GB2570867A - Insulating panels, and building constructions comprising insulating panels - Google Patents

Insulating panels, and building constructions comprising insulating panels Download PDF

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Publication number
GB2570867A
GB2570867A GB1801292.2A GB201801292A GB2570867A GB 2570867 A GB2570867 A GB 2570867A GB 201801292 A GB201801292 A GB 201801292A GB 2570867 A GB2570867 A GB 2570867A
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GB
United Kingdom
Prior art keywords
sheet
insulating panel
insulating
low emissivity
air cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1801292.2A
Other versions
GB201801292D0 (en
Inventor
Brown Wayne
Broadhurst Steve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Expanding Solutions Ltd
Original Assignee
Expanding Solutions Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Expanding Solutions Ltd filed Critical Expanding Solutions Ltd
Priority to GB1801292.2A priority Critical patent/GB2570867A/en
Publication of GB201801292D0 publication Critical patent/GB201801292D0/en
Publication of GB2570867A publication Critical patent/GB2570867A/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • E04B1/806—Heat insulating elements slab-shaped with air or gas pockets included in the slab
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E04B2/28—Walls having cavities between, but not in, the elements; Walls of elements each consisting of two or more parts kept in distance by means of spacers, all parts being solid
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
    • E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
    • E04D13/1612—Insulation of the roof covering characterised by its integration in the roof structure the roof structure comprising a supporting framework of roof purlins or rafters
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/625—Sheets or foils allowing passage of water vapor but impervious to liquid water; house wraps
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/7654—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/38—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)

Abstract

An insulating panel 91 comprising a body formed of an insulating material, at least one air cavity in the body, and a low emissivity layer 96 which forms a surface of the air cavity. The low emissivity layer may be a reflective foil. The body may have a first sheet 92 of insulating material having raised portions 93a, 93b which form at least one side of the cavity. The body may have a second sheet 94 of insulating material having raised portions 95a, 95b positioned on the raised portions of the first sheet. The reflective foil layer may be positioned between the first and second sheets to form air cavities between the reflective foil layer and the first and second sheets. The low emissivity layer may be a metallic coating. The insulating material may be expanded polystyrene. Also claimed is a building construction comprising at least one insulating panel comprising a body formed of an insulating material. The building construction comprises at least one air cavity, and a low emissivity layer, the at least one insulating panel forming and low emissivity layer forming surfaces of the air cavity. The building construction may be a wall or roof.

Description

Iinsulating panels, and building constructions comprising insulating panels
Field of the Invention
The present invention concerns insulating panels, and building constructions comprising insulating panels. In particular, the present invention concerns insulating panels and building constructions incorporating low emissivity layers, for example foil layers.
Background of the Invention
It is often desirable to reduce the heat lost through the building constructions such as walls, rooves and the like. Heat loss occurs due to heat transfer, which can occur in a number of ways. Heat transfer can occur due to convection, i.e. the movement of air. This can be limited by airtightness, suitable design and effective construction. Heat transfer can also occur due to thermal conduction. This can be limited by the use of suitable materials with low thermal conductivity, and in particular, insulating panels may be used.
The present invention seeks to provide insulating panels, and building constructions comprising insulating panels, that further reduce heat loss.
-2Summary of the Invention
In accordance with a first aspect of the invention there is provided an insulating panel for a building construction, comprising:
a body formed of an insulating material;
at least one air cavity in the body; and a low emissivity layer;
wherein the low emissivity layer forms a surface of the air cavity.
By providing a low emissivity layer, the reduction heat loss through the insulating panel is further improved. The insulating material of the body of the insulating panel reduces the heat transferred due to thermal conduction, as does the at least one air cavity (as air has low thermal conductivity). When used appropriately in a building construction, the insulating panel may also reduce the heat transferred due to convention, by providing part of an airtight design. The low emissivity layer then advantageously further reduces heat loss through the insulating panel, by reducing the heat transferred due to thermal radiation. This is because, as discussed later below, the low emissivity layer reduces the heat transferred as radiation across the air cavity, by reflecting the radiation back to the surface from which it originated.
The insulating panel may comprise multiple foil layers.
Advantageously, the body comprises a first sheet of insulating material having one or more raised portions, and the raised portions form at least one side of the air cavity, and a surface of the first sheet forms a surface of the air cavity. The raised portions provide the air cavity in the insulating panel in a convenient and simple manner. The body may further comprises a second sheet of insulating material positioned on the one or more raised portions of the first sheet. This provides the air cavity between the first sheet and the second sheet. The second sheet of insulating material may have one or more raised portions, and the one or more raised portions of the second sheet are positioned on the one or more raised portions of the first sheet.
-3The surface of the first sheet forming a surface of the air cavity may comprise the low emissivity layer. In this case, the air cavity may be an indentation on the surface of the body of the insulating panel, so a second surface of the air cavity opposite the low emissivity layer is provided by an element of the building construction, when the raised portions of the first sheet are placed against the surface of the element.
Alternatively, the surface of the second sheet positioned on the one or more raised portions of the first sheet may comprise the low emissivity layer. Alternatively again, the low emissivity layer may be positioned between the first sheet and the second sheet to form at least one air cavity between the low emissivity layer and the first sheet, and at least one further air cavity between the low emissivity layer and the second sheet.
The low emissivity layer may be a coating applied to a surface of the body. The low emissivity layer may be metallic, and/or may have a metallic surface. The low emissivity layer may be a foil sheet. The low emissivity layer may in addition be a vapour control layer, i.e. be impermeable to water vapour so as to prevent moisture.
Preferably, the low emissivity layer has an emissivity of 0.1 or less. More preferably, the low emissivity layer has an emissivity of 0.5 or less. More preferably, the low emissivity layer has an emissivity of 0.03 or less. More preferably, the low emissivity layer has an emissivity of 0.01 or less.
The insulating material may be an insulating polymer. Preferably, the insulating polymer is expanded polystyrene. Alternatively, the insulating panels may be formed of any material from the group of extruded polystyrene, polyurethane or polyisocyanurate. The material may have a thermal conductivity of 0.050W/mK or below. The material may have a thermal conductivity of 0.040W/mK or below. Preferably, the material has a thermal conductivity of 0.036W/mK or below. Advantageously, the material has a thermal conductivity of 0.031W/mK or below. The material may have a thermal conductivity of 0.021W/mK or below. The insulating material may be low thermal
-4conductivity expanded polystyrene of thermal conductivity of 0.030W/mK. It will be appreciated that other suitable insulating materials could be used.
In accordance with a second aspect of the invention there is provided a building construction comprising at least one insulating panel as described above.
In accordance with a third aspect of the invention there is provided a building construction comprising:
at least one insulating panel comprising a body formed of an insulating material;
at least one air cavity; and a low emissivity layer;
wherein at least one insulating panel forms a surface of the air cavity, and the low emissivity layer forms a further surface of the air cavity.
In this way, the air cavity is formed between the insulating panel and the low emissivity layer, and similarly to above the low emissivity layer reduces the heat transferred as radiation across the air cavity, by reflecting the radiation back to the surface from which it originated, i.e. the surface of the insulating panel.
Advantageously, the body of the at least one insulating panel comprises a first sheet of insulating material having one or more raised portions, and wherein the raised portions form at least one side of the air cavity, and wherein a surface of the first sheet forms a surface of the air cavity. In this case, the air cavity may be an indentation on the surface of the body of the insulating panel, with the low emissivity layer providing the second surface of the air cavity when the raised portions of the first sheet are placed against the low emissivity layer.
The low emissivity layer may be a coating applied to a surface of a building element of the building construction. The low emissivity layer may be metallic. The low emissivity layer may be a foil sheet.
-5The insulating material may be an insulating polymer. The insulating polymer may be expanded polystyrene.
The building construction may be a wall. The wall may be a timber frame wall or a cavity wall, for example. Alternatively, the building construction may be a roof. The at least one insulating panel may then be a rafter board that is positioned between rafters of the roof.
It will of course be appreciated that features described in relation to one aspect of the present invention may be incorporated into other aspects of the present invention.
Description of the Drawings
Embodiments of the present invention will now be described by way of example only with reference to the accompanying schematic drawings of which:
Figure la shows an insulating panel in accordance with an embodiment of the invention;
Figure lb shows an insulating panel in accordance with a related embodiment of the invention;
Figure lc shows a cavity wall construction comprising the insulating panel of Figure lb;
Figure 2a shows an insulating panel in accordance with another embodiment of the invention;
Figure 2b shows a roof construction comprising the insulating panel of Figure 2a;
Figure 3a shows an insulating panel in accordance with another embodiment of the invention;
-6Figure 3b shows a roof construction comprising the insulating panel of Figure 3a;
Figure 4 shows an insulating panel in accordance with another embodiment of the invention;
Figure 5 shows a timber frame wall construction in accordance with another embodiment of the invention; and
Figure 6 shows a timber frame wall construction in accordance with another embodiment of the invention.
Detailed Description
An insulating panel in accordance with an embodiment of the invention is shown in Figure la. The insulating panel 1 comprises a body 2, formed of a sheet of expanded polystyrene of width 450mm and length 1200mm. On the long edges of the upper surface of the body 2 are raised portions 3, or ribs, so providing a recess on the upper surface of the body 2 between the raised portions 3. The height of the sheet of expanded polystyrene, including the raised portions 3, is 80mm. The surface of the body 2 between the raised portions 3 is coated with a reflective foil layer 4.
It will be appreciated that similar insulating panel of different dimensions could be used in accordance with other embodiments of the invention.
An insulating panel in accordance with a related embodiment of the invention is shown in Figure lb. Again, the insulating panel 11 comprises a body 12 formed of a sheet of expanded polystyrene of width 450mm and length 1200mm. However, in the present embodiment there are raised portions 13a on the short edges of the upper surface of the body 12, and in addition there is a further raised portion 13b across the middle of the upper surface of the body 12, parallel to the raised portions 13a. In this way, two recesses are provided on the upper surface of the body 12, each between the
-7raised portion 13b and one of the raised portions 13a. The surfaces of the body 12 between the raised portions 13a and 13b is coated with a reflective foil layer 14.
A cavity wall construction comprising the insulating panel 11 is shown in Figure lc. The cavity wall construction 21 comprises an outer leaf 22 and an inner leaf 23. The insulating panel 11 is positioned between the outer leaf 22 and inner leaf 23, with the raised portions 13a and 13b of the insulating panel 11 touching the inside surface of the inner leaf 23. In this way, air cavities 24 are formed between the insulating panel 11 and the inside surface of the inner leaf 23, with the reflective foil layer 14 of the insulating panel 11 providing the surface of the air cavities 24 opposite the inner leaf 23.
With the insulating panel 11 and cavity wall construction 21 described above, as well as the insulating panel 11 reducing heat loss through the cavity wall construction 21 due to the insulating effect of the expanded polystyrene of the body 12 reducing the conduction of heat, in addition the reflective foil layer 14 reduces heat lost by radiation across the air cavities 24. In particular, heat radiation from the inside surface of the inner leaf 23 across an air cavity 24 can be reflected back to the inner leaf 23 by the reflective foil layer 14.
It will be appreciated that the insulating panel 1 could be provided in the cavity wall construction 21 in a similar fashion to the insulating panel 11, with similar effect.
The rate of transfer of heat energy by radiation depends upon various factors, including the emissivity of the surface onto which the heat energy is radiated. Emissivity is the relative ability of a surface to reflect radiation, in informal terms the shininess of a surface. The emissivity of a surface is usually given as a value between 0 and 1, where a surface with an emissivity of 0 and would be a perfect reflector that reflected all radiated heat energy, and a surface with an emissivity of 1 would a perfect absorber that did not reflect any radiated heat energy. The reflectivity of a material is directly inverse to the emissivity. The lower the emissivity, the better the material is at limiting
-8radiative heat transfer, as it reflects the heat energy rather than absorbing it. For example, a surface with an emissivity of 0.05, would reflect 95% of radiated heat energy.
Foil has a low emissivity. Thus, having the reflective foil layer 14 on a surface an air cavity 24 improves its thermal resistance. This can significantly improve the insulating properties (U-value) of the cavity wall construction 21, or alternatively allow a thinner insulation to be used to achieve the same U-value.
An insulating panel in accordance with another embodiment of the invention is shown in Figure 2a. The insulating panel 51 comprises a body formed of a first sheet 52 and a second sheet 54, each of expanded polystyrene and with width 550mm and length 1200mm. The first sheet 52 has a height of 50mm and the second sheet 54 has a height of 30mm, so that the insulating panel 51 as a whole has a height of 80mm.
On the short edges of the surface of the first sheet 52 facing the second sheet 54 are raised portions 53a, and there is a further raised portion 53b across the middle of the first sheet 52, parallel to the raised portions 53a. In this way, two air cavities 56 are provided between the first sheet 52 and the second sheet 54, each between the raised portion 53b and one of the raised portions 53a.
The surface of the second sheet 54 facing the first sheet 52 is coated with a reflective foil layer 55, and in addition the opposite surface of the second sheet 54 is coated with a reflective foil layer 57.
A roof construction comprising the insulating panel 51 is shown in Figure 2b. The roof construction 61 comprises a plasterboard lining 62 fixed to rafters 63. The insulating panel 51 is positioned between the rafters 63, with the second sheet 54 nearest to but a distance away from the plasterboard lining 62. In this way, an air cavity 64 is formed between the insulating panel 51 and the plasterboard lining 62, with the surface of the air cavity 64 provided by the insulating panel 51 having the reflective foil layer 57. In addition, the air cavities 56 of the insulating panel 51 are also present, again having a surface with a foil layer, in this case the reflective foil layer 55.
-9An insulating panel in accordance with a related embodiment of the invention is shown in Figure 3a. The insulating panel 71 comprises a body formed of a first sheet 72 and a second sheet 74, each again of expanded polystyrene and with width 550mm and length 1200mm, with the first sheet 72 having a height of 50mm and the second sheet 74 having a height of 30mm, so that the insulating panel 71 as a whole has a height of 80mm.
In the present embodiment, on the long edges of the surface of the first sheet 72 facing the second sheet 74 are raised portions 73, so that an air cavity 76 is formed provided between the first sheet 72 and the second sheet 74 between the raised portions 73.
Again, the surface of the second sheet 74 facing the first sheet 72 is coated with a reflective foil layer 75, and in addition the opposite surface of the second sheet 74 is coated with a reflective foil layer 77.
A roof construction comprising the insulating panel 71 is shown in Figure 3b. The roof construction 81 comprises a plasterboard lining 82 fixed to rafters 83, on the other side of which is a layer of roofing felt 84. Again, the insulating panel 71 is positioned between the rafters 73, with the second sheet 74 nearest to but a distance away from the plasterboard lining 72, so that an air cavity 85 is formed between the insulating panel 71 and the plasterboard lining 82, with the surface of the air cavity 85 provided by the insulating panel 71 having the reflective foil layer 77. In addition, the air cavity 76 of the insulating panel 71 is also present, again having a surface with a foil layer, in this case the reflective foil layer 75. Finally, while there is also an air gap between the insulating panel 71 and the layer of roofing felt 84, this is open to outside air to allow ventilation of the roof construction 81, so does not aid in the insulation of the roof construction 81.
As with previous embodiments, in both embodiments the air cavities with reflective foil layer surfaces reduce heat loss, by reducing heat transferred by thermal radiation.
-10An insulating panel in accordance with another embodiment of the invention is shown in Figure 4. The insulating panel 91 comprises a body formed of a first sheet 92 and a second sheet 94, each of expanded polystyrene. Both the first sheet 92 and a second sheet 94 have parallel raised portions 93a and 95a at their edges respectively, and parallel raised portions 93b and 95b respectively between their edges. The parallel raised portions 93a and 95a are positioned against each other, as are the parallel raised portions 93b and 95b, so creating air cavities between the first sheet 92 and a second sheet 94.
However, the parallel raised portions 93a, 95a, 93b and 95b do not touch, as a reflective foil layer 96 is sandwiched between them. In this way, two air cavities are formed between each pair of adjacent raised portions, one between the reflective foil layer 96 and the first sheet 92 and one between the reflective foil layer 96 and the second sheet 94. In this way, sets of pairs of air cavities are formed, each having one surface with a reflective foil layer.
Again, as with previous embodiments the air cavities with reflective foil layer surfaces reduce heat loss, by reducing heat transferred by thermal radiation.
A timber frame wall construction in accordance with another embodiment of the invention is shown in Figure 5. The timber frame wall construction 101 comprises a brick layer 104, which not structural but merely decorative as well as providing weatherproofing. The structural part of the timber frame wall construction 101 is provided by vertical timber studs 108, on each side of which are fixed wooden sheathing boards 105 and 111, to provide a box structure. The sheathing boards 105 are positioned inside the brick layer 104, with a vapour control layer 106 on the surface of the sheathing boards 105 adjacent to the brick wall 104. The opposite surface of the sheathing boards 105 has a reflective foil layer 107. Insulating panels 102, which are described in more detail below, are positioned between the timber studs 108.
- 11 The sheathing boards 111 are positioned on the other side of the timber studs 108, and again there is a further reflective foil layer 109 between the sheathing boards 111 and the timber studs 108. There is again a further vapour control layer 110, but in this case on the side of the sheathing boards 111 adjacent to the timber studs 108, between the sheathing boards 111 and the further reflective foil layer 109.
The insulating panels 102 are formed of expanded polystyrene, and have on the side facing the brick layer 104 horizontal raised portions 103a, and on the side facing the sheathing boards 111 corresponding horizontal raised portions 103b. In this way, air cavities are formed between the insulating panels 102 and the reflective foil layer 106, and in addition between the insulating panels 102 and the reflective foil layer 109.
A timber frame wall construction in accordance with a related embodiment of the invention is shown in Figure 6. In this embodiment, the timber frame wall construction 121 again comprises a brick layer 104, within which is are sheathing boards 105 fixed to timber studs 108, with a vapour control layer 106 and reflective foil layer 107. There are insulating panels 122 positioned between the timber studs 108, described in more detail below. On the other side of the timber studs 108 are further sheathing boards 111, but while the sheathing boards 111 have a further vapour control layer 110, there is no further reflective foil layer.
The insulating panels 122 are again formed of expanded polystyrene and have on the side facing the brick layer 104 horizontal raised portions 123, so that air cavities are formed between the insulating panels 123 and the reflective foil layer 106. However, the side facing the sheathing boards 111 is flat, so that no air cavities are formed.
Again, as with previous embodiments, with both embodiments the air cavities with reflective foil layer surfaces reduce heat loss, by reducing heat transferred by thermal radiation.
- 12 While the present invention has been described and illustrated with reference to particular embodiments, it will be appreciated by those of ordinary skill in the art that the invention lends itself to many different variations not specifically illustrated herein.
The skilled person will in particular appreciate that the insulating panels could be shaped and/or dimensioned in various alternative ways while still being in accordance with the invention. Further, the raised portions used to form the air cavities could be shaped, formed or dimensions in various alternative ways, to give just one example as a plurality of raised columns.
The skilled person will appreciate that while embodiments have described in which the there is a reflective foil layer, the invention is equally applicable to low emissivity layers of other materials, which may or may not comprise foil, and may or may not be metallic.
The skilled person will also appreciate that features of the above embodiments could be combined, to give just one example the insulating panel of Figure 4 could be 15 used in a timber frame wall construction of the type shown in Figure 5.
Various other modifications which are within the scope of the invention will be apparent to the skilled person.

Claims (22)

Claims
1. An insulating panel for a building construction, comprising:
a body formed of an insulating material;
at least one air cavity in the body; and a low emissivity layer;
wherein the reflective foil layer forms a surface of the air cavity.
2. An insulating panel as claimed in claim 1, wherein the body comprises a first sheet of insulating material having one or more raised portions, and wherein the raised portions form at least one side of the air cavity, and wherein a surface of the first sheet forms a surface of the air cavity.
3. An insulating panel as claimed in claim 2, wherein the body further comprises a second sheet of insulating material positioned on the one or more raised portions of the first sheet.
4. An insulating panel as claimed in claim 3, wherein the second sheet of insulating material has one or more raised portions, and the one or more raised portions of the second sheet are positioned on the one or more raised portions of the first sheet.
5. An insulating panel as claimed in any of claims 2 to 4, wherein the surface of the first sheet forming a surface of the air cavity comprises the reflective foil layer.
6. An insulating panel as claimed in claim 3, wherein the surface of the second sheet positioned on the one or more raised portions of the first sheet comprises the low emissivity layer.
7. An insulating panel as claimed in claim 4, wherein the low emissivity layer is positioned between the first sheet and the second sheet to form at least one air cavity between the low emissivity layer and the first sheet, and at least one further air cavity between the low emissivity layer and the second sheet.
8. An insulating panel as claimed in any of claims 1 to 6, wherein the low emissivity layer is a coating applied to a surface of the body.
9. An insulating panel as claimed in any of claims 1 to 8, wherein the low emissivity layer is metallic.
10. An insulating panel as claimed in claim 9, wherein the low emissivity layer is a foil sheet.
11. An insulating panel as claimed in any preceding claim, wherein the insulating material is an insulating polymer.
12. An insulating panel as claimed in claim 11, wherein the insulating polymer is expanded polystyrene.
13. A building construction comprising at least one insulating panel as claimed in any preceding claim.
14. A building construction comprising:
at least one insulating panel comprising a body formed of an insulating material; at least one air cavity; and a low emissivity layer;
- 15 wherein at least one insulating panel forms a surface of the air cavity, and the low emissivity layer forms a further surface of the air cavity.
15. A building construction as claimed in claim 14, wherein the body of the at least one insulating panel comprises a first sheet of insulating material having one or more raised portions, and wherein the raised portions form at least one side of the air cavity, and wherein a surface of the first sheet forms a surface of the air cavity.
16. A building construction as claimed in claim 14 or 15, wherein the low emissivity layer is a coating applied to a surface of a building element of the building construction.
17. A building construction as claimed in any of claims 14 to 16, wherein the low emissivity layer is metallic.
18. A building construction as claimed in claim 17, wherein the low emissivity layer is a foil sheet.
19. A building construction as claimed in any of claims 14 to 18, wherein the insulating material is an insulating polymer.
20. A building construction as claimed in claim 19, wherein the insulating polymer is expanded polystyrene.
21. A building construction as claimed in any of claims 14 to 20, wherein the building construction is a wall.
22. A building construction as claimed in any of claims 14 to 20, wherein the building construction is a roof.
GB1801292.2A 2018-01-26 2018-01-26 Insulating panels, and building constructions comprising insulating panels Withdrawn GB2570867A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747651A (en) * 1954-12-01 1956-05-29 Lighter Stephen Method of making building insulation and product
FR2272236A1 (en) * 1974-05-24 1975-12-19 Czerczuk Jerzy Heat insulating panel with stack of plates - has recesses in one face of plate opposite reflective surface of next plate
EP0234118A1 (en) * 1985-12-18 1987-09-02 Lucio Lombardozzi Improved thermal panel
WO2005014945A1 (en) * 2003-08-12 2005-02-17 Frederick Michael Miniter A thermally insulating panel & wall constructed therefrom
WO2013010044A1 (en) * 2011-07-13 2013-01-17 White Arthur Paul Green star panel system
CN204983465U (en) * 2015-05-21 2016-01-20 绵阳沃升节能科技有限公司 Polyurethane heat preservation composite board

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747651A (en) * 1954-12-01 1956-05-29 Lighter Stephen Method of making building insulation and product
FR2272236A1 (en) * 1974-05-24 1975-12-19 Czerczuk Jerzy Heat insulating panel with stack of plates - has recesses in one face of plate opposite reflective surface of next plate
EP0234118A1 (en) * 1985-12-18 1987-09-02 Lucio Lombardozzi Improved thermal panel
WO2005014945A1 (en) * 2003-08-12 2005-02-17 Frederick Michael Miniter A thermally insulating panel & wall constructed therefrom
WO2013010044A1 (en) * 2011-07-13 2013-01-17 White Arthur Paul Green star panel system
CN204983465U (en) * 2015-05-21 2016-01-20 绵阳沃升节能科技有限公司 Polyurethane heat preservation composite board

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