CA1146331A - Insulating foam building panel and method of construction utilizing such panels - Google Patents
Insulating foam building panel and method of construction utilizing such panelsInfo
- Publication number
- CA1146331A CA1146331A CA000372793A CA372793A CA1146331A CA 1146331 A CA1146331 A CA 1146331A CA 000372793 A CA000372793 A CA 000372793A CA 372793 A CA372793 A CA 372793A CA 1146331 A CA1146331 A CA 1146331A
- Authority
- CA
- Canada
- Prior art keywords
- heat insulating
- panels
- constructing
- core
- layer
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title abstract description 15
- 239000006260 foam Substances 0.000 title description 6
- 239000000463 material Substances 0.000 claims abstract description 84
- 239000006261 foam material Substances 0.000 claims abstract description 31
- 230000005855 radiation Effects 0.000 claims abstract description 19
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims description 29
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 239000011087 paperboard Substances 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 9
- 239000010426 asphalt Substances 0.000 claims description 6
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000123 paper Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NSMXQKNUPPXBRG-SECBINFHSA-N (R)-lisofylline Chemical compound O=C1N(CCCC[C@H](O)C)C(=O)N(C)C2=C1N(C)C=N2 NSMXQKNUPPXBRG-SECBINFHSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
- E04D3/357—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation comprising hollow cavities
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
- E04D3/351—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation at least one of the layers being composed of insulating material, e.g. fibre or foam material
- E04D3/352—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation at least one of the layers being composed of insulating material, e.g. fibre or foam material at least one insulating layer being located between non-insulating layers, e.g. double skin slabs or sheets
Abstract
ABSTRACT OF THE DISCLOSURE
A heat insulating panel for use in construction of building structures such as a built-up roof. The heat insulating panel comprises first and second oppositely disposed surfaces with a core therebetween comprised of phenolic foam material. The first surface of the panel includes a thin layer of reflecting material over substantially the entire surface thereof to reduce the heat conveyed to the core due to sun radiation when the layer of reflecting material on the panel is exposed to sun radiation during construction of the building structure, This reduction in the heat conveyed to the core reduces curling or warping of the panel, before application of finishing materials, such as bituminous roofing material, over the panels. There is also disclosed a method of constructing a building structure with such heat insulating panels.
A heat insulating panel for use in construction of building structures such as a built-up roof. The heat insulating panel comprises first and second oppositely disposed surfaces with a core therebetween comprised of phenolic foam material. The first surface of the panel includes a thin layer of reflecting material over substantially the entire surface thereof to reduce the heat conveyed to the core due to sun radiation when the layer of reflecting material on the panel is exposed to sun radiation during construction of the building structure, This reduction in the heat conveyed to the core reduces curling or warping of the panel, before application of finishing materials, such as bituminous roofing material, over the panels. There is also disclosed a method of constructing a building structure with such heat insulating panels.
Description
I' ~14~i33~ .
INSULATING ~OAM BUILDING PANEL AND METHOD
OF CONSTRUCTION UTILIZING SUCH PANELS
BACKGROUND OF THE ~NV~NTION
The present invention relates to heat insulating panels which are comprised of a core of foam material for use in construction of heat insulated building stx-~ctures, such as built-up roofs, and more particularly to an improved heat insulating panel which manifests reduced curling under the heat of the sun.
The use of foamed plastic material for insulating purp~ses in building structures such as exterior or paxtition walls, bulk heads, ceilings, floors, storage tanks, and roof structures is well known as such foamed plastic materials have a very low thermal conductivity.
Such foam plastic materials having low thermal conductivity for instance may comprise phenolic foam material such as for example thermoset phenol formaldehyde materials.
ther low thermal conductivity foam materials comprise poly-styrene foam and/or urethane foam.
The foam materials used as roofing insulation have a density of about 1.5 to about 6 lb/~t3 so as to have sufficient strength to support persons and their equipment.
Typically, in such construction applications, the foam material is sandwiched b~tween a pair o~ protective skins, such as for example paper or paper composites.
The protec~iye s~ins serve as a convenient means of making the heat insulating panels,as well as ~o protect and maintain the integrity of the sandwiched foam material.
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' - . 1'' ' , .
~1~ti33~ l , .. -2-, One problem experienced with respect to such heat insulating panels of the prior art, such as roofing panels, is curling or warping of the panel. More particu-; larly, during the construction of built up roofs'employing such heat insulating roofing panels, the insulation panels are initially applied with a suitable adhesive.to the supporting structure, such as for example a corrugated steel roof deck, and'then bituminized roofing materials are applied over roof insulator panels to complete the roof structure. ~owever, from the time the panels are applied on the roof support structure until the application of.roofing materials thereover, the panels curl under the heat of the sun. For example, with two inch thick roofing panels constructed of open celled phenolic foam material sandwiched between a pair of paper media, c~rling of up to one inch can result under the heat of the sun on a very hot-day. ' It is desirable to minimize the amount of curling before the application of roofing materials thereon, in order to assure a reasonably flat support on which the com,ponents of the roofing membrane can be applied.
SUMMARY OF THE INVENTION
, In accordance with the present invention, there is . , provided an improved heat insulating panel, such as for example a roofing panel or an insulating sheathing panel, , which manifests reduced curling,or warpage of the panel after being applied on a supporting structure and before application of inishing materials thereover, and. .
as such'overco~es some of .the above discussed and other disadvantages.of the.prior art. More. particularly; in -accordance with the present invention, the improved heatinsulating panel comprises first and second oppositely disposed surfaces having a core therebetween comprised of heat insulating foam material. One of the oppositely ~ ~.4~331 '~
.,, , --~s-- , . .
disposed surfaces includes a thin l~yer of reflecting material over substantially the entire surface ther.eof to . reduce the heat conveyed to the core due to sun radiation .when the insulating panel is exposed to sun radiation during the construction or the renovation of a building structure.
In this regard, with many suitable foam materials, such as phenolic foam materials, which meet the mechanical.
and heat insulating performance requirements for building structures, the oam materials have a tendency to retain moisture which, given enough time, reaches equilibrium with.the atmospheric vapor partial pressure. ~or example, such foam materials may have : ....... the characteristic of absorbing and retaining up to 10~ moisture by weight when in an environment at 50% relative .humidity at room temperature.
Consequently, when the heat insulating panels are exposed to sun radiation after being applied to a supporting structure and before application of.the finishing materials thereover, the sun radiation may heat up the exposed surface of the panel. The resulting heat gradient established in the panel in turn may have the tendency to dri~e the moisture in the panels from the hot side of the panel to the relatively cool side of the panel, thereby causing shrin~age of the top exposed . -side of the panel and swelling and/or expansion of the lower side of the panel. .This can thus result in the aforemen-tioned curling--problem experienced in the prior art.
~owever, with the present invention, during the construction of the building structure, the heat insu-lating panels are adhered to the supporting structure. In this manner, the sun radiation is reflected away from the core of foam material, so that the temperature differential across the panel is reduced. Consequently, warpage or curling of the panels .
~'14633~
is substantially reduced so that the finishing materials such as roofing materials when the panels . are supported on a roof support structure, may be .easily applied over the surface of the heat insulating panels.
More particularly, and in accordance with the preferred embodiment, the thin layer of reflecting material comprises a thin layer of aluminum foil on the one surface of the panel. Still more particularly, the core of foam material is sandwiched between a pair of protective skins, each of which may comprise a corrugated medium of kraft, semi-chemical or similar paper having a liner attached to one side thereof remote from the core.
The aluminum foil is adhesively secured to the liner of one of the protective skins so as to substantially overlie one.of the outer surfaces of the panel. ~or example, the thin layer of aluminum foil may be secured with a neoprene adhesive or other high wet strength adhesive.
In accordance with another aspect of the present invention, there is disclosed a method of constructing a heat insulating structure which comprises of the steps of providing a plurality.of heat insulating.panels, each of which includes a thin layer of reflecting material over substantially the enti~e surface of one side of the panel, applying the plurality of heat insulating panels on a building support structure so that the layer of reflecting material on the.first surfaces is exposed to the sun radiation which may be present, whereby the thin layer of reflecting material serve-s to reduce heat conveyed to the core of the panel when sun radiation is present, and then applying at least one layer of finishing material ~1~6331 ~5--over the supported panels to thereby substantially cover the reflecting material. In this way, the problem of wa~ping ox curling of the panels prior to the application of the finishing material thereover is minimized.
These and other features and characteristics of the present invention will be apparent from the following detailed'description in which reference is made to the enclosed drawings which illustrate a preferred embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an enlarged cross-sectional elevation in perspective of a protective skin employed in the heat - insulating,panel in accordance with the present invention, with the protective skin having a thin layer of reflec!ting material applied to the outer surface thereof.
Figure 2 is an enlarged cross-sectional elevation in perspective of a heating insulating panel employing the ' ' protective skin shown in Figure 1 to define one surface thereof in accordance with the present invention.
Figure'3 is a cross-sectional elevation illustrating - ' the, heat insulating panel in accordance with the present ' invention supported on a roof supporting structure and having roofing material applied thereover to form a composite built-up roofing structure.
DETAILED-DESCRIPTION OF THE PREFERRED EMBODIMENT
.
Referring now to the drawings wherein like reference characters rep~esent like elements, there is shown in Figure 1 a protective skin 12 used in forming a composite heat insulating panel 10 in 'accordance with the present invention., T,he, protective skin 12 preferably comprises a single faced,corrugated paper board structure having a corrugated paper board medium 14 and an outer liner 16 adhered to the crest portio~s of the corrugated medium wlth a suitable adhesi~e, such as for example a wet 3~ r strength adhesive. A thin layer of reflecting material 20, which may for example comprise a thin sheet of aluminum foil, is in turn adhesively secured to the outer surface of the liner 16, i.e., the surface opposite to the surface adhered to the crest portions of the corrugated medium 14., The composite protective skin 12 may be provided with a plurality of pre-perf~rations 22 which pass through the' corrugated medium 14, the paper board liner 16 and the thin layer of reflecting material 20, for a purpose to be explained more fully hereinbelow.
There is shown in Figure 2 a heat insulating panel 10 in accordance with the present invention which is particularly userul as a roofing panel for construction of a built-up roof. The panel '10 comprises upper and lower protective skins 12, 13 having a core 24 of foam material therebetween such as for example phenolic foam material , which is dimensionally moisture sensitive. The upper protective skin 12 comprises a skin s'uch as shown in Figure 1 having a thin layer of reflecting material 20 thereon, whereas the lower protective,skin 13 is of a similar construction to the upper skin 12 with the exception that no layer of reflecting material need be 25- provided. Thus, it will, be noted in Figure 2 that the thin layer of reflecting material 20 need only be , provided on one of the outer surfaces of the formed heat insulating roofing panel 10, i.e., on the surface of the corrugated paper board facing away from the corrugated medium 14 and also away from the core'24 of the phenolic'oam material therebetween.
The upper and lower protective skins 12, 13 both preferably 'c,omprise single faced corrugated skins which provide for a good adhesion between skins 12, 13 and the phenolic foam material 24 therebetween as a result of the reduction of the amount of volatile materials accumulated between the skins 12, 13 during the manu-facturing process and of the foamable resin compound : , :
., . . _7_ passing through the,plurality of pre-perforatio,ns 22 ~rovided therein. ~he heat insulating bo~rd or panel 10 panel 10 may also be provided with a ~-plurality of post-perforations 26 which provide for an increased bond between the core 24 oP the foam, the protective skins 12, 13 and the roof supporting structure' 30 on one side of the heat insulating roofing panel 10 and the finishing roofing membrane 32 on the other side thereof by means of the roofing adhesive 34 and the roofing bitumen 26 which penetrates through the post-perforation holes during the process of forming the resulting roofing structure 40 (see Figure 3). In,.this , regard, the roofing material ~either the roofing adhesive 34 for securing the panels 10 to the roof supporting structure 30 or the bitumen 36 applied over the upper surface of the roofing panels 10 during the construction of the roof 40) will seep through the post-perforations 26 and form plugs 28 which provide a firm water resistant bond between the roofing materia.ls and ~he heat insulating roofing panel'or board 10.
~ ore particularly, during the construction of a built-~up roof;:40, a plurality of the heat insulating roofing panels 10 such as shown in Figure 2 are placed on a suitabLe roof,supporting structure 30,.which may for example compri'se a corruqated sheet steel support, the crests or pe'aks of which serve to sup'port the ro~fing panels 10. This is shown in cross-section in Figure 3.
33~ ~
~8--In this placement of the roofing panels 10 on the , corrugated support s'tructure 30, the panels 10 are , arranged in side by side relationship to cover the entire upper surface of the corrugated support structure 30.
Each of the panels 10 is arranged so that the thin layer of reflecting material 20 provided on the outer surface of one of the sides of the panels 10 faces away from the roof supporting structure 30, i.e., to face upwardly as shown in ~igure 3. Thus, it will be appreciated that .
the thin layer 20 of reflecting material will be exposed to any sun radiation which is present during this phase of the construction of the roof. ' -, lS Each of the roofing panels 10 may be suitably secured to the corrugated roof supporting structure 30 with any suitable adhesive 34, such as for example by roofing adhesive which may penetrate the bottom protective skin 13 through the post-perforations 26. This will form the ' 20 aforementioned plugs 28 in the lower side of the panel 10.
After the panels 10 have been laid up on the roof supporting structure 30 with the layers 20 of reflecting material facing the sun, one or more layers of roofing' materiai are then applied over the upper surfaces of the heat insulating panels 10. These roofing materials may comprise bitumino,us roofing materials such as alternating layers of asphalt 36, and asphalt saturated roofing felts 38, with the system then being gravelled over to complete the finished roof structure 40. In the embodiment shown 30 'in Figure 3, four layers each of asphalt 36 and ,38 are shown.- Ho,~ever, if desired, fewer or more layers could be provided.
As'noted in the Background of the Invention section, prior art he'at insulating roofing panels constructed of ,foam material have experienced problems in curling or warpage. This is believed in part to be due to the fact 114tj3;3 9 _ that the foam material has a tende~cy to absorb and retain moisture. For example, the foam materials may have a tendency to absorb approximately 10% moisture by weight . 5 when in an environ~ent at 50% relative humidity at room temperature. During the.construction process in the prior art in which the panels are initially placed on the roof support, and exposed and unprotected from the sun radiation, the heat from the sun radiation on the upper surface of the panels can cause a high temperature differential across the opposite surfaces which can have the effect of driving the moisture in the foam material away from the hot side towards the cold..side,.
and/or uneven evaporation of the moisture therewithin.
For example, up to a 55 F differential (140 F at the .. . upper surface and 95 F at the lower surface) has . , .
been experienced with the prior art heat insulating roofing panels. The high temperature differential across . the prior art panels (i.e., panels in which ~o reflecting material is provided on the outer surface of the panel) is thus believed to have caused the curling or-warpage of the panels. For example, curling of up to one inch.in a two inch thick roofing panel has been experienced.
.. However, in accordance with the present invention in which the roofing panels 10 are provided with a thin layer 20 of reflecting material on the outer upper surface thereof, the effects of curling are greatly reduced.
It is believed that this is the result of the fact that the thin layer 20 of xeflecting material serves to reflect and dir~ct the sun radiation away from the upper surface of the heating panel 10 before the application of the roo.fing material 36, 38 and thereby results in a decrease in;the temperature differential across the thickness of the panels 10. Thus, in accordance with the preferred em~odiment of the present invention in which a 11D~6331 --.10--20 of aluminum foil is adhesively secured to the outer upper surface of the roofing panel 10, the thickness being below .001 inches, for example on the order of . .00035 inches, the amount of curling experienced in a two inch thick roofing panel 10 has been reduced to below 3/8 inch and in most instances to ~ inch or less.
. It should be appreciated that although the Present invention has been mainly described with reference to heat insulatiag panels for built-up roofs, the principles employed could also be used for. heat insulating panels for building constructions in general. For example, insu~ated foam sheating panels nailed or secured..to the outside side walls of buildings, which have also experienced some problems of curling in the past, could be provided with a thin layer of reflecting material on the outer surface to minimize curling or warpage of the panels prior to the application of shingles or siding thereover.
- - Preferably, the layer 20 of reflecting material is adhered to the liner 16 of corrugated paper board 12 or other material utilized as the protective skin of the .
roofing panel 10 by means of a high wet strength adhesive.
In this regard, by wet strength adhesive it should be understood that any adhesive which maintains the bond between the liner 16 and the layer 20 of reflecting material over a long period bf.time of water immersion, can be employed. For example, such suitable wet strength adhesive may comprise thermosetting polyvinyl acetate based adhesive as well as neoprene adhesives. The same .....
types of adnesive may also be utilized in adhesively securing the liner 16 to.the corrugated medium 14.
Further~ the thin layer 20 of reflecting material, in accordance with the present invention, is preferably adhesively secured to the corrugated paper board 12 or other medium prior to the use of the paper board medium 12 ., . 'I ; .. .
~ in the manufacturing of the heating panels 10. In other .v words t the thin layer 20 of reflecting material' is preferably initially laminated to the corrugated paper board 12 in the preferred embodiment to form a protective skin 12 prior to the manufacture of the heating panel 10 and the use of the protective s~in 12 in such manu-facturing process. Xn this regard, desirably th'e manu-facture of the panels 10 will be in accordance with a continuous method similar to that described for example in U.S. Patent No. 3,821,337 to Bunclark, issued January 28, 1974. For example, twenty-four inch ~ide panels can be manufactured which are then cut into four foot lengths. In this regard, U.S.'Patent No. 3,821,337 not only describes a continuous process' for'the manu-facture of heat insulating panels but also describes resins which may be employed therein.
However, it should also be appreciated that the present invention could be employed with other types of foam materials which are dimensionally thermo - or hydro -'sensitive, such as for example some poly-styrene or urethane foams, in order to minimize curling or warping of the heat insulating panels.
~he density of the resulting core 24 of open celled phenolic foam material is generally in the range of about 1.5 to 6.~ lb./ft3 and preferably about 2 to 3.5 lb./ft3.
The preparation o the resin and its foaming are well known in the chemical art as well as tne roofing art and needs no furth~e;~ elaboration herein. Examples of such materiaIs can be'found in U.S. Patent Nos. 3,741,920, 3,726,708, i,694,387, 3,779;956, 3,877,967, and 3,953,645.
Although~va~ious types of media may be used for'the protective skins 12, 13 tor for providing a corrugated protective skin), it is preferred that single faced 35. corrugated paper board be used, since such material . . . . .
~ 12- ~ 4~ 33~ 1 - ~ is generally less costly in comparison to other suitable materials. Such suitable single faced corrugated paper board may for example include a liner and medium of' kraft, semi-chemical or other similar paper material.
Typical weights for such paper board amy range from about 26 lb./1000 ft to about 42 lb./1000 ft2; however, it should be understood that other weights ~or the paper board could be utilized. ': -' Also, although in accGrdance with the preferrea embodiment of the present invention both pre-perforations 22 and post-perforations 26 are provided in the protectiye skins 12, 13,it will be appreciated that use of SUCh perfora-tions 22, 26 is not necessary, as a wide variety of types and configurations of protective skins 12, 13 could be used in combina'tion with a thin layer 20 of highly reflective material adhesively secured to the o~ter surface thereof.
While in accordance with the preferred embodiment, the layer of reflecting material preferably comprises a thin layer 20 of aluminum foil, it should also be ' appreciated that other types of highly reflective materials could also be utilized which would serve to re~lect and direct sun radiation away from the upper surface of the panel when same is'supported on a building' structure. Such highly reflective material should - preferably have an emissivity o~ less than 0.30, and more preferably less than 0.10. Aluminum foil has an emissi~ity of a~proximately 0.05. Another suitable material may for example comprise a very thin layer of gold. Furthermore, although in the preferred embodiment' the layer'o~ aluminum has a thickness of less than 0.001 inches.and preferably on the order of .00035 inches, other thicknesses may of course be used. The main consideration in this regard may be the cost o~ such ,......
, : I -13- ~ 4~ 33~
materials. Thus, it will be appreciated that the thinner the layer 20, the less expensive the cost.for the res~lting panel 10. The major requirement on the . thickness of the highly reflective material is whether 5 . the material may be adhesively secured to the protective skin medium.
While the preferred embodiment of the present . invention has been shown and described, it will be Lnderstood that such is merely illustrative and that changes may be made without departing from the scope of the invention as claimed.
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: . . . -.
.
INSULATING ~OAM BUILDING PANEL AND METHOD
OF CONSTRUCTION UTILIZING SUCH PANELS
BACKGROUND OF THE ~NV~NTION
The present invention relates to heat insulating panels which are comprised of a core of foam material for use in construction of heat insulated building stx-~ctures, such as built-up roofs, and more particularly to an improved heat insulating panel which manifests reduced curling under the heat of the sun.
The use of foamed plastic material for insulating purp~ses in building structures such as exterior or paxtition walls, bulk heads, ceilings, floors, storage tanks, and roof structures is well known as such foamed plastic materials have a very low thermal conductivity.
Such foam plastic materials having low thermal conductivity for instance may comprise phenolic foam material such as for example thermoset phenol formaldehyde materials.
ther low thermal conductivity foam materials comprise poly-styrene foam and/or urethane foam.
The foam materials used as roofing insulation have a density of about 1.5 to about 6 lb/~t3 so as to have sufficient strength to support persons and their equipment.
Typically, in such construction applications, the foam material is sandwiched b~tween a pair o~ protective skins, such as for example paper or paper composites.
The protec~iye s~ins serve as a convenient means of making the heat insulating panels,as well as ~o protect and maintain the integrity of the sandwiched foam material.
~b ~J
' - . 1'' ' , .
~1~ti33~ l , .. -2-, One problem experienced with respect to such heat insulating panels of the prior art, such as roofing panels, is curling or warping of the panel. More particu-; larly, during the construction of built up roofs'employing such heat insulating roofing panels, the insulation panels are initially applied with a suitable adhesive.to the supporting structure, such as for example a corrugated steel roof deck, and'then bituminized roofing materials are applied over roof insulator panels to complete the roof structure. ~owever, from the time the panels are applied on the roof support structure until the application of.roofing materials thereover, the panels curl under the heat of the sun. For example, with two inch thick roofing panels constructed of open celled phenolic foam material sandwiched between a pair of paper media, c~rling of up to one inch can result under the heat of the sun on a very hot-day. ' It is desirable to minimize the amount of curling before the application of roofing materials thereon, in order to assure a reasonably flat support on which the com,ponents of the roofing membrane can be applied.
SUMMARY OF THE INVENTION
, In accordance with the present invention, there is . , provided an improved heat insulating panel, such as for example a roofing panel or an insulating sheathing panel, , which manifests reduced curling,or warpage of the panel after being applied on a supporting structure and before application of inishing materials thereover, and. .
as such'overco~es some of .the above discussed and other disadvantages.of the.prior art. More. particularly; in -accordance with the present invention, the improved heatinsulating panel comprises first and second oppositely disposed surfaces having a core therebetween comprised of heat insulating foam material. One of the oppositely ~ ~.4~331 '~
.,, , --~s-- , . .
disposed surfaces includes a thin l~yer of reflecting material over substantially the entire surface ther.eof to . reduce the heat conveyed to the core due to sun radiation .when the insulating panel is exposed to sun radiation during the construction or the renovation of a building structure.
In this regard, with many suitable foam materials, such as phenolic foam materials, which meet the mechanical.
and heat insulating performance requirements for building structures, the oam materials have a tendency to retain moisture which, given enough time, reaches equilibrium with.the atmospheric vapor partial pressure. ~or example, such foam materials may have : ....... the characteristic of absorbing and retaining up to 10~ moisture by weight when in an environment at 50% relative .humidity at room temperature.
Consequently, when the heat insulating panels are exposed to sun radiation after being applied to a supporting structure and before application of.the finishing materials thereover, the sun radiation may heat up the exposed surface of the panel. The resulting heat gradient established in the panel in turn may have the tendency to dri~e the moisture in the panels from the hot side of the panel to the relatively cool side of the panel, thereby causing shrin~age of the top exposed . -side of the panel and swelling and/or expansion of the lower side of the panel. .This can thus result in the aforemen-tioned curling--problem experienced in the prior art.
~owever, with the present invention, during the construction of the building structure, the heat insu-lating panels are adhered to the supporting structure. In this manner, the sun radiation is reflected away from the core of foam material, so that the temperature differential across the panel is reduced. Consequently, warpage or curling of the panels .
~'14633~
is substantially reduced so that the finishing materials such as roofing materials when the panels . are supported on a roof support structure, may be .easily applied over the surface of the heat insulating panels.
More particularly, and in accordance with the preferred embodiment, the thin layer of reflecting material comprises a thin layer of aluminum foil on the one surface of the panel. Still more particularly, the core of foam material is sandwiched between a pair of protective skins, each of which may comprise a corrugated medium of kraft, semi-chemical or similar paper having a liner attached to one side thereof remote from the core.
The aluminum foil is adhesively secured to the liner of one of the protective skins so as to substantially overlie one.of the outer surfaces of the panel. ~or example, the thin layer of aluminum foil may be secured with a neoprene adhesive or other high wet strength adhesive.
In accordance with another aspect of the present invention, there is disclosed a method of constructing a heat insulating structure which comprises of the steps of providing a plurality.of heat insulating.panels, each of which includes a thin layer of reflecting material over substantially the enti~e surface of one side of the panel, applying the plurality of heat insulating panels on a building support structure so that the layer of reflecting material on the.first surfaces is exposed to the sun radiation which may be present, whereby the thin layer of reflecting material serve-s to reduce heat conveyed to the core of the panel when sun radiation is present, and then applying at least one layer of finishing material ~1~6331 ~5--over the supported panels to thereby substantially cover the reflecting material. In this way, the problem of wa~ping ox curling of the panels prior to the application of the finishing material thereover is minimized.
These and other features and characteristics of the present invention will be apparent from the following detailed'description in which reference is made to the enclosed drawings which illustrate a preferred embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an enlarged cross-sectional elevation in perspective of a protective skin employed in the heat - insulating,panel in accordance with the present invention, with the protective skin having a thin layer of reflec!ting material applied to the outer surface thereof.
Figure 2 is an enlarged cross-sectional elevation in perspective of a heating insulating panel employing the ' ' protective skin shown in Figure 1 to define one surface thereof in accordance with the present invention.
Figure'3 is a cross-sectional elevation illustrating - ' the, heat insulating panel in accordance with the present ' invention supported on a roof supporting structure and having roofing material applied thereover to form a composite built-up roofing structure.
DETAILED-DESCRIPTION OF THE PREFERRED EMBODIMENT
.
Referring now to the drawings wherein like reference characters rep~esent like elements, there is shown in Figure 1 a protective skin 12 used in forming a composite heat insulating panel 10 in 'accordance with the present invention., T,he, protective skin 12 preferably comprises a single faced,corrugated paper board structure having a corrugated paper board medium 14 and an outer liner 16 adhered to the crest portio~s of the corrugated medium wlth a suitable adhesi~e, such as for example a wet 3~ r strength adhesive. A thin layer of reflecting material 20, which may for example comprise a thin sheet of aluminum foil, is in turn adhesively secured to the outer surface of the liner 16, i.e., the surface opposite to the surface adhered to the crest portions of the corrugated medium 14., The composite protective skin 12 may be provided with a plurality of pre-perf~rations 22 which pass through the' corrugated medium 14, the paper board liner 16 and the thin layer of reflecting material 20, for a purpose to be explained more fully hereinbelow.
There is shown in Figure 2 a heat insulating panel 10 in accordance with the present invention which is particularly userul as a roofing panel for construction of a built-up roof. The panel '10 comprises upper and lower protective skins 12, 13 having a core 24 of foam material therebetween such as for example phenolic foam material , which is dimensionally moisture sensitive. The upper protective skin 12 comprises a skin s'uch as shown in Figure 1 having a thin layer of reflecting material 20 thereon, whereas the lower protective,skin 13 is of a similar construction to the upper skin 12 with the exception that no layer of reflecting material need be 25- provided. Thus, it will, be noted in Figure 2 that the thin layer of reflecting material 20 need only be , provided on one of the outer surfaces of the formed heat insulating roofing panel 10, i.e., on the surface of the corrugated paper board facing away from the corrugated medium 14 and also away from the core'24 of the phenolic'oam material therebetween.
The upper and lower protective skins 12, 13 both preferably 'c,omprise single faced corrugated skins which provide for a good adhesion between skins 12, 13 and the phenolic foam material 24 therebetween as a result of the reduction of the amount of volatile materials accumulated between the skins 12, 13 during the manu-facturing process and of the foamable resin compound : , :
., . . _7_ passing through the,plurality of pre-perforatio,ns 22 ~rovided therein. ~he heat insulating bo~rd or panel 10 panel 10 may also be provided with a ~-plurality of post-perforations 26 which provide for an increased bond between the core 24 oP the foam, the protective skins 12, 13 and the roof supporting structure' 30 on one side of the heat insulating roofing panel 10 and the finishing roofing membrane 32 on the other side thereof by means of the roofing adhesive 34 and the roofing bitumen 26 which penetrates through the post-perforation holes during the process of forming the resulting roofing structure 40 (see Figure 3). In,.this , regard, the roofing material ~either the roofing adhesive 34 for securing the panels 10 to the roof supporting structure 30 or the bitumen 36 applied over the upper surface of the roofing panels 10 during the construction of the roof 40) will seep through the post-perforations 26 and form plugs 28 which provide a firm water resistant bond between the roofing materia.ls and ~he heat insulating roofing panel'or board 10.
~ ore particularly, during the construction of a built-~up roof;:40, a plurality of the heat insulating roofing panels 10 such as shown in Figure 2 are placed on a suitabLe roof,supporting structure 30,.which may for example compri'se a corruqated sheet steel support, the crests or pe'aks of which serve to sup'port the ro~fing panels 10. This is shown in cross-section in Figure 3.
33~ ~
~8--In this placement of the roofing panels 10 on the , corrugated support s'tructure 30, the panels 10 are , arranged in side by side relationship to cover the entire upper surface of the corrugated support structure 30.
Each of the panels 10 is arranged so that the thin layer of reflecting material 20 provided on the outer surface of one of the sides of the panels 10 faces away from the roof supporting structure 30, i.e., to face upwardly as shown in ~igure 3. Thus, it will be appreciated that .
the thin layer 20 of reflecting material will be exposed to any sun radiation which is present during this phase of the construction of the roof. ' -, lS Each of the roofing panels 10 may be suitably secured to the corrugated roof supporting structure 30 with any suitable adhesive 34, such as for example by roofing adhesive which may penetrate the bottom protective skin 13 through the post-perforations 26. This will form the ' 20 aforementioned plugs 28 in the lower side of the panel 10.
After the panels 10 have been laid up on the roof supporting structure 30 with the layers 20 of reflecting material facing the sun, one or more layers of roofing' materiai are then applied over the upper surfaces of the heat insulating panels 10. These roofing materials may comprise bitumino,us roofing materials such as alternating layers of asphalt 36, and asphalt saturated roofing felts 38, with the system then being gravelled over to complete the finished roof structure 40. In the embodiment shown 30 'in Figure 3, four layers each of asphalt 36 and ,38 are shown.- Ho,~ever, if desired, fewer or more layers could be provided.
As'noted in the Background of the Invention section, prior art he'at insulating roofing panels constructed of ,foam material have experienced problems in curling or warpage. This is believed in part to be due to the fact 114tj3;3 9 _ that the foam material has a tende~cy to absorb and retain moisture. For example, the foam materials may have a tendency to absorb approximately 10% moisture by weight . 5 when in an environ~ent at 50% relative humidity at room temperature. During the.construction process in the prior art in which the panels are initially placed on the roof support, and exposed and unprotected from the sun radiation, the heat from the sun radiation on the upper surface of the panels can cause a high temperature differential across the opposite surfaces which can have the effect of driving the moisture in the foam material away from the hot side towards the cold..side,.
and/or uneven evaporation of the moisture therewithin.
For example, up to a 55 F differential (140 F at the .. . upper surface and 95 F at the lower surface) has . , .
been experienced with the prior art heat insulating roofing panels. The high temperature differential across . the prior art panels (i.e., panels in which ~o reflecting material is provided on the outer surface of the panel) is thus believed to have caused the curling or-warpage of the panels. For example, curling of up to one inch.in a two inch thick roofing panel has been experienced.
.. However, in accordance with the present invention in which the roofing panels 10 are provided with a thin layer 20 of reflecting material on the outer upper surface thereof, the effects of curling are greatly reduced.
It is believed that this is the result of the fact that the thin layer 20 of xeflecting material serves to reflect and dir~ct the sun radiation away from the upper surface of the heating panel 10 before the application of the roo.fing material 36, 38 and thereby results in a decrease in;the temperature differential across the thickness of the panels 10. Thus, in accordance with the preferred em~odiment of the present invention in which a 11D~6331 --.10--20 of aluminum foil is adhesively secured to the outer upper surface of the roofing panel 10, the thickness being below .001 inches, for example on the order of . .00035 inches, the amount of curling experienced in a two inch thick roofing panel 10 has been reduced to below 3/8 inch and in most instances to ~ inch or less.
. It should be appreciated that although the Present invention has been mainly described with reference to heat insulatiag panels for built-up roofs, the principles employed could also be used for. heat insulating panels for building constructions in general. For example, insu~ated foam sheating panels nailed or secured..to the outside side walls of buildings, which have also experienced some problems of curling in the past, could be provided with a thin layer of reflecting material on the outer surface to minimize curling or warpage of the panels prior to the application of shingles or siding thereover.
- - Preferably, the layer 20 of reflecting material is adhered to the liner 16 of corrugated paper board 12 or other material utilized as the protective skin of the .
roofing panel 10 by means of a high wet strength adhesive.
In this regard, by wet strength adhesive it should be understood that any adhesive which maintains the bond between the liner 16 and the layer 20 of reflecting material over a long period bf.time of water immersion, can be employed. For example, such suitable wet strength adhesive may comprise thermosetting polyvinyl acetate based adhesive as well as neoprene adhesives. The same .....
types of adnesive may also be utilized in adhesively securing the liner 16 to.the corrugated medium 14.
Further~ the thin layer 20 of reflecting material, in accordance with the present invention, is preferably adhesively secured to the corrugated paper board 12 or other medium prior to the use of the paper board medium 12 ., . 'I ; .. .
~ in the manufacturing of the heating panels 10. In other .v words t the thin layer 20 of reflecting material' is preferably initially laminated to the corrugated paper board 12 in the preferred embodiment to form a protective skin 12 prior to the manufacture of the heating panel 10 and the use of the protective s~in 12 in such manu-facturing process. Xn this regard, desirably th'e manu-facture of the panels 10 will be in accordance with a continuous method similar to that described for example in U.S. Patent No. 3,821,337 to Bunclark, issued January 28, 1974. For example, twenty-four inch ~ide panels can be manufactured which are then cut into four foot lengths. In this regard, U.S.'Patent No. 3,821,337 not only describes a continuous process' for'the manu-facture of heat insulating panels but also describes resins which may be employed therein.
However, it should also be appreciated that the present invention could be employed with other types of foam materials which are dimensionally thermo - or hydro -'sensitive, such as for example some poly-styrene or urethane foams, in order to minimize curling or warping of the heat insulating panels.
~he density of the resulting core 24 of open celled phenolic foam material is generally in the range of about 1.5 to 6.~ lb./ft3 and preferably about 2 to 3.5 lb./ft3.
The preparation o the resin and its foaming are well known in the chemical art as well as tne roofing art and needs no furth~e;~ elaboration herein. Examples of such materiaIs can be'found in U.S. Patent Nos. 3,741,920, 3,726,708, i,694,387, 3,779;956, 3,877,967, and 3,953,645.
Although~va~ious types of media may be used for'the protective skins 12, 13 tor for providing a corrugated protective skin), it is preferred that single faced 35. corrugated paper board be used, since such material . . . . .
~ 12- ~ 4~ 33~ 1 - ~ is generally less costly in comparison to other suitable materials. Such suitable single faced corrugated paper board may for example include a liner and medium of' kraft, semi-chemical or other similar paper material.
Typical weights for such paper board amy range from about 26 lb./1000 ft to about 42 lb./1000 ft2; however, it should be understood that other weights ~or the paper board could be utilized. ': -' Also, although in accGrdance with the preferrea embodiment of the present invention both pre-perforations 22 and post-perforations 26 are provided in the protectiye skins 12, 13,it will be appreciated that use of SUCh perfora-tions 22, 26 is not necessary, as a wide variety of types and configurations of protective skins 12, 13 could be used in combina'tion with a thin layer 20 of highly reflective material adhesively secured to the o~ter surface thereof.
While in accordance with the preferred embodiment, the layer of reflecting material preferably comprises a thin layer 20 of aluminum foil, it should also be ' appreciated that other types of highly reflective materials could also be utilized which would serve to re~lect and direct sun radiation away from the upper surface of the panel when same is'supported on a building' structure. Such highly reflective material should - preferably have an emissivity o~ less than 0.30, and more preferably less than 0.10. Aluminum foil has an emissi~ity of a~proximately 0.05. Another suitable material may for example comprise a very thin layer of gold. Furthermore, although in the preferred embodiment' the layer'o~ aluminum has a thickness of less than 0.001 inches.and preferably on the order of .00035 inches, other thicknesses may of course be used. The main consideration in this regard may be the cost o~ such ,......
, : I -13- ~ 4~ 33~
materials. Thus, it will be appreciated that the thinner the layer 20, the less expensive the cost.for the res~lting panel 10. The major requirement on the . thickness of the highly reflective material is whether 5 . the material may be adhesively secured to the protective skin medium.
While the preferred embodiment of the present . invention has been shown and described, it will be Lnderstood that such is merely illustrative and that changes may be made without departing from the scope of the invention as claimed.
.
,, . .
. . . .
: . . . -.
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Claims (17)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of constructing a heat insulating building structure comprising the steps of:
providing a plurality of heat insulating panels, each of said heat insulating panels comprising first and second oppos-itely disposed surfaces, a core of open celled phenolic foam mater-ial between said first and second surfaces, and said first surface including a thin layer of reflecting material over substantially the entire surface thereof;
attaching said plurality of heat insulating panels to a building support structure so that said layer of reflecting material on said first surface is exposed to sun radiation which may be present, whereby said thin layer of reflecting material serves to reduce heat conveyed to said core when sun radiation is present to thereby minimize the temperature differential across said core; and applying at least one layer of finishing material directly to said first surface of said heat insulating panels to thereby substantially cover said layer of reflecting material so that no air space is created between said first surface and said finishing material.
providing a plurality of heat insulating panels, each of said heat insulating panels comprising first and second oppos-itely disposed surfaces, a core of open celled phenolic foam mater-ial between said first and second surfaces, and said first surface including a thin layer of reflecting material over substantially the entire surface thereof;
attaching said plurality of heat insulating panels to a building support structure so that said layer of reflecting material on said first surface is exposed to sun radiation which may be present, whereby said thin layer of reflecting material serves to reduce heat conveyed to said core when sun radiation is present to thereby minimize the temperature differential across said core; and applying at least one layer of finishing material directly to said first surface of said heat insulating panels to thereby substantially cover said layer of reflecting material so that no air space is created between said first surface and said finishing material.
2. The method of constructing a heat insulating building structure of claim 1 wherein said reflecting material comprises a material having an emissivity of less than 0.30.
3. The method of constructing a heat insulating building structure of claim 2 wherein said reflecting material has an emissivity of less than 0.10,
4. The method of constructing a heat insulating building structure of claim 3 wherein said thin layer of reflecting mater-ial comprises a thin layer of aluminum foil.
5. The method of constructing a heat insulating building structure of claim 4 wherein said thin layer of aluminum foil has a thickness of less than 0.001 inches.
6. The method of constructing a heat insulating building structure of claim 1 further including a pair of protective skins for said core of foam material, each of said protective skins having an inner surface adhered to opposite sides of said core, and an outer surface, said outer surface of one of said protective skins defining said second surface of said heat insulating panel and said thin layer of reflecting material being adhesively secured to said outer surface of the other of said pair of protective skins.
7. The method of constructing a heat insulating building structure of claim 5 wherein said pair of protective skins each comprise single faced corrugated paper board, the corrugations of each of said single faced corrugated paper boards defining said inner surface adhered to said core.
8. The method of constructing a heat insulating building structure of claim 6 wherein said pair of protective skins each comprise a corrugated medium having one side adhered to said core, and a liner adhered to the crests of the opposite side of said cor-rugated medium.
9. The method of constructing a heat insulating building structure of claim 6 wherein said thin layer of reflecting material is adhesively secured to said protective skins with a high wet strength adhesive.
10. The method of constructing a heat insulating build-ing structure of claim 9 wherein said high wet strength adhesive comprises a neoprene adhesive.
11. The method of constructing a heat insulating building structure of claim 1 wherein said core of foam material comprises phenolic foam material.
12. The method of constructing a heat insulating building structure of claim 11 wherein said core of phenolic foam material includes open celled phenolic foam material.
13. The method of constructing a heat insulating building structure of claim 1 in which said building structure comprises a built-up roof, wherein said heat insulating panels comprise heat insulating roofing panels, and wherein said step of attaching comprises laying said heat insulating roofing panels on a roof support structure so that said second surfaces of said panels are adjacent to said roof support structure and said layer of reflect-ing material on said first surface is exposed to sun radiation which may be present.
14. The method of constructing a heat insulating roofing structure of claim 13 wherein said step of applying at least one layer of finishing material comprising applying at least one layer of roofing material over said layers of reflective material.
15. The method of constructing a heat insulating roofing structure of claim 14 wherein said step comprises applying at least one layer of asphalt over said thin layers.
16. The method of constructing a heat insulating roofing structure of claim 13 wherein said step of applying comprises applying several layers of roofing material over said layer of reflective material on each of said roofing panels.
17. A method of constructing a heat insulating building structure comprising the steps of:
providing a plurality of heat insulating panels, each of said heat insulating panels comprising first and second oppos-itely disposed surfaces, a core of foam material of the type capable of absorbing and retaining moisture, said core of foam material being between said first and second surfaces, and said first surface including a thin layer of reflecting material over substantially the entire surface thereof;
attaching said plurality of heat insulating panels to a building support structure so that said layer of reflecting material on said first surface is exposed to sun radiation which may be present, whereby said thin layer of reflecting material serves to reduce heat conveyed to said core when sun radiation is present to thereby minimize the temperature differential across said core; and applying at least one layer of finishing material directly to said first surface of said heat insulating panels to thereby substantially cover said layer of reflecting material so that no air space is created between said first surface and said finishing material.
providing a plurality of heat insulating panels, each of said heat insulating panels comprising first and second oppos-itely disposed surfaces, a core of foam material of the type capable of absorbing and retaining moisture, said core of foam material being between said first and second surfaces, and said first surface including a thin layer of reflecting material over substantially the entire surface thereof;
attaching said plurality of heat insulating panels to a building support structure so that said layer of reflecting material on said first surface is exposed to sun radiation which may be present, whereby said thin layer of reflecting material serves to reduce heat conveyed to said core when sun radiation is present to thereby minimize the temperature differential across said core; and applying at least one layer of finishing material directly to said first surface of said heat insulating panels to thereby substantially cover said layer of reflecting material so that no air space is created between said first surface and said finishing material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14363080A | 1980-04-25 | 1980-04-25 | |
| US143,630 | 1980-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1146331A true CA1146331A (en) | 1983-05-17 |
Family
ID=22504900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000372793A Expired CA1146331A (en) | 1980-04-25 | 1981-03-11 | Insulating foam building panel and method of construction utilizing such panels |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0039158A3 (en) |
| CA (1) | CA1146331A (en) |
| DK (1) | DK152392C (en) |
| NO (1) | NO811393L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4900616A (en) * | 1989-05-31 | 1990-02-13 | Fiberglas Canada, Inc. | Phenolic foam roof insulation of improved dimensional stability |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2166688A (en) * | 1984-11-13 | 1986-05-14 | Robert Douglas Hawkins | Resin-bonded laminates |
| GB8714318D0 (en) * | 1987-06-18 | 1987-07-22 | Coolag Purlboard Ltd | Flat roofing |
| AU674507B2 (en) * | 1992-03-19 | 1997-01-02 | Tri-Foam Australia Pty. Ltd. | Insulation for structures |
| AU648973B3 (en) * | 1992-03-19 | 1994-05-05 | Tri-Foam Australia Pty. Ltd. | Insulation for structures |
| GB9222634D0 (en) * | 1992-10-28 | 1992-12-09 | Hansen Flemming | Support structures |
| DE202011107456U1 (en) * | 2011-11-04 | 2012-01-11 | Bsw Berleburger Schaumstoffwerk Gmbh | Building protection for mounting on a roof seal |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH451488A (en) * | 1966-08-22 | 1968-05-15 | Prignitz Hapri Leichtbau | Method and device for the production of building panels |
| US3814659A (en) * | 1971-02-01 | 1974-06-04 | Upjohn Co | Novel compositions |
| US3874983A (en) * | 1973-12-17 | 1975-04-01 | Dow Chemical Co | Laminate construction |
| DK142377B (en) * | 1975-04-14 | 1980-10-20 | Karl Aage Pederson | Method and form for making a building element with a foamed plastic core and a metal plate consisting of a surface coating. |
| US4033802A (en) * | 1976-02-11 | 1977-07-05 | Culpepper & Associates, Inc. | Siding panel backerboard and method of manufacturing same |
| US4227356A (en) * | 1978-03-23 | 1980-10-14 | Exxon Research & Engineering Co. | Composite foam roof insulation |
-
1981
- 1981-03-11 CA CA000372793A patent/CA1146331A/en not_active Expired
- 1981-04-09 EP EP81301563A patent/EP0039158A3/en not_active Withdrawn
- 1981-04-22 DK DK180181A patent/DK152392C/en active
- 1981-04-24 NO NO811393A patent/NO811393L/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4900616A (en) * | 1989-05-31 | 1990-02-13 | Fiberglas Canada, Inc. | Phenolic foam roof insulation of improved dimensional stability |
Also Published As
| Publication number | Publication date |
|---|---|
| DK152392C (en) | 1988-07-18 |
| NO811393L (en) | 1981-10-26 |
| DK180181A (en) | 1981-10-26 |
| DK152392B (en) | 1988-02-22 |
| EP0039158A3 (en) | 1982-02-03 |
| EP0039158A2 (en) | 1981-11-04 |
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| MKEX | Expiry |