ATTIC CONDITIONING SYSTEM AND METHOD
A system for conditioning an attic of a building and venting a roof supported by a roof supporting structure. The system has a barrier isolating the roof supporting structure from an interior space of the attic. The barrier is sized to substantially cover an interior surface of the roof, the barrier isolating the interior surface of the roof from the interior space of the attic. A venting region is formed between the barrier and the interior surface of the roof, the venting region venting air from an outside of the building through the venting region and wherein the barrier substantially covering the interior surface of the roof prevents migration of air between the interior space of the attic and the venting region.
1. Field
The disclosed embodiments relate to an attic conditioning apparatus and method and, more particularly, to an attic conditioning and roof venting apparatus and method.
2. Brief Description of Earlier Developments
Home or commercial construction often has one or more attics above living or other suitable spaces. Typical construction may involve an attic with an insulated floor and an arrangement for venting the roof, for example, using a combination of soffit and ridge vents, gable vents or otherwise. Such an attic may be useful, for example, for storage or to house heating and ventilation equipment such as duct work, air conditioning units or otherwise. In the warm summer, a problem arises where the attic space becomes excessively heated by the sun causing heat to radiate into the living space below the attic and causing air conditioning systems to work excessively. In the cool winter, a problem arises where heat is lost through the attic from the living space resulting in heating systems running excessively and ice damming from a warm roof. Accordingly, there is a desire to reduce heating and cooling losses.
The foregoing aspects and other features of the exemplary embodiments are explained in the following description, taken in connection with the accompanying drawings, wherein:
Referring to
Structure 10 is shown having basement 20, first floor 24, second floor 26 and attic 28. Structure 10, is illustrated having a representative configuration, and as may be realized may have any suitable configuration in alternate embodiments. Basement 20 is shown for example, housing HVAC (Heating Venting and Air Conditioning unit) where HVAC unit 22 may distribute conditioned air through air ducts through the heated or air conditioned spaces of structure 10, for example through duct work 36 within the enclosed space of attic 28. HVAC unit 22 may, for example, condition floors 24 and 26 either alone or in combination. In alternate embodiments, HVAC unit 22 may be any suitable heating and/or cooling unit located within or remote with to any portion of structure 10. Attic 28 is located above the insulation 34 of ceiling 32 of second floor 26 of structure 10. The building structure 10B has roof supporting structure or rafters 38 covered by roof deck 40, 42. The roof deck 40, 42 and supporting structure 38 shall be referred to herein for convenience as the roof 40R. Rafters 38 may be wood framed, structural steel, trusses or any suitable structure suitable for supporting roof deck 40, 42. Roof deck 40, 42 may be have a plywood deck covered with shingles, metal roof or otherwise. In alternate embodiments, any suitable roof deck and material may be used. As seen in
The system 90 is shown having barrier 50, 52 separating the bottom 38B of the roof and its support structure, isolating the roof supporting structure 38 from an interior attic space 60 of attic 28. For example, the barrier may be insulated boards 50, 52 fastened to and isolating rafters 38 from interior space 60 of attic 28. The barrier 50, 52 may be sized to substantially cover an interior surface 92, 94 of the roof 40, 42, with the barrier isolating the interior surface 92, 94 of the roof 40, 42 from interior space 60 of attic 28. The barrier 50, 52 closes the interior attic space 60 from exterior air outside the building, as will be described further below. In addition, a similar barrier 54 may be provided on studs of an exterior wall of the attic. Here, barrier 54 may be applied to gable end walls or other structures or otherwise as a foam board barrier or other suitable barrier. Here, barrier 50, 52 may be insulated boards cut and sized to substantially cover an interior surface of the roof deck 40, 42 with the insulating boards isolating the roof 50, 52 deck from the interior space 60 of the attic 28. Here, insulated boards 40, 42 may initially be sized as 4 ft. by 8 ft. sheets and cut to size as needed to form the barrier. Alternately, any suitable sizes may be provided. Seals 64 may further be applied to the insulated boards 50, 52 with seals 64 arranged to seal seams 62 formed between adjoining edges of the insulated boards 50, 52. Seals 64 may further be applied, for example, between insulated boards and roof and ceiling rafters as required to seal enclosed attic space 60. Such as from exterior air outside the building. Here venting region 86 is formed between the insulating boards or barrier 50, 52 and the interior surface of roof 40, 42, the venting region 86 venting air 80 from an outside of the building 10 through the venting region 86. In the embodiment shown, the barrier or insulating boards 50, 52 are shown covering the interior surface 92, 94 of the roof deck 40, 42, substantially in the entirety of the surface from attic floor (e.g. ceiling 32) to top 60T of enclosed attic space 60. The barrier 54 thus prevents migration of air between the interior space of the attic and the venting region 86. Venting region 86 may comprise a void between the barrier 54 (e.g. boards 50, 52) and the interior surface of the roof 40, 42, the void 86 having openings communicating with the exterior air outside the building. As may be realized also from
System 90 converts the interior portion 60 of attic 28 into a clean and comfortable place making building 10 more comfortable. Here, system 90 reduces heating and cooling bills, and extends the life of the roof 40, 42 and makes attic 28 useful for storage. System 90 may for example make a home 10 warmer in winter and cooler in summer and reduces drafts. System 90 converts the attic 28 from a hot in the summer, cold in the winter vented attic to a comfortable unvented attic 90 while keeping a vented 86 roof. In a traditional vented attic, the attic floor is insulated with the ducts sealed but with air leaking into the attic interior space. Here, without system 90, the air and insulation boundary is at the attic floor. With system 90, the attic becomes part of the conditioned home as the air and insulation boundaries are on the bottom of the roof instead of the attic floor. Panels 50, 52, 54 may for example use Silverglo™ expanded polystyrene foam insulation board infused with graphite and having a radiant barrier on both sides to create an energy force field under the roof and above the attic interior space. In addition to the features above, system 90 reduces outside noise from traffic, weather or otherwise, provides a cleaner and brighter attic for storage. With the system 90, improved comfort results whereas without the system 90, temperature in the attic works against HVAC equipment 22 and ducts 36, for example, when the blower comes on in the hot summer or cold winter, air blows into the house and the equipment has to work longer and harder to overcome the temperatures. With the system 90, an overall improvement in the comfort of the home results particularly upstairs. System 90 facilitates the saving of energy, eliminating hostile attic temperatures in the winter and summer putting a cut into the amount of energy required to make a home comfortable. For example, the 4 way force field from the attic system may reduce heating and cooling costs by 30 percent or more. The system results in longer roof life and fewer repairs. For example, heat and moisture destroy equipment and building materials but system 90 extends the life of the roof by locating insulation along the bottom of the roof rafters instead of against the attic floor, the cooling effect of soffit, ridge and/or gable vents is maintained and an attic barrier combined with proper roof ventilation defends against damaging ice dams. Here, maintaining ventilation within region 86 extends the life of shingles and roofing material. Here, system 90 may generally provide a 4 way force field: (e.g. air sealing reduces stack effect of conditioned air rising through structure 10 and prevents air migration between interior attic space and outdoors; sealed insulation barrier 54 isolates the attic from the thermal effects from outdoors; radiant layer of barrier reflects the heat back; ducts 36 are no longer in hostile territory). With the use of system 90, attic floor air seals may be avoided; sealed can lights with air tight boxes may be avoided; attic hatch/door/scuttle seals may be avoided; any or additional attic floor insulation may be avoided; additional separate radiant barriers may be avoided or other suitable structure may be avoided.
Without system 90 in winter, the heating system runs more as compared with system 90 installed. For example, with outside temperature at about 25° F. or less, the lower floor 24 may be 65° F. and drafty. As volumes of air leak out of the top of structure 10, equal amounts of new air must be drawn in at the bottom of structure 10. The second floor 26 may be 68° F. and drafty. In attic 28, ducts 36 are in a very cold attic and heat from the ducts are lost; fiberglass insulation 34 is wind washed from cold ventilation air diminishing its ability to insulate dramatically. Ice damming occurs from a warming roof. In contrast, with system 90 installed in building 10, the lower floor 24 may be at about 70° F. and far less drafty as far less air is leaking out of the attic 28 and far less air leaks in the bottom of structure 10 to replace it. Second floor 26 may be about 72° F. and comfortable with no drafts. In the enclosed attic space 60 of attic 28, ducts 36 are in a warm attic where heat from the ducts are not lost; radiant heat is reflected and insulation resists heat flow with no gaps. Stored items in the interior region 60 of attic 28 are clean and do not freeze. The roof is cold with no ice damming from attic heat. The roof vents the roof and not the attic resulting in lower fuel bills.
Without system 90 in summer, the air conditioning system runs more and still can't keep up with the top floor 26 heat. For example, in the basement 20, there is more humidity and condensation. Outside temperature may be 85° F. where the sun heats the roofing to 150° F. and lower floor 24 may be humid and about 79° F. Here, warm humid air leaks in and relative humidity is increased as air is cooled making the space uncomfortable. The upper floor 26 may be about 85° F. and hot and very uncomfortable for sleeping. The drywall ceiling 32 heats up and heat from the attic 28 radiates into the rooms 26. The attic 28, may be about 130° F. and air conditioning ducts 36 in the attic are baking where air from the ducts leaks in and is lost. Heat form the roof 40, 42 radiates into the attic. In contrast, with system 90 in summer, there is less humidity and condensation in the basement 20. Lower floor 24 may be about 72° F. with less drafts and more comfortable as less air leaks out of the top. Less humid air leaks in with cooler less humid air making the space more comfortable. Upper floor 26 may be about 74° F. degrees and where cooler rooms are much more comfortable for sleeping. The drywall ceiling 32 is much cooler. The inter region 60 of attic 28 may be about 77° F. with the ducts 36 in a much cooler environment where cool air from duct leaks is not lost. Cooler air vents the excess heat out where only the space between the roof and the rafters is vented as opposed to the entire attic. Stored items in the interior region 60 of attic 28 do not get baked dusty and ruined and the attic can be used for storage. Sun heats roofing to 150 degrees but lower electric bills result.
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In accordance with one aspect of the exemplary embodiment, a system for conditioning an attic of a building and venting a roof supported by a roof supporting structure is provided. The system has a barrier separating a bottom of the roof supporting structure from an interior attic space defined by the roof and attic floor. The barrier covers the bottom of the roof support structure and an interior surface of the roof. The barrier isolates the interior attic space from the interior surface of the roof and closes the interior attic space from exterior air outside the building. The barrier forms a venting region between the barrier and the interior surface of the roof, the venting region communicating with exterior air outside the building venting exterior air outside the building through the venting region along the interior surface of the roof, and wherein the barrier prevents migration of air between the interior attic space and the venting region.
In accordance with another aspect of the exemplary embodiment, a system for conditioning an attic of a building and venting a roof deck supported by rafters is provided. The system has insulated boards fastened to and isolating the rafters from an interior attic space defined by the roof deck and attic floor. The insulated boards are cut and sized to cover an interior surface of the roof deck, substantially in its entirety from attic floor to a top of the interior attic space. Seals are applied to the insulated boards, the seals arranged to seal seams formed between adjoining edges of the insulated boards. The insulated boards and seals define a sealed barrier, closing the interior attic space from exterior air outside the building, isolating the roof deck from the interior space of the attic, and forming a venting region between the insulating boards and the interior surface of the roof deck, the venting region venting exterior air from outside the building through the venting region and wherein the sealed barrier prevents migration of air between the interior attic space and the venting region.
In accordance with another aspect of the exemplary method, a method of conditioning an attic of a building and venting a roof supported by a roof supporting structure is provided, the method comprising: covering a bottom of the roof supporting structure with a barrier that separates the bottom of the roof supporting structure from an interior attic space defined by the roof and attic floor sealing the barrier and with the barrier closing the interior attic space from exterior air outside the building and isolating and interior surface of the roof from the interior attic space; with the barrier forming a venting region between the barrier and the interior surface of the roof, the venting region venting exterior air from outside the building through the venting region; and preventing migration of air between the interior attic space and the venting region with the barrier.
In accordance with one or more aspects of the disclosed embodiment a system for conditioning an attic of a building and venting a roof supported by a roof supporting structure, the system comprising a barrier separating a bottom of the roof supporting structure from an interior attic space defined by the roof and attic floor. The barrier covers the bottom of the roof support structure and an interior surface of the roof so that the barrier isolates the interior attic space from the interior surface of the roof and closes the interior attic space from exterior air outside the building wherein, the barrier forms a venting region between the barrier and the interior surface of the roof, the venting region communicating with exterior air outside the building and venting exterior air outside the building through the venting region along the interior surface of the roof, and wherein the barrier prevents migration of air between the interior attic space and the venting region.
In accordance with one or more aspects of the disclosed embodiment wherein the venting region comprises a void between the barrier and the interior surface of the roof, the void having openings communicating with the exterior air outside the building and effecting natural ventilation through the venting region, wherein the void contains the roof supporting structure.
In accordance with one or more aspects of the disclosed embodiment wherein the barrier comprises an insulating layer and a radiant barrier layer.
In accordance with one or more aspects of the disclosed embodiment wherein the insulating layer comprises graphite infused polystyrene foam board having a radiant barrier on an interior surface and an exterior surface of the board that form the radiant barrier layer.
In accordance with one or more aspects of the disclosed embodiment wherein the barrier further isolates a soffit from the interior attic space of the attic.
In accordance with one or more aspects of the disclosed embodiment wherein the venting region vents air from a soffit vent through the venting region to at least one of a ridge vent and a gable vent.
In accordance with one or more aspects of the disclosed embodiment wherein the barrier comprises a radiant barrier layer and an insulation layer, the radiant barrier layer forming a base layer fastening the insulation layer to the roof support structure and being disposed between the insulation layer and the bottom of the roof support structure.
In accordance with one or more aspects of the disclosed embodiment wherein a system for conditioning an attic of a building and venting a roof deck supported by rafters, the system comprising insulated boards fastened to and isolating the rafters from an interior attic space defined by the roof deck and attic floor. The insulated boards cut and sized to cover an interior surface of the roof deck substantially in its entirety from attic floor to a top of the interior attic space, and seals applied to the insulated boards, the seals arranged to seal seams formed between adjoining edges of the insulated boards; wherein, the insulated boards and seals define a sealed barrier, closing the interior attic space from exterior air outside the building, isolating the roof deck from the interior space of the attic, and forming a venting region between the insulating boards and the interior surface of the roof deck, the venting region venting exterior air from outside the building through the venting region, and wherein the sealed barrier prevents migration of air between the interior attic space and the venting region.
In accordance with one or more aspects of the disclosed embodiment, wherein the venting region comprises a void between the insulated boards and the interior surface of the roof deck, the void being substantially open to the exterior air outside the building and containing the rafters.
In accordance with one or more aspects of the disclosed embodiment, wherein the insulated boards have a radiant barrier.
In accordance with one or more aspects of the disclosed embodiment, wherein the insulated boards comprise graphite infused polystyrene foam boards having a radiant barrier on an interior surface and an exterior surface of the insulated boards.
In accordance with one or more aspects of the disclosed embodiment, wherein the insulated boards isolate a soffit from the interior space of the attic.
In accordance with one or more aspects of the disclosed embodiment, wherein the venting region vents air from a soffit vent through the venting region to a ridge vent.
In accordance with one or more aspects of the disclosed embodiment, wherein the venting region vents air from a gable vent through the venting region to a ridge vent.
In accordance with one or more aspects of the disclosed embodiment, a method of conditioning an attic of a building and venting a roof supported by a roof supporting structure, the method comprising covering a bottom of the roof supporting structure with a barrier that separates the bottom of the roof supporting structure from an interior attic space defined by the roof and attic floor; sealing the barrier and with the barrier closing the interior attic space from exterior air outside the building and isolating an interior surface of the roof from the interior attic space with the barrier forming a venting region between the barrier and the interior surface of the roof, the venting region venting exterior air from outside the building through the venting region; and preventing migration of air between the interior attic space and the venting region with the barrier.
In accordance with one or more aspects of the disclosed embodiment, wherein the barrier comprises an insulating layer and a radiant barrier layer.
In accordance with one or more aspects of the disclosed embodiment,wherein the barrier comprises graphite infused polystyrene foam board having a radiant barrier on an interior surface and an exterior surface of the barrier.
In accordance with one or more aspects of the disclosed embodiment, further comprising isolating a soffit from the interior space of the attic with the barrier.
In accordance with one or more aspects of the disclosed embodiment, wherein the venting region vents air from a soffit vent through the venting region to a ridge vent.
In accordance with one or more aspects of the disclosed embodiment, wherein the venting region vents air from a gable vent through the venting region to a ridge vent.
It should be understood that the foregoing description is only illustrative of the invention. Various alternatives and modifications can be devised by those skilled in the art without departing from the invention. For example, some or all of the disclosed embodiments above may use voice control. By way of further example, some or all of the embodiments disclosed may operate in an automatic, semi automatic or manual power assisted mode. Accordingly, the present invention is intended to embrace all such alternatives, modifications and variances.
Claims
1. A system for conditioning an attic of a building and venting a roof supported by a roof supporting structure, the system comprising:
- a barrier separating a bottom of the roof supporting structure from an interior attic space defined by the roof and attic floor; and
- the barrier covers the bottom of the roof support structure and an interior surface of the roof so that the barrier isolates the interior attic space from the interior surface of the roof and closes the interior attic space from exterior air outside the building;
- wherein, the barrier forms a venting region between the barrier and the interior surface of the roof, the venting region communicating with exterior air outside the building and venting exterior air outside the building through the venting region along the interior surface of the roof, and wherein the barrier prevents migration of air between the interior attic space and the venting region.
2. The system of claim 1 wherein the venting region comprises a void between the barrier and the interior surface of the roof, the void having openings communicating with the exterior air outside the building and effecting natural ventilation through the venting region, wherein the void contains the roof supporting structure.
3. The system of claim 1, wherein the barrier comprises an insulating layer and a radiant barrier layer.
4. The system of claim 3, wherein the insulating layer comprises graphite infused polystyrene foam board having a radiant barrier on an interior surface and an exterior surface of the board that form the radiant barrier layer.
5. The system of claim 1, wherein the barrier further isolates a soffit from the interior attic space of the attic.
6. The system of claim 1, wherein the venting region vents air from a soffit vent through the venting region to at least one of a ridge vent and a gable vent.
7. The system of claim 1, wherein the barrier comprises a radiant barrier layer and an insulation layer, the radiant barrier layer forming a base layer fastening the insulation layer to the roof support structure and being disposed between the insulation layer and the bottom of the roof support structure.
8. A system for conditioning an attic of a building and venting a roof deck supported by rafters, the system comprising:
- insulated boards fastened to and isolating the rafters from an interior attic space defined by the roof deck and attic floor;
- the insulated boards cut and sized to cover an interior surface of the roof deck substantially in its entirety from attic floor to a top of the interior attic space, and
- seals applied to the insulated boards, the seals arranged to seal seams formed between adjoining edges of the insulated boards;
- wherein, the insulated boards and seals define a sealed barrier, closing the interior attic space from exterior air outside the building, isolating the roof deck from the interior space of the attic, and forming a venting region between the insulating boards and the interior surface of the roof deck, the venting region venting exterior air from outside the building through the venting region, and wherein the sealed barrier prevents migration of air between the interior attic space and the venting region.
9. The system of claim 8, wherein the venting region comprises a void between the insulated boards and the interior surface of the roof deck, the void being substantially open to the exterior air outside the building and containing the rafters.
10. The system of claim 8, wherein the insulated boards have a radiant barrier.
11. The system of claim 8, wherein the insulated boards comprise graphite infused polystyrene foam boards having a radiant barrier on an interior surface and an exterior surface of the insulated boards.
12. The system of claim 8, wherein the insulated boards isolate a soffit from the interior space of the attic.
13. The system of claim 8, wherein the venting region vents air from a soffit vent through the venting region to a ridge vent.
14. The system of claim 8, wherein the venting region vents air from a gable vent through the venting region to a ridge vent.
15. A method of conditioning an attic of a building and venting a roof supported by a roof supporting structure, the method comprising:
- covering a bottom of the roof supporting structure with a barrier that separates the bottom of the roof supporting structure from an interior attic space defined by the roof and attic floor;
- sealing the barrier and with the barrier closing the interior attic space from exterior air outside the building and isolating an interior surface of the roof from the interior attic space;
- with the barrier forming a venting region between the barrier and the interior surface of the roof, the venting region venting exterior air from outside the building through the venting region; and
- preventing migration of air between the interior attic space and the venting region with the barrier.
16. The method of claim 16, wherein the barrier comprises an insulating layer and a radiant barrier layer.
17. The method of claim 16, wherein the barrier comprises graphite infused polystyrene foam board having a radiant barrier on an interior surface and an exterior surface of the barrier.
18. The method of claim 15, further comprising isolating a soffit from the interior space of the attic with the barrier.
19. The method of claim 15, wherein the venting region vents air from a soffit vent through the venting region to a ridge vent.
20. The method of claim 15, wherein the venting region vents air from a gable vent through the venting region to a ridge vent.
21. The system of claim 7, wherein a radiant barrier of the radiant barrier layer has a reflective surface facing outward.
22. The system of claim 7, wherein a radiant barrier of the radiant barrier layer has a reflective surface facing inward.
23. The system of claim 3, wherein the radiant barrier layer has a radiant barrier with a reflective surface facing outward, and another radiant barrier with a reflective surface facing inwards.
Type: Application
Filed: Mar 20, 2012
Publication Date: Sep 26, 2013
Inventor: Lawrence M. Janesky (Middlebury, CT)
Application Number: 13/425,005
International Classification: F24F 7/00 (20060101); E04F 17/04 (20060101);