grams per square meter.