US20030126806A1 - Thermal deck - Google Patents
Thermal deck Download PDFInfo
- Publication number
- US20030126806A1 US20030126806A1 US10/041,804 US4180402A US2003126806A1 US 20030126806 A1 US20030126806 A1 US 20030126806A1 US 4180402 A US4180402 A US 4180402A US 2003126806 A1 US2003126806 A1 US 2003126806A1
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- US
- United States
- Prior art keywords
- air space
- foil
- roof
- air
- panel
- 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.)
- Abandoned
Links
- 239000011888 foil Substances 0.000 claims abstract description 55
- 230000004888 barrier function Effects 0.000 claims abstract description 32
- 125000006850 spacer group Chemical group 0.000 claims abstract description 32
- 239000011120 plywood Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims 6
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 13
- 239000002023 wood Substances 0.000 description 13
- 238000009413 insulation Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000012774 insulation material Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 210000004394 hip joint Anatomy 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
Images
Classifications
-
- 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
- E04D13/17—Ventilation of roof coverings not otherwise provided for
-
- 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
- E04B7/20—Roofs consisting of self-supporting slabs, e.g. able to be loaded
Definitions
- the present invention relates generally to insulating a house and particularly to insulating a house using decking and still more particularly to insulating the roof of a house using insulated decking.
- the roof system of a conventional residential building includes uniformly spaced joists spanning the length between pairs of parallel support beams, the joists forming the ceiling.
- Wallboard and 2 ⁇ 6 boards may be placed on top of the uniformly spaced joists.
- Metal or wood trusses are then erected above the joists to form the framing for the roof.
- Exterior plywood sheathing is applied on top of the trusses and an exterior covering, such as a roofing felt and either asphalt, metal roofing or wood shingles, is then secured to the exterior surface of the sheathing.
- soffits, or ventilated panels are installed to allow air to circulate freely, helping prevent problems with excessive heat or moisture inside the eaves and attic.
- ceiling and roof systems can have less than desirable insulation properties and thus additional insulation is often used.
- the roof structure of most conventional industrial buildings typically include rafters, purlins mounted on the rafters, and sheets of hard metal roofing material mounted over the purlins. Blankets of insulation material are typically rolled out over the purlins and sandwiched between the purlins and the sheets of hard metal roofing material. Examples of such insulated roof structures are disclosed in U.S. Pat. Nos. 3,559,914, 4,047,345 and 4,147,003.
- U.S. Pat. No. 2,015,817 to Schmidt and U.S. Pat. No. 2,116,270 to Le Grand disclose heat reflective metal surfaces in conjunction with air spaces adjacent the same for minimizing the transfer of heat through the wall surface by radiation.
- the problem with such a design is that heat is conducted through the first wood layer to the foil barrier. Foil is a good conductor but a poor radiator. As the foil barrier is heated, very little of the heat is given off in the form of radiation into the air space. Most of the heat is given off in the form of conduction by convection currents inside the air space and is allowed to heat the air inside the dead air space. Once the air space is heated, it is difficult to cool down and heat is conducted through the second wood layer and into the building.
- a foil barrier is also on the second wood layer, then some of the heat in the air space may be reflected back into the air space in the form of radiation while the rest heats the second foil through conduction with the convection currents. This conducted heat is further given off in the form of conduction through the plywood and is allowed to heat the inside of the building.
- the insulating assembly of this invention has a pair of spaced apart panels separated by spacers to create an air space.
- a pair of layers of heat radiant foil are spaced apart from each other and located in the air space.
- the assembly has an inlet and outlet to cause air flow through through the air space.
- the first panel has an outside surface and a foil covered inside surface and the second panel has an outside surface and a foil covered inside surface.
- the foil covered inside surfaces face each other and define boundaries of the air space.
- a radiant barrier is positioned between the two panels. Foil is mounted to opposite sides of the barrier. The barrier divides the air space into primary and secondary air spaces.
- FIG. 1 is a cross sectional view of one embodiment of the thermal decking of the present invention, taken along the line 1 - 1 of FIG. 1.
- FIG. 2 is a cross sectional view of another embodiment of the thermal decking of the present invention, taken along the line 2 - 2 of FIG. 2.
- FIG. 3 is a partial cross sectional view of the thermal decking of FIG. 1 installed on a residential roof using a turbine.
- FIG. 4 is a partial cross sectional view of the thermal decking of FIG. 2 installed on a residential roof and wall system using a ridge vent.
- FIG. 5 is a perspective partially sectioned view of the thermal decking of FIG. 1 installed on a roof.
- FIG. 6 is a schematic perspective view of a building roof having the thermal decking of either FIG. 1 or FIG. 2.
- thermal decking 100 comprises a first panel 102 having an outside surface 104 and an inside surface 106 covered with a sheet or layer of foil 105 .
- Foil 105 can be any material that will sufficiently radiate heat but is preferably made of metal and more preferably made of aluminum. Foil 105 will generally be a poor radiator of heat but a good conductor of heat. For example, the emissivity value of aluminum foil is roughly 3% meaning that only 3% of the heat absorbed is given off in the form of radiant heat. On the other hand, 97% is given off by conduction through other materials in contact with the foil or by convection currents.
- Foil 105 is attached to the inside surface 106 of the first panel 102 . By covering the wood with foil 105 , the radiation of heat from the wood is greatly reduced and only a small percentage of heat conducted through the wood and onto foil 105 is allowed to radiate into an air space.
- All of the decking or panels disclosed herein can be made of any material but is preferably made of wood and most preferable plywood.
- Wood, especially plywood is used because the building industry is familiar with using wood and plywood is a relatively rigid insulating material that is commonly used as decking on a roof. Also, it is relatively inexpensive, and because most conventional decking is made of plywood, the present invention could easily be installed on existing as well as new residential and commercial buildings.
- the first panel 102 can vary in thickness but is preferably about 1 ⁇ 2′′ thick 4′ wide and 8′ long.
- a second panel 108 has an outside surface 110 and an inside surface 112 also covered with foil 105 . Inside surface 112 faces the foil covered inside surface 106 of the first panel 102 .
- the second panel 108 can also vary in thickness but is preferably about 1 ⁇ 4′′ thick 4′ wide and 8′ long or alternatively is about 1 ⁇ 2′′ thick 4′ wide and 8′ long.
- At least one spacer 114 is positioned between the first panel 102 and the second panel 108 .
- Spacer 114 can be any size and made of any relatively rigid insulating material but is preferably made of wood.
- Spacer 114 illustrated in FIG. 1 is preferably about 1′′ thick, 2′′ wide, and can be any length so long as the spacer 114 creates a continuous chamber or air space 116 .
- the air space 116 can be any thickness that would allow air to flow from an inlet 210 (FIG. 3) of the thermal decking 100 to an outlet 212 of the thermal decking 100 .
- the spacers 114 can be evenly spaced across the first panel 102 and second panel 108 .
- the spacers 114 may be spaced apart about 16 inches to line up with the ceiling joists, or spacers 114 may be spaced apart about 24 inches to line up with the rafters of the roof. Almost any desired number of multiple spacers 114 can be used and the spacing between each does not have to be equal or in any particular type of pattern.
- Air space 116 may be in the range of about 0.05 inch to about 1 inch from the foil covered inside surface 106 of the first panel 102 to the foil covered inside surface 112 of the second panel 108 and is preferably approximately 3 ⁇ 4 inch. Air space 116 is a continuous conduit for the flow of air from inlet 210 to outlet 212 of the thermal decking 100 . Air space 116 must be open or vented at opposite ends to allow an air current to flow through air space 116 parallel to the lengths of spacers 114 . The thickness of approximately 3 ⁇ 4′′ has been determined to be optimal to avoid eddies and static air spaces.
- thermal decking 100 has a single air space 116 between each two spacers 114 .
- the heat from the heat source is conducted through the outside surface 104 of the first panel 102 to the foil covered inside surface 106 of the first panel 102 .
- Foil 105 prevents most of the heat from being radiated into the air space 116 .
- some of the heat is given off into the air space 116 in the form of conduction by contact with convection currents.
- a rotary air handling device such as turbine 206 (FIG.
- the foil covered inside surface 112 of the second panel 108 reflects any radiant heat back into the air space 116 and prevents the heat from being radiated to the second panel 108 and then into the building.
- a thermal decking 132 comprises a first panel 134 having an outside surface 136 and an inside surface 128 .
- First panel 134 can be any desired thickness but is preferably about 1 ⁇ 2′′ thick 4′ wide and 8′ long.
- a second panel 138 has an outside surface 140 and an inside surface 130 that faces the inside surface 128 of the first panel 134 . Inside surfaces 128 and 130 optionally may be covered with foil 105 .
- the second panel 138 can also be of any desired thickness but is preferably about 1 ⁇ 4′′ thick 4′ wide and 8′ long or alternatively is about 1 ⁇ 2′′ thick 4′ wide and 8′ long.
- a radiant barrier 122 Positioned between the first panel 134 and the second panel 138 is a radiant barrier 122 .
- the radiant barrier 122 is a panel with a top side 124 and a bottom side 126 such that the top side 124 faces the inside surface 128 of the first panel 134 and the bottom side 126 faces the inside surface 130 of the second panel 138 .
- Top side 124 and bottom side 126 are covered with foil 105 .
- the radiant barrier 122 may have an insulation material 150 sandwiched in between the top side 124 and the bottom side 126 .
- the insulation material 150 may be paper material or some other thin material with insulating properties. The insulation material 150 may also improve the handling and instillation of the radiant barrier 122 .
- At least one upper spacer 142 is positioned between the inside surface 128 of the first panel 134 and the top side 124 of the radiant barrier 122 .
- the upper spacer 142 can be any size and is preferably about 1′′ thick, 2′′ wide, and can be any length so long as a primary chamber or air space 144 is created.
- the thickness of the air space 144 can be any thickness that would allow air to flow from the entrance side 302 (FIG. 4) of the thermal decking 132 to the exhaust side 304 of the thermal decking 132 . If more than one upper spacer 142 is used, then the spacers 142 are spaced evenly across the first panel 134 and the radiant barrier 122 .
- the upper spacers 142 may be spaced apart about 16 inches to line up with the ceiling joists or spacers 142 may be spaced apart about 24 inches to line up with the rafters. Almost any number of multiple upper spacers 142 can be used and the spacing between each of them does not have to be equal or in any type of pattern.
- the primary air space 144 maybe in the range of about 0.05 inch to about 1 inch and is preferably approximately 3 ⁇ 4 inch from the inside surface 128 of the first panel 134 to the top side 124 of the radiant barrier 122 . Approximately 3 ⁇ 4′′ has been determined to be the optimal air space to avoid eddies and static air spaces.
- Decking 132 has open opposite ends for air flow in air spaces 144 parallel to spacers 142 .
- the primary air space 144 is a continuous conduit for the flow of air from an inlet 302 (FIG. 3) of the thermal decking 132 to an outlet 304 of the thermal decking 132 .
- At least one lower spacer 146 is positioned between the inside surface 130 of the second panel 138 and the bottom side 126 of the radiant barrier 122 .
- the lower spacer 146 is directly below the upper spacer 142 however the spacers 142 and 146 may be in an alternating pattern or may be in a completely random pattern.
- the lower spacer 146 can be any size but is preferably about 1′′ thick, 2′′ wide, and can be any length so long as a secondary chamber or air space 148 is created.
- the thickness of the secondary air space 148 can be any thickness that would allow air to flow from inlet 302 of the thermal decking 132 to the outlet 304 of the thermal decking 132 .
- the secondary air space 148 may be in the range of about 0.05 inch to about 1 inch and is preferably approximately 3 ⁇ 4 inch from the inside surface 130 of the second panel 138 to the bottom side 126 of the radiant barrier 122 .
- the opposite ends of secondary air space 148 are also open for air flow in air space 148 .
- the secondary air space 148 is a continuous conduit for the flow of air from inlet 302 (FIG. 4) to outlet 304 and runs parallel with the primary air space 144 .
- the two air spaces 144 and 148 can greatly reduce heat from reaching the second panel 138 and being transferred into the building.
- Heat from the heat source is conducted through the first panel 134 and either radiated off foil 105 of the inside surface 128 of the first panel 134 and into air space 144 or conducted due to convection currents in the primary air space 144 , where the heat is then dissipated due to the movement of air from the entrance side 302 to the exhaust side 304 .
- the convection currents in air space 144 can conduct a small amount of the heat to the top side 124 of radiant barrier 122 .
- Foil 105 on top side 124 may reflect the heat back into air space 144 . Also, some of the heat from the top side 124 of radiant barrier 122 may conducted to the bottom side 126 of radiant barrier 122 , where it may be conducted to convection currents in the secondary air space 148 . Foil 105 on inside surface 130 reflects heat back into air space 148 . The heat within air space 148 is then dissipated due to the movement of air from the entrance side 302 (FIG. 4) to the exhaust side 304 of thermal decking 132 . Decking 132 greatly reduces heat from reaching the second panel 138 and being radiated into the building.
- Thermal decking 100 or 132 may be installed on conventional supporting structure such as roof rafters 208 (FIG. 3) in place of the standard decking commonly used.
- Decking 100 is installed so inlet 210 of the decking 100 is in communication with a soffit area 202 of a standard roof to allow for intake of air from the soffit area 202 , through inlet 210 and into the air space 116 .
- Soffit area 202 is the conventional structure that encloses the edge portions of the roof.
- Soffit area 202 has an opening 203 through incoming air passes to inlet 210 .
- Outlet 212 is an elongated opening preferably located at the peak of the roof.
- Outlet 212 is preferably a passageway extending along the peak of the roof, as illustrated in FIG. 6. Outlet 212 is in communication with the upper end of each air space 116 and vents to atmosphere. Outlet 212 may be open along its length to atmosphere, in which case, the air may is moved solely by convection without any additional system to facilitate the movement of the air. Alternately, if desired, a rotary air moving device such as a wind driven or solar powered turbine 206 , electrically powered ridge vent 318 (FIG. 4), or similar system for moving air may be installed at the peak of the roof in communication with outlet 212 of thermal decking 100 . The turbine 206 draws air from the outlet 212 of the thermal decking 100 and releases it into the surroundings.
- a rotary air moving device such as a wind driven or solar powered turbine 206 , electrically powered ridge vent 318 (FIG. 4), or similar system for moving air may be installed at the peak of the roof in communication with outlet 212 of thermal decking 100 .
- the turbine 206 draws
- the second panel 108 may be cut at least 0.5 inch shorter than the first panel 102 , leaving a portion of the first panel 102 extending past the second panel 108 to create inlet 210 for drawing air through the air space 116 .
- Inlet 210 thus has a width the same distance the distance between two of the spacers 114 .
- the ceiling structure 211 of the building may be conventional and preferably has conventional insulation located on it.
- FIGS. 5 and 6 illustrate thermal decking 100 installed at a hip joint of a roof.
- a central enclosed passageway 213 extends upward along the ridge of the hip joint to exhaust passageway 212 located on the peak of the roof.
- Passageway 212 leads to an outlet, which may have a turbine 206 .
- thermal decking 132 could also be installed on conventional roof rafters in much the same manner as the thermal decking 100 . If the thermal decking 132 is installed, then the second panel 138 and the radiant barrier 122 on the inlet side 302 may be cut at least 0.5 inch shorter than upper decking 136 , leaving a portion of the first panel 134 extending past the second panel 138 and the radiant barrier 122 to create inlet 301 . As in the first embodiment, inlet 302 is located in a soffit area 301 that has an opening 303 for air to flow in to inlet 302 . A ridge vent 304 may be installed at outlet 304 on the ridge or peak of the roof to enhance air flow.
- thermal decking 100 could also be installed on the wall studs in place of the standard sheathing on side walls.
- the thermal decking 132 would be orientated such that an inlet 316 is near the base or foundation of the house while the outlet 318 is near the soffit area 202 of the house.
- Inlets 316 are in communication with air spaces 144 , 148 of the thermal decking 100 to create a natural draw to an outlet 318 and into soffit 301 .
- the flow of air may continue from into inlet 302 of the thermal decking 132 on the roof to outlet 304 at the peak of the roof.
- a conventional brick veneer 213 such as shown in FIG. 3, may be installed on the exterior of the wall thermal decking 132 or 100 .
- the thermal decking of the present invention is simple in design and economical to manufacture. It has improved insulation and heat transfer characteristics for residential or industrial buildings.
- the thermal decking does not have a dead air space wherein once the air space is heated, the heat is conducted into the building. Also, the present invention is more efficient and economical to use.
- the device of the invention herein described is intended primarily for use as decking on a roof, it should be recognized that the thermal decking can be used on any surface that needs superior insulating properties. While the foregoing description basically describes the preferred embodiment of an inventive device, it will be understood by those skilled in the art that modifications embodied in various forms may be made without departing from the spirit and scope of the invention as defined in the following claims.
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Abstract
A decking assembly is mounted to a building roof or wall to thermally insulate the buildingt. The decking assembly has a first panel with an outside surface and a foil covered inside surface and a second panel having an outside surface and a foil covered inside surface. The foil covered inside surface of the second panel faces the foil covered inside surface of the first panel. At least one spacer is positioned between the panel so as to create an air space defined by the foil covered inside surfaces. The air space has an open inlet and outlet to create a continuous conduit for the flow of air from an entrance side to an exhaust side. The air space can be divided into two separate compartments by a barrier panel that has foil on opposite sides.
Description
- 1. Technical Field
- The present invention relates generally to insulating a house and particularly to insulating a house using decking and still more particularly to insulating the roof of a house using insulated decking.
- 2. Description of the Related Art
- The roof system of a conventional residential building includes uniformly spaced joists spanning the length between pairs of parallel support beams, the joists forming the ceiling. Wallboard and 2×6 boards may be placed on top of the uniformly spaced joists. Metal or wood trusses are then erected above the joists to form the framing for the roof. Exterior plywood sheathing is applied on top of the trusses and an exterior covering, such as a roofing felt and either asphalt, metal roofing or wood shingles, is then secured to the exterior surface of the sheathing. Often, soffits, or ventilated panels are installed to allow air to circulate freely, helping prevent problems with excessive heat or moisture inside the eaves and attic. However, such ceiling and roof systems can have less than desirable insulation properties and thus additional insulation is often used.
- The roof structure of most conventional industrial buildings typically include rafters, purlins mounted on the rafters, and sheets of hard metal roofing material mounted over the purlins. Blankets of insulation material are typically rolled out over the purlins and sandwiched between the purlins and the sheets of hard metal roofing material. Examples of such insulated roof structures are disclosed in U.S. Pat. Nos. 3,559,914, 4,047,345 and 4,147,003.
- It has been proposed to combine sheets of radiant barrier materials, such as metal foils, between the blankets of insulation and the roofing material for retarding heat transfer through roof structures. To provide an effective barrier against heat transfer, an air space or cavity in which the radiant barrier is positioned also is needed to enable the foil to reflect heat and retard its passage through the roof. If the upper blanket of insulation or other material is in direct contact with the foil, the foil will tend to conduct heat through the roof and into the building instead of reflecting or conducting the heat back to the heat source.
- U.S. Pat. No. 2,015,817 to Schmidt and U.S. Pat. No. 2,116,270 to Le Grand disclose heat reflective metal surfaces in conjunction with air spaces adjacent the same for minimizing the transfer of heat through the wall surface by radiation. The problem with such a design is that heat is conducted through the first wood layer to the foil barrier. Foil is a good conductor but a poor radiator. As the foil barrier is heated, very little of the heat is given off in the form of radiation into the air space. Most of the heat is given off in the form of conduction by convection currents inside the air space and is allowed to heat the air inside the dead air space. Once the air space is heated, it is difficult to cool down and heat is conducted through the second wood layer and into the building. If a foil barrier is also on the second wood layer, then some of the heat in the air space may be reflected back into the air space in the form of radiation while the rest heats the second foil through conduction with the convection currents. This conducted heat is further given off in the form of conduction through the plywood and is allowed to heat the inside of the building.
- Accordingly, it would be desirable to provide a radiant barrier material having improved insulation and heat transfer properties for a residential or industrial building.
- It is an object of the present invention to provide a radiant barrier material having improved insulation and heat transfer characteristics for a residential or industrial building.
- It is another object of the present invention to provide a radiant barrier system that eliminates static air space which, once heated, would tend to conduct heat through a second wood layer and into the building.
- It is yet another object of the present invention to provide a radiant barrier material that is more efficient and economical to use.
- The insulating assembly of this invention has a pair of spaced apart panels separated by spacers to create an air space. A pair of layers of heat radiant foil are spaced apart from each other and located in the air space. The assembly has an inlet and outlet to cause air flow through through the air space.
- In the first embodiment the first panel has an outside surface and a foil covered inside surface and the second panel has an outside surface and a foil covered inside surface. The foil covered inside surfaces face each other and define boundaries of the air space. After installation of the thermal decking, a rotary air moving mechanism may be mounted to the building for drawing air from the inlet to the outlet.
- In a second embodiment, a radiant barrier is positioned between the two panels. Foil is mounted to opposite sides of the barrier. The barrier divides the air space into primary and secondary air spaces.
- The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself however, as well as a preferred mode of use, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein:
- FIG. 1 is a cross sectional view of one embodiment of the thermal decking of the present invention, taken along the line1-1 of FIG. 1.
- FIG. 2 is a cross sectional view of another embodiment of the thermal decking of the present invention, taken along the line2-2 of FIG. 2.
- FIG. 3 is a partial cross sectional view of the thermal decking of FIG. 1 installed on a residential roof using a turbine.
- FIG. 4 is a partial cross sectional view of the thermal decking of FIG. 2 installed on a residential roof and wall system using a ridge vent.
- FIG. 5 is a perspective partially sectioned view of the thermal decking of FIG. 1 installed on a roof.
- FIG. 6 is a schematic perspective view of a building roof having the thermal decking of either FIG. 1 or FIG. 2.
- Referring to FIG. 1,
thermal decking 100 comprises afirst panel 102 having anoutside surface 104 and aninside surface 106 covered with a sheet or layer offoil 105.Foil 105 can be any material that will sufficiently radiate heat but is preferably made of metal and more preferably made of aluminum.Foil 105 will generally be a poor radiator of heat but a good conductor of heat. For example, the emissivity value of aluminum foil is roughly 3% meaning that only 3% of the heat absorbed is given off in the form of radiant heat. On the other hand, 97% is given off by conduction through other materials in contact with the foil or by convection currents.Foil 105 is attached to theinside surface 106 of thefirst panel 102. By covering the wood withfoil 105, the radiation of heat from the wood is greatly reduced and only a small percentage of heat conducted through the wood and ontofoil 105 is allowed to radiate into an air space. - All of the decking or panels disclosed herein can be made of any material but is preferably made of wood and most preferable plywood. Wood, especially plywood is used because the building industry is familiar with using wood and plywood is a relatively rigid insulating material that is commonly used as decking on a roof. Also, it is relatively inexpensive, and because most conventional decking is made of plywood, the present invention could easily be installed on existing as well as new residential and commercial buildings. The
first panel 102 can vary in thickness but is preferably about ½″ thick 4′ wide and 8′ long. Asecond panel 108 has anoutside surface 110 and aninside surface 112 also covered withfoil 105. Insidesurface 112 faces the foil covered insidesurface 106 of thefirst panel 102. Thesecond panel 108 can also vary in thickness but is preferably about ¼″ thick 4′ wide and 8′ long or alternatively is about ½″ thick 4′ wide and 8′ long. At least onespacer 114 is positioned between thefirst panel 102 and thesecond panel 108.Spacer 114 can be any size and made of any relatively rigid insulating material but is preferably made of wood.Spacer 114 illustrated in FIG. 1 is preferably about 1″ thick, 2″ wide, and can be any length so long as thespacer 114 creates a continuous chamber orair space 116. Theair space 116 can be any thickness that would allow air to flow from an inlet 210 (FIG. 3) of thethermal decking 100 to anoutlet 212 of thethermal decking 100. - If more than one
spacer 114 is used then thespacers 114 can be evenly spaced across thefirst panel 102 andsecond panel 108. Thespacers 114 may be spaced apart about 16 inches to line up with the ceiling joists, orspacers 114 may be spaced apart about 24 inches to line up with the rafters of the roof. Almost any desired number ofmultiple spacers 114 can be used and the spacing between each does not have to be equal or in any particular type of pattern. -
Air space 116 may be in the range of about 0.05 inch to about 1 inch from the foil covered insidesurface 106 of thefirst panel 102 to the foil covered insidesurface 112 of thesecond panel 108 and is preferably approximately ¾ inch.Air space 116 is a continuous conduit for the flow of air frominlet 210 tooutlet 212 of thethermal decking 100.Air space 116 must be open or vented at opposite ends to allow an air current to flow throughair space 116 parallel to the lengths ofspacers 114. The thickness of approximately ¾″ has been determined to be optimal to avoid eddies and static air spaces. - As seen in FIG. 1,
thermal decking 100 has asingle air space 116 between each twospacers 114. When thethermal decking 100 is installed such that thefirst panel 102 is next to a heat source, the heat from the heat source is conducted through theoutside surface 104 of thefirst panel 102 to the foil covered insidesurface 106 of thefirst panel 102.Foil 105 prevents most of the heat from being radiated into theair space 116. However, some of the heat is given off into theair space 116 in the form of conduction by contact with convection currents. To dissipate the heat in the convection currents to the outside surface a rotary air handling device such as turbine 206 (FIG. 3) may be installed to create the movement of air frominlet 210 to theoutlet 212. This eliminates most heat in the convection currents from being conducted to thesecond panel 108 and then into the building. The foil covered insidesurface 112 of thesecond panel 108 reflects any radiant heat back into theair space 116 and prevents the heat from being radiated to thesecond panel 108 and then into the building. - In a second embodiment shown in FIG. 2, a
thermal decking 132 comprises afirst panel 134 having anoutside surface 136 and aninside surface 128.First panel 134 can be any desired thickness but is preferably about ½″ thick 4′ wide and 8′ long. Asecond panel 138 has anoutside surface 140 and aninside surface 130 that faces theinside surface 128 of thefirst panel 134. Insidesurfaces foil 105. Thesecond panel 138 can also be of any desired thickness but is preferably about ¼″ thick 4′ wide and 8′ long or alternatively is about ½″ thick 4′ wide and 8′ long. Positioned between thefirst panel 134 and thesecond panel 138 is aradiant barrier 122. Theradiant barrier 122 is a panel with atop side 124 and abottom side 126 such that thetop side 124 faces theinside surface 128 of thefirst panel 134 and thebottom side 126 faces theinside surface 130 of thesecond panel 138.Top side 124 andbottom side 126 are covered withfoil 105. Theradiant barrier 122 may have aninsulation material 150 sandwiched in between thetop side 124 and thebottom side 126. Theinsulation material 150 may be paper material or some other thin material with insulating properties. Theinsulation material 150 may also improve the handling and instillation of theradiant barrier 122. - At least one
upper spacer 142 is positioned between theinside surface 128 of thefirst panel 134 and thetop side 124 of theradiant barrier 122. Theupper spacer 142 can be any size and is preferably about 1″ thick, 2″ wide, and can be any length so long as a primary chamber orair space 144 is created. The thickness of theair space 144 can be any thickness that would allow air to flow from the entrance side 302 (FIG. 4) of thethermal decking 132 to theexhaust side 304 of thethermal decking 132. If more than oneupper spacer 142 is used, then thespacers 142 are spaced evenly across thefirst panel 134 and theradiant barrier 122. Theupper spacers 142 may be spaced apart about 16 inches to line up with the ceiling joists orspacers 142 may be spaced apart about 24 inches to line up with the rafters. Almost any number of multipleupper spacers 142 can be used and the spacing between each of them does not have to be equal or in any type of pattern. Theprimary air space 144 maybe in the range of about 0.05 inch to about 1 inch and is preferably approximately ¾ inch from theinside surface 128 of thefirst panel 134 to thetop side 124 of theradiant barrier 122. Approximately ¾″ has been determined to be the optimal air space to avoid eddies and static air spaces. Decking 132 has open opposite ends for air flow inair spaces 144 parallel tospacers 142. Theprimary air space 144 is a continuous conduit for the flow of air from an inlet 302 (FIG. 3) of thethermal decking 132 to anoutlet 304 of thethermal decking 132. - At least one
lower spacer 146 is positioned between theinside surface 130 of thesecond panel 138 and thebottom side 126 of theradiant barrier 122. Preferably, thelower spacer 146 is directly below theupper spacer 142 however thespacers lower spacer 146 can be any size but is preferably about 1″ thick, 2″ wide, and can be any length so long as a secondary chamber orair space 148 is created. The thickness of thesecondary air space 148 can be any thickness that would allow air to flow frominlet 302 of thethermal decking 132 to theoutlet 304 of thethermal decking 132. Thesecondary air space 148 may be in the range of about 0.05 inch to about 1 inch and is preferably approximately ¾ inch from theinside surface 130 of thesecond panel 138 to thebottom side 126 of theradiant barrier 122. The opposite ends ofsecondary air space 148 are also open for air flow inair space 148. Thesecondary air space 148 is a continuous conduit for the flow of air from inlet 302 (FIG. 4) tooutlet 304 and runs parallel with theprimary air space 144. - When
thermal decking 132 is installed such that thefirst panel 134 is next to a heat source, the twoair spaces second panel 138 and being transferred into the building. Heat from the heat source is conducted through thefirst panel 134 and either radiated offfoil 105 of theinside surface 128 of thefirst panel 134 and intoair space 144 or conducted due to convection currents in theprimary air space 144, where the heat is then dissipated due to the movement of air from theentrance side 302 to theexhaust side 304. The convection currents inair space 144 can conduct a small amount of the heat to thetop side 124 ofradiant barrier 122.Foil 105 ontop side 124 may reflect the heat back intoair space 144. Also, some of the heat from thetop side 124 ofradiant barrier 122 may conducted to thebottom side 126 ofradiant barrier 122, where it may be conducted to convection currents in thesecondary air space 148.Foil 105 oninside surface 130 reflects heat back intoair space 148. The heat withinair space 148 is then dissipated due to the movement of air from the entrance side 302 (FIG. 4) to theexhaust side 304 ofthermal decking 132. Decking 132 greatly reduces heat from reaching thesecond panel 138 and being radiated into the building. -
Thermal decking inlet 210 of thedecking 100 is in communication with asoffit area 202 of a standard roof to allow for intake of air from thesoffit area 202, throughinlet 210 and into theair space 116.Soffit area 202 is the conventional structure that encloses the edge portions of the roof.Soffit area 202 has anopening 203 through incoming air passes toinlet 210.Outlet 212 is an elongated opening preferably located at the peak of the roof.Outlet 212 is preferably a passageway extending along the peak of the roof, as illustrated in FIG. 6.Outlet 212 is in communication with the upper end of eachair space 116 and vents to atmosphere.Outlet 212 may be open along its length to atmosphere, in which case, the air may is moved solely by convection without any additional system to facilitate the movement of the air. Alternately, if desired, a rotary air moving device such as a wind driven or solar poweredturbine 206, electrically powered ridge vent 318 (FIG. 4), or similar system for moving air may be installed at the peak of the roof in communication withoutlet 212 ofthermal decking 100. Theturbine 206 draws air from theoutlet 212 of thethermal decking 100 and releases it into the surroundings. As theturbine 206 draws the air fromoutlet 212, a negative pressure in created inoutlet 212 and air is drawn through theair space 116 towardsoutlet 212. This creates a continuous air flow from thesoffit area 202, throughinlet 210, into theair space 116, and outoutlet 212. - At roof edge, the
second panel 108 may be cut at least 0.5 inch shorter than thefirst panel 102, leaving a portion of thefirst panel 102 extending past thesecond panel 108 to createinlet 210 for drawing air through theair space 116.Inlet 210 thus has a width the same distance the distance between two of thespacers 114. Theceiling structure 211 of the building may be conventional and preferably has conventional insulation located on it. - FIGS. 5 and 6 illustrate
thermal decking 100 installed at a hip joint of a roof. A centralenclosed passageway 213 extends upward along the ridge of the hip joint toexhaust passageway 212 located on the peak of the roof.Passageway 212 leads to an outlet, which may have aturbine 206. - Referring to FIG. 4,
thermal decking 132 could also be installed on conventional roof rafters in much the same manner as thethermal decking 100. If thethermal decking 132 is installed, then thesecond panel 138 and theradiant barrier 122 on theinlet side 302 may be cut at least 0.5 inch shorter thanupper decking 136, leaving a portion of thefirst panel 134 extending past thesecond panel 138 and theradiant barrier 122 to createinlet 301. As in the first embodiment,inlet 302 is located in asoffit area 301 that has anopening 303 for air to flow in toinlet 302. Aridge vent 304 may be installed atoutlet 304 on the ridge or peak of the roof to enhance air flow. - As shown in FIG. 4,
thermal decking thermal decking 132 would be orientated such that aninlet 316 is near the base or foundation of the house while theoutlet 318 is near thesoffit area 202 of the house.Inlets 316 are in communication withair spaces thermal decking 100 to create a natural draw to anoutlet 318 and intosoffit 301. Insoffit 301, the flow of air may continue from intoinlet 302 of thethermal decking 132 on the roof tooutlet 304 at the peak of the roof. Aconventional brick veneer 213, such as shown in FIG. 3, may be installed on the exterior of the wallthermal decking - An invention has been provided with several advantages. The thermal decking of the present invention is simple in design and economical to manufacture. It has improved insulation and heat transfer characteristics for residential or industrial buildings. The thermal decking does not have a dead air space wherein once the air space is heated, the heat is conducted into the building. Also, the present invention is more efficient and economical to use.
- Although the device of the invention herein described is intended primarily for use as decking on a roof, it should be recognized that the thermal decking can be used on any surface that needs superior insulating properties. While the foregoing description basically describes the preferred embodiment of an inventive device, it will be understood by those skilled in the art that modifications embodied in various forms may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (16)
1. A thermal decking comprising:
a first panel;
a second panel;
a plurality of spacers positioned between the first and second panels so as to create an air space between the first and second panels;
a pair of spaced-apart heat radiant layers of foil, each of the layers of foil having an exposed side located within the air space; and
an inlet to the air space at one end of the first and second panels and an outlet at an opposite end of the first and second panels to cause a flow of air from the inlet to the outlet.
2. The thermal decking of claim 1 , wherein the spacers are parallel to each other, each having one end at the inlet and an opposite end at the outlet.
3. The thermal decking of claim 1 , wherein the layers of foil are mounted to the first and second panels, with their exposed sides facing each other and the air space being located between the layers of foil.
4. The thermal decking of claim 1 , wherein the first and second panels are of plywood, the layers of foil being mounted to inside surfaces of the first and second panels, with their exposed sides facing each other and the air space being located between the layers of foil.
5. The thermal decking of claim 1 , further comprising a barrier panel located between and parallel to the first and second panels, dividing the air space into a primary air space and a secondary air space; and wherein
the layers of foil are mounted to opposite sides of the barrier panel.
6. The thermal decking of claim 1 , wherein the inlet and the outlet extend across a width of the panels.
7. In a building roof having an inclined supporting structure, with a lower edge and a peak, a roof decking installed on the supporting structure, comprising:
a first panel of plywood installed on the supporting structure and extending from the lower edge of the roof to the peak;
a second panel of plywood spaced above the first panel and extending from the lower edge of the roof to the peak;
a plurality of spacers positioned between the first and second panels so as to create an air space between the first and second panels, the spacers being parallel to each other and extending from the lower edge of the roof to the peak;
a pair of spaced apart heat radiant layers of foil, one of the layers of foil having an exposed surface facing generally upward and the other of the layers of foil having an exposed face facing generally downward, the exposed faces being located within the air space; and
an inlet to the air space at the lower edge of the roof and an outlet at the peak of the roof to cause a flow of air through the air space from the inlet to the outlet.
8. The roof according to claim 7 , further comprising a rotating air moving mechanism at the peak for enhancing the flow of air through the air space from the inlet to the outlet.
9. The roof according to claim 7 , wherein the layers of foil are mounted to the first and second panels, with their exposed sides facing each other and the air space being located between the layers of foil.
10. The roof according to claim 7 , further comprising a barrier panel located between and parallel with the first and second panels, dividing the air space into a primary air space and a secondary air space; and wherein
the layers of foil are mounted to opposite sides of the barrier panel.
11. A method for insulating a building, comprising:
(a) providing an insulating assembly having a first panel, a second panel, a plurality of spacers positioned between the first and second panels so as to create an air space between the first and second panels, a pair of spaced-apart heat radiant layers of foil, each of the layers of foil having an exposed side located within the air space, an inlet to the air space at one end of the first and second panels and an outlet at an opposite end of the first and second panels; and
(b) mounting the insulating assembly to the building and causing a flow of air through the air space from the inlet to the outlet.
12. The method according to claim 11 , wherein step (b) comprises mounting the insulating assembly to a supporting structure of a roof.
13. The method according to claim 11 , wherein step (b) comprises mounting the insulating assembly to an inclined supporting structure of a roof, with the inlet being located at a lower edge of the roof and the outlet being located at a peak of the roof.
14. The method according to claim 11 , wherein step (b) further comprises installing a rotary air moving mechanism to the building in communication with the outlet, and operating the rotary air moving mechanism to cause the air flow through the air space.
15. The method according to claim 11 , wherein step (b) comprises mounting the insulating assembly to a supporting structure of a vertical wall of the building and positioning the inlet adjacent a foundation of the building.
16. The method according to claim 11 , wherein step (b) comprises mounting the insulating assembly to an inclined supporting structure of a roof, with the inlet being located at a lower edge of the roof and the outlet being located at a peak of the roof; and
installing a rotary air moving mechanism at the peak of the building in communication with the outlet, and operating the rotary air moving mechanism to cause the air flow through the air space.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/041,804 US20030126806A1 (en) | 2002-01-08 | 2002-01-08 | Thermal deck |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/041,804 US20030126806A1 (en) | 2002-01-08 | 2002-01-08 | Thermal deck |
Publications (1)
Publication Number | Publication Date |
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US20030126806A1 true US20030126806A1 (en) | 2003-07-10 |
Family
ID=21918403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/041,804 Abandoned US20030126806A1 (en) | 2002-01-08 | 2002-01-08 | Thermal deck |
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US (1) | US20030126806A1 (en) |
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