This invention relates generally to insulation panels and more particularly a thermal insulation panel for the exterior and interior walls of a building and methods of installation and manufacture.
Most buildings suffer from heat loss through their walls due to being of solid wall construction, a lack of cavity wall insulation, inability of the building to have such systems retrofitted, or the sheer cost and complexity of fitting external wall insulation.
The requirement for suitable weather conditions, high time and lack of skilled labour necessary to install currently available forms of wall insulation to existing housing stock is a reality resulting in low take up of this energy saving measure.
Current retrofit insulation systems are made up of various materials such as insulation boards, cementious layers, reinforcing layer, further cementious layer, followed by a decorative or colour coat, resulting in a multi layered system applied in situ, requiring highly skilled workers to apply them with installation times measured in weeks rather than days.
Current over cladding systems have such described issues due to their complexity in their manufacturing and installation processes which if installed incorrectly will affect the performance of the product; this is the unfortunate justification for the increase time and costs of such products.
The installers of currently available systems are required to be trained in a number of skilled trades, such as joinery, brickwork, dry lining, insulation, carpentry and plastering; which together add to the cost of training that installation companies have to fund, potentially reducing their willingness to fully train installers to competent standards leaving them with less than adequate training or substantially increasing the labour cost element of the installation resulting in higher cost of the exterior wall installation to the building owner.
Some elements of multi-layered exterior insulation systems require that they be installed in dry weather to stop the constituent materials becoming water damaged and allowing water porous layers to dry out before they can be relied upon to perform to specification; the consequence of this is that installers will not be able to install their particular system at certain periods of the year or during potentially unpredictable and unsuitable weather conditions, such as heavy rain, snow or high winds. Installers may in this instance take steps to install weatherproof coverings (such as scaffolding with weatherproof sheeting) around the building before they install, which will add to the cost and time to complete the installation process. The cementious layers also require the air temperature to be above defined cold temperatures, so that they can dry correctly; where if this is not the case, then installers will not be able to prepare and apply the cement until suitable weather conditions prevail.
The complex nature of current insulated cover cladding systems mean they usually have to be permanently installed, adding to the cost and difficulty of making further changes, modifications and developments to the building as owners may later require.
The sheer cost of currently available systems for the average three bedroom detached house having financial payback periods of over decades (as calculated by dividing the total installation costs by the annual savings in heating costs derived from the having the system fitted) making them unaffordable and financially unattractive investments, unless significant government financial incentives are provided to subsidise the installation costs; requiring national governments to go through lengthy legislative processes to put such support in place and when there are alternative energy saving schemes with a quicker payback time.
With the cost of energy and gas rising at unprecedented levels above the rate of inflation and the effects of climate change becoming ever more apparent, governments and consumers alike want to reduce their heating costs. However when cost, installation time, weather risks and payback of current systems are taken into account, exterior and interior wall building insulation systems may not be as attractive as needed for mass take-up; the present invention solves these pressing issues as well as other significant shortcomings in a novel and non-obvious way which have not previously existed in the field.
In accordance with aspects of the present invention there is provided an insulation panel for a building or structure, the panel comprising a cavity between a front surface and a rear surface with a top edge and a bottom edge, the rear surface extending beyond the top edge in use substantially in a contiguous plane with the rear surface to define a fastening flange, the top edge and the bottom edge reciprocally shaped to each other to allow keyed abutment between insulation panels side by side.
The fastening flange may be substantially rigid.
The cavity may be substantially flat. The cavity may be substantially filled with a stable insulation material. The insulation material may be a solid/formed foam section or fibre filling material.
The front surface and the rear surface may be separable. The front surface at least may be capable of receiving a decorative and/or a protective finish.
The front surface and/or the rear surface may include interference elements or features for material within the cavity. The interference elements may be strips extending on an inner surface. The interference elements may facilitate re-location of the front surface if removed. The interference elements may stabilise the insulation material within the cavity.
The fastening flange may have a width sufficient to orient and present the panel against a flat surface by a cantilever effect when fastened to that surface. The fastening flange may have fastening features such as holes or donut rings and/or markings for a fastener element. The fastening features may be provided at bespoke positions for a particular panel or at standard spacings/distributions. The fastening flange may have a thickness greater than the rear surface. The fastening flange may have a uniform width along the upper edge. The fastening flange may have a width in proportion to the width to the front surface and/or rear surface. The fastening flange may be configured to receive a fastener such as a screw or bolt or nail. The fastening flange may be configured to receive an adhesive on one or both sides. The fastening flange may have a seal. The seal may be provided about any fastener or other fixing mechanism.
The top edge and the bottom edge may be at substantially consistent angles to the plane of the front surface and the rear surface. The top edge and the bottom edge may be reciprocally shaped respectively concave and convex to each other. The top edge and/or the bottom edge of the insulation panel may be formed from detachable elements. The detachable elements may be provided as a pair comprising a top detachable element and a bottom detachable element for mutual cooperation in use. The top edge and/or the bottom edge may be integrally formed with the insulation panel.
The front panel may have a lip which extends beyond the lower edge. The rear panel may have a recess above the bottom edge for a fastening flange in use.
The cavity may include permanent and/or temporary brace elements.
The rear surface may include channels or grooves on the outer surface. The channels or grooves may provide moisture and/or ventilation paths when the insulation panel is associated with a surface.
The front surface and the rear surface may be formed in respective panel parts with all or part or none of the upper edge and/or the bottom edge. The panel parts may be secured together by an interference or snap fit fixing association. The fixing association may be a tongue and groove assembly. The panel parts may be made of the same panel material. The panel material may be any plastics material as described herein.
The cavity is generally closed in use. Ends of the cavity may be closed by trim elements. The trim elements may provide box sides of a box about and for a feature on a surface to which the insulation panel is secured. The box may be closed with a lid across the box and associated with the front surface of the insulation panel about the box. Insulation material may be captured and constrained within the cavity under compressive load between the front panel and the rear panel. The insulation material and/or parts of at least the inner surface of the front surface and rear surface panel forming the cavity may include a heat colour sensitive constituent and/or a moisture colour change constituent.
Aspects of the present invention also include an insulation panel assembly comprising a plurality of panels as described above with a respective bottom edge and a top edge in adjacent side-by-side panels in the assembly substantially abutting each other.
The fastening flanges may retain the assembly to a surface of a building. The reciprocal top edge and bottom edge configuration may allow face to face engagement to provide an environmental barrier between them. The barrier may at least inhibit water ingress. The fastening flange may retain the top edge of each respective panel of the assembly with the bottom edge retained by engagement with the top edge of an adjacent panel. A bottom panel of the assembly may engage a base retainer strip configured to match an upper edge. The retainer strip may have a fastening flange.
Further in accordance with aspects of the present invention there is provided a method of forming an insulation panel as described above wherein:
The foam may typically be liquid or a preformed section cut to fit. A liquid foam is injected into the cavity and allowed to rise and cure to the space available.
The forming process may be to separately moulded panel parts respectively for the front panel and for the rear panel or pressing (hot or cold) panel parts for the front panel and the rear panel with the panel parts secured together by closures to provide the cavity. The closures may be integrally formed with the respective panel or be separate fixings or both.
The panel may be stabilised and/or constrained within a mound when liquid insulation material is injected and allowed rise and cure; alternatively pre-manufactured insulation may also be cut and fit into the space. The panels may be of the same width or of different widths in the same assembly.
Further in accordance with aspects of the present invention there is provided a method of providing an insulation surface to a building using insulation panels as described above in which:
Embodiments of aspects of the invention will now be described by way of example only and with reference to the accompanying drawings listed below:
Aspects of the present invention can provide the following benefits:
It should be noted that the panels are shown in the figures are of shorter length than would be expected to fit the page so proportioning is not accurate but can be important with regard to proper presentation of the insulation panels in use. The panels are capable of being produced in any length as required and suitable for transportation and are likely to be manufactured in a length suitable for the width for the average home in the country of production.
An insulation panel in accordance with aspects of the present invention offers benefits which overcome some shortcomings of current systems.
An insulation panel presented according to aspects of the present invention considers the requirements for exterior wall insulation systems that require relatively low labour costs, short installation times, installed in almost any weather, on most types of buildings, provides high insulation performance and a significantly low cost system which creates an attractive payback period and aesthetically pleasing building facade for the consumer.
The panel relating to the invention is factory manufactured composite structure that provides weather proof insulation, that is modular in its form and quickly attaches directly to the building wall, is tessellating together with similar insulation panels attached either vertically, horizontally, or diagonally, thereby creating a weather proof exterior envelope around the existing building structure, irrespective of its shape, size and location in an aesthetically pleasing manner.
The insulation of the panel, which is capable of industrial, commercial and residential application, is created through the shape of the panel made from a thermoplastic polymer such as Polyvinyl chloride or alternative, the manner in which it closely connects with other panels. The thermal insulating value of the panel can be derived from any material with insulating properties such as expanding liquid foam, or bonded expanded polystyrene beads, but can also utilise recycled material which have thermal qualities and can also be used in the panel due to the unique characteristic of space between the panelling; for example plastic sheets or crushed newspaper will provide some level of thermal performance.
The panel as described in the invention is an encapsulated unit, which can be strengthened by horizontal internal bridging but an open cavity has advantages with regard to filling and loading with insulation material, capable of sealing the insulating material at every face of the structure, although it may be manufactured with no covering on the side facing of the panel; these can be connected together with a connecting over flange at any needed end during the installation process; the resulting installation is therefore impervious to moisture at all faces and unaffected by climatic conditions.
The panels are designed in such a manner that they can easily be installed by using mechanical means such as drilled holes in to the walls fitted with plastic wall plugs where the installation section of the panel will be drilled into which metal screws secure the panel onto the required wall of the building directly or on top of battens attached to the particular wall, where the panels are cut to fit corners, angles, around windows, doors and architectural elements of a building by relatively low skilled installers; once fitted with trimming sections, the installation will be neat, tidy, secure and perform as a highly insulating addition to the building structure.
The trimming sections will be the additional elements of the system that will allow the panels to be cut to fit the buildings walls allowing the edge of the panels to be covered, the corners to be neatly capped, the window and door frames to be neatly finished, preserving the thermal insulating capabilities of the system, keeping it weather tight and reducing any potential areas of thermal bridging.
The manufacture of the insulation panel uses existing manufacturing processes and the invention allows it to be created with a number of facades, colours, textures and designs; these may include panels in a matt black, gloss red, textured stone, shingles, light brown wood effect or plain white, with further adjustment to the shape of the outer face of the panel to have a contoured shape similar to a log cabin, tiled wall, brick or stone wall while maintaining full insulation properties, by changing the production mould or dye and changing the colour or aesthetically different materials the production process.
The completed structure forms a semi-permanent external insulation system that can be removed at any point or replaced as required, with very little impact on the building; this aspect of the invention allows for the building structure to be changed with little interruption from the insulation system.
The shape of the panel is designed to create an aesthetically pleasing weatherproof external envelope around the existing facade of the building being installed upon, allowing rainwater to run off, permitting moisture from the inside to escape but not allowing any moisture to enter the building facade.
The thermal properties of the panel is a function of its width from the back outwards and the depth from top to bottom, these two planes can be adjusted through the production process to create slim line panels of relatively modest insulation value all the way to much thicker and deeper panels that have much higher thermal values depending on client needs.
Although many insulating materials could be used, the most suitable materials are phenolic, polyisocyanurate, or polyurethane foam, which offer high insulation performance, strength, being light in weight, chemically stable and weather imperviable at feasible costs; these may be replaced as the material of choice by the development of new higher performance and lower cost insulant in the future which the invention could incorporate in the production process at that time.
The invention described herein can be seen as the base design having flexibility to allow the design to be adjusted to allow the thermal insulating capabilities to be varied to meet the specific demand of the local climate; for example by doubling the depth of the panel from back to front will increase the insulating capacity of the panel and by increasing the height of the panel from top to bottom, it will not only reduce the number of panels to be attached for a given area, but will also reduce the number of micro gaps that could allow heat to escape the original outer envelope through the insulated panels to the outer atmosphere.
Aspects of the present invention in particular provide the following advantages:
As indicated above the present invention as depicted in
The top edge or end 4 and bottom edge or end 5 are reciprocally shaped so that the angle of slope, length and other features are substantially reciprocal images of each other except with regard to location or keying features 10, 11 which inter-engage with each other and a stepped or lip front most configuration 12 with shaping 12a, 12b to act as a wet and/or weather lip for an association of panels 1 in use in a stack edge to edge 4, 5 about a joint between them. In such circumstances when the edges 4, 5 are arranged in abutment the slopes of the edges 4, 5 mean that water egress towards the rear of the panel 1 is restricted by a need for action against gravity. The depth of the insulation panel 1 will be defined to provide adequate space for the insulation material 7 and so thermal insulation function but also sound proofing if that is a factor. The keying features 10, 11 will help lock the panel to panel association towards a front side of an assembly and as illustrated will tend to take the form of an interference fit between a strip or rail 11 and a grip recess 10.
Insulation panels 1 in accordance with aspects of the present invention form a cavity 6 from generally two parts 1a, 1b to allow an extrusion or moulding process and method to be conveniently used. Thus parts 1a, 1b will be appropriately formed to provide respectively in one part 1 a the front surface 2 and edges 4, 5 whilst in the other part 1b the rear surface is formed with appropriate interference and normally snap fit structures 13, 14 to hold the parts 1a, 1b together to form a structural panel 1 in use which will normally be reinforced by the injection and location of the insulation material 7 (
Within the cavity 6 it will be noted that keying or locating interference elements or features 15 are normally provided so that the insulation material is keyed and anchored within the cavity in use. In such circumstances the insulation material may not move as much with thermal cycling and aging whilst the panel 1 is secured to a building structure. As described above the cavity 6 may also have reinforcing structures which extend across the cavity typically between internal sides of the surfaces 2, 3 but also possibly to brace corners and other parts of the insulation panel 1 to provide structural integrity. These reinforcing structures will act with features 15 to again stabilise the insulation material in use and provide more performance sustainability for the panel 1 in use. In any event the features 15 as well as reinforcing structures will act within the insulation material 7 will act to hold the insulation material in constant connection with the interiors of the panels front face 2 and rear face 1a.
The materials used to provide the parts 1a, 1b and insulation material 7 are described above and generally the same materials will be used for both parts 1a, 1b for ease of specification and manufacture. It will be understood with such consistency of materials that issues of variations in physical performance e.g. variation in expansion and contraction will be at least reduced. However, it will be understood where possibly greater specification of materials may give better performance then different materials may be used. For example it will be understood that the front or outer part 1a will be exposed to more weathering than substantially protected or sheltered part 1b so a material more suited to such weathering may be chosen for part 1a compared to part 1b which will provide more of the basic structural strength and anchoring to a wall surface of a building in use. It will also be noted that the front surface 2 will be essentially that presented externally when in use as a stack of panels attached to a building as insulation cladding so the surface 2 at least of the part 1a may be rendered decorative in terms of colour and/or texture or made more receptive to application of coatings and treatments to provide such decorative features.
The fastening flange 8 is a core feature of aspects of the present invention. The flange allows the panel 1 to hang and be appropriately presented without fastenings passing through the cavity 6 including insulation materials 7. Such fastenings would provide thermal bridges and also transmission paths for moisture towards the surface of the building which may manifest itself as damp patches within in the building and possibly thermal ice fretting/erosion at the fastening attachment site to the building structure. The flange 8 is sufficiently strong to take the weight of the panel 1, is configured in the panel 1 when formed such that when assembled with other panels 1 in use the flange 8 and so fastenings are covered and protected from weathering/moisture. The flange 8 may be thicker than the other wall parts—surfaces 2, 3 and ends/edges 4, 5 to provide the desired strength. The flange 8 will normally be co-extruded with a part of the panel 1 so will be formed of the same material. In such circumstances the fastening flange 8 will be substantially rigid as with the remainder of the panel 1 to form the cavity 6. As an alternative the flange 8 may be more flexible to allow pivoting about the flange 8 in use which may help installation and maintenance but even if flexible the flange will not extend so that a degree of structural surety of position is provided—the panel 1 even with the weight of insulation material will not sag or significantly shift in use at least over a relatively short period of time of a few years.
The insulation material provides the function of the panel 1. Normally as described above a building surveyed prior to assembly and installation of panels 1. In such circumstances the panels 1 will normally be formed off-site and may be of standard sizes and widths so that the number of extrusion dies and moulds needed by a manufacturer is limited to acceptable numbers. The insulation material may be foam or fibrous material and will be located or injected into the cavity 6. The insulation material 7 is normally stabilised to provide a structural block within the cavity 6 by nature or drying/curing of the material itself or a binding component mixed with insulation material. The panel 1 may be initially formed to provide the cavity 6 then located in a constraint jig or mould when the insulation material is located or injected into the cavity so the substantive structural integrity of the panel 1 is maintained. However, even though the formed panel parts 1a, 1b along with insulation material may be relatively light in weight the manipulation of large lengths of panels 1 in use may be difficult. It will be appreciated that a desire as outlined above is ease of installation and assembly of panels 1 in a stack to the exterior of a building so the need for specialist handling and lifting machinery may be contrary to this desired approach. One solution is to assemble the panels 1 to a building structure with the cavity empty or only partially filled with insulation material so that the remainder of the insulation material can be located or injected on site to individual requirements and tastes but it will be appreciated in such circumstances care must be taken so that the panel does not unduly deform or bulge. Such an approach may also be used to facilitate the abutment and location of the edges 4, 5 into association in that the strip or rib 11 in the bottom edge or end 5 may be forced into better association with the grip cavity 10 of a top edge or end 4 in the panel 1 below by inherent flexing as the insulation material is forced into the cavity 6. The insulation material 7 may be under slight compression in any event to aid location retention in the cavity.
As indicated above the fastening flange 8 allows the panel 1 to essentially hang down from fastenings though to a wall of a structure or building. In such circumstances if the flange 8 and the rear surface 3 are substantially contiguous then if the flange 8 has sufficient width particularly if substantially rigid then the flange 8 can ensure orientation and presentation of the panel 1 against the wall. It will be understood that normally the cavity 6 and panel 1 will be flat so the surface 3 will also be flat however it may be envisaged that the cavity 6 may be shaped for some reason but even with such shaping the rear surface 3 on the side against a building or structure will be flat. The cavity may be shaped for example with a wavy inner side to one or both of the surfaces 2, 3 to stabilise the insulation material therein or to provide some form of acoustic dampening as well as thermal insulation.
As described above the actual fastenings used to secure the panels 1 may be of a wide number of types including nails, screws and bolts. In order to provide reinforcement and further sealing the fastening flange 8 may include positions such as pre-prepared holes and donut rings and/or markings where fasteners should be located and used for proper installation of the panel 1 in use. It will be understood these positions may be determined upon manufacture of the standard panel or when a bespoke panel is specified then formed or cut. The positions may also be standard based upon the panel size and dimension and possibly with variations for the type of insulation material in or to be filled into the cavity and/or the type of surface of structure or building to which the insulation panel 1 will be fixed in use. The flange 8 as indicated above may be simply thicker that other parts of the panel 1 so rebated and chamfered holes may be cut to locate a screw or nail positions.
The fastening flange 8 will usually have a uniform width along the length of the panel 1 as this will be the easiest to manufacture by extrusion and moulding. The width as outlined above will normally be in proportion to the width of the panel 1 in terms of the front surface 2 and/or rear surface 3. It will be understood that the fastening flange 8 is to a degree exposed so may be damaged in storage and/or transportation to an installation site so care must be taken with its exposure to such damage. Although not ideal the top edge 4 or end may be formed as a separate and detachable strip secured by adhesive or otherwise to the remainder of the panel 1. In such circumstances a reciprocal bottom edge 5 or end strip may be formed and transported as a kit with in use abutment surfaces against each other to protect the flange 8 and possibly in a shell formed by the parts 1a, 1b to create the front surface 2 and back or rear surface 3 of the panel in use. The detachable edges 4, 5 could be secured to cavity sections of a panel of different widths.
The top edge 4 and bottom edge 5 are reciprocally shaped so with a set of panels regularly formed in such a manner the edges 4, 5 can abut each other in an assembled stack. The abutment surfaces of the top edge 4 and the bottom edge 5 are normally angled so that the angle in each is substantially consistent to the plane of the front surface 2 and the rear surface 3. An angle upward from front to back will provide an incline inhibiting rain and other moisture flow and wicking towards the rear and so the building or structure clad in the insulating panels 1. Such resistance may also be enhanced with lateral ribs and waves in the opposed abutment surfaces of the ends by reciprocal concave and convex shaping. In some circumstances it may also be possible to provide ends themselves which have reciprocally respective concave and convex surfaces. Nevertheless normally for ease of manufacture the ends will be flat and at an angle for simplicity of design and formation. The top 4 and bottom 5 ends may be formed from separate elements which may be assembled with the remainder of the panel on site or otherwise as required but this again may introduce complexity which it may be desirable to avoid so advantageously the top edge and/or the bottom edge may be integrally formed by moulding or extrusion or other processes as described above.
The front panel part 1a or surface 2 may have a lip or step 12b which extends beyond the lower edge of the panel 1. This will act to constraint outward deflection of the panel 1 in use generally mainly hung and secured by the fastening flange 8. However, also provided in the rear surface 3 is a recess 20 which may include a clip like arrangement 21 to engage in use the fastener portion 9 of the flange 8 to again provide some locational security and prevent outward deflection about the fastening flange 8 at the other end of the panel 1. The panel 1 in use should stay relatively flat and against a surface of a building or structure.
To provide additional strength should it be required as indicated above permanent and/or temporary brace elements may be provided to give reinforcement where required. These brace elements may be internal or external particularly at the junctions of the parts 1a, 1b to form the panel 1 and cavity 6. The brace elements formed and acting as separable elements can be made of other materials and thicknesses than that of the parts 1a, 1b whose structure may be constrained by the possibilities of moulding or extrusion or similar processes. In such circumstances tongue and groove type interference associations to form the cavity 6 and achievable by such forming processes can be reinforced by the brace elements. The joints may also be strengthened by adhesives and as indicated above the location and insertion of the insulating material.
It will be understood that the cavity 6 is generally closed to protect the insulation material 7 from weathering and to inhibit loosening. It will be understood that should the insulation material 7 become wet it will lose at least some of its thermal insulation properties and may swell bursting/cracking the panel 1. Trim elements will be used to provide such closure of the cavity 6. As will be described later such trim elements will also enable the panel to be adapted to accommodate such structures and features as down pipes and windows.
In some circumstances it may be desirable to provide some sort of heat indicative feature in the panel so that heat loss or gain can be seen. For example, if the panel where used to provide insulation to a shed in which temperature sensitive materials are stored, if the insulation material and/or parts of the front surface and possibly the rear surface forming the panel included a heat sensitive constituent and/or moisture colour change constituent, then an indication of the current status of the building for storage or occupation would be provided by the heat indicative feature. A moisture sensitive constituent which changes colour with moisture level may be included.
The insulation panels 1 of the present invention are designed to form cladding to a building so are assembled as a stack 100 one upon the other or side by side as illustrated in
As will be described later each panel 1 will be added to the stack of the assembly 100 from the base upward normally from an initial starter or base rail trim which emulates the top end 4 of a panel 1 without the cavity 6 and so insulation material 7 below. If the ends or edges 4, 5 of panels 1 are detachable then one of these top ends or edges 4 may form the starter or base rail trim to initiate a stack assembly 100 and another a bottom end or edge 5 used to terminate the stack 100 as required. In such circumstances although described as top 4 and bottom 5 edges and ends in a panel 1 in use these ends 4, 5 may be above or below each other in an assembled stack 100 of panels secured to a wall. Once secured to a wall the stack 100 of side-by-side panels 1 it will be understood that the insulation of that building or structure is greatly increased.
As indicated above the panels 1 will be stacked upwards one upon the other as required. The panels 1 once assembled will be expected to remain in position for a number of years and through weather seasons so will be designed with this in mind. However, there may be instances where maintenance is required so in accordance with aspects of the present invention the panels 1 can be removed one at a time from the up down or possibly only the front part 1a removed to expose the insulation 7 filling to the cavity 6. The insulation material filling 7 may remain in position located by the elements 15 or be removed/replaced to expose the rear panel part 1b. If the panel 1 is formed integrally then the parts 1a, 1b as depicted could not be separated but the whole panel could be removed to expose the building for maintenance and development. The ability to remove panels also will allow alternative decorative fronts and textures to be provided.
Within a building or structure there are likely to be windows and doors so as depicted in
Within a building or structure there are likely to be such features as a soil vent pipe and outflow pipes so as illustrated in
As outlined above insulation panels in accordance with aspects of the present invention are present in a stack from a base or ground up. In such circumstances the first row of insulation panels must be secured so that the bottom end or edge of the first layer of panels must be securely located; it will be appreciated that the top part of the panel will be secured by hanging from the fastening flange.
The trim 500 is robust and again formed by extrusion or mounding or similar process with reinforcing elements 501 for strength. The upper part 504 of the trim 500 emulates that of a top end or edge of an insulation panel and so is reciprocally shaped to that of the top and bottom ends or edges of panels. Thus when a panel is located on the trim 500 there is surface to surface abutment with normally a slope upwards from the front to the rear side of the panel. The trim 500 is secured with fasteners as with panels along and through a fastening flange. Towards the front side of the trim a grip recess 510 is provided like that as in an insulation panel to locate and secure that part of the panel in use.
It will be appreciated by those skilled in the art that any number of combinations of the aforementioned features and/or those shown in the appended drawings provide clear advantages over the prior art and are therefore within the scope of the invention described herein.
Number | Date | Country | Kind |
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1121553.0 | Dec 2011 | GB | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/GB2012/053145 | 12/14/2012 | WO | 00 | 6/13/2014 |