US20100236172A1 - Framing system and components with built-in thermal break - Google Patents
Framing system and components with built-in thermal break Download PDFInfo
- Publication number
- US20100236172A1 US20100236172A1 US12/406,474 US40647409A US2010236172A1 US 20100236172 A1 US20100236172 A1 US 20100236172A1 US 40647409 A US40647409 A US 40647409A US 2010236172 A1 US2010236172 A1 US 2010236172A1
- Authority
- US
- United States
- Prior art keywords
- framing
- insulation
- structural
- wood
- component
- 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
- 238000009432 framing Methods 0.000 title claims abstract description 49
- 238000009413 insulation Methods 0.000 claims abstract description 41
- 239000002023 wood Substances 0.000 claims abstract description 15
- 239000000463 materials Substances 0.000 claims abstract description 6
- 239000007787 solids Substances 0.000 claims description 8
- 239000011120 plywood Substances 0.000 claims description 6
- 229920002522 Wood fibre Polymers 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N ethyl urethane Chemical compound 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CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
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- 239000002025 wood fibers Substances 0.000 claims description 3
- 239000006261 foam materials Substances 0.000 claims description 2
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Images
Classifications
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- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge modular coordination
- E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge modular coordination assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
- E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge modular coordination assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
- E04B2/7412—Posts or frame members specially adapted for reduced sound or heat transmission
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/90—Passive houses; Double facade technology
Abstract
Framing component with built-in-thermal break, comprising a structural member and an insulation member secured to the structural member on an inside of a building, the structural member being made in wood, the insulation member being made in a thermal break material; the structural member and the insulation member forming a one-piece insulated framing component, a bearing depth of the component being smaller than a bearing depth of the wall.
Description
- The present invention relates to framing systems. More specifically, the present invention is concerned with a framing system and components with built-in thermal break.
- Standard construction today in residential and light commercial wood framing uses either 2×4 or 2×6 solid lumbers spaced 16″ on center. Energy conservation concerns and building codes have forced most builders to frame exterior wall with 2×6's. Framing requirements (roof loads, carry beams, headers) and details (window and door openings, inside and outside corners, wall intersections) greatly increase the amount of solid wood in an exterior wall. The United States national average is 25 percent of the wall as a solid wood framing.
- Thermal bridges are points in the building envelope that allow heat conduction to occur. Since heat flows through the path of least resistance, thermal bridges can contribute to poor energy performance. A thermal bridge is created when materials create a continuous path across a temperature difference, in which the heat flow is not interrupted by thermal insulation.
- A common construction design is based on stud walls, in which wood studs, plates, headers, or any other framing members in an exterior wall, may constitute thermal bridges. There is a relationship between the “framing factor” (framing percentage) and the “framing effect” in any insulated wall. As the framing factor increases the amount of insulation decreases and, since the insulation has a much higher R-value (thermal resistance, or R, ru, R-factor, R-value) than the framing member, the thermal efficiency of the wall suffers.
- Thermal bridges through wood framing members have been a concern for some time now and manufacturers provide wood framing systems developed to reduce them (see
FIGS. 1 c and 1 d). A most common system comprises wrapping the entire exterior of the building in rigid insulation to eliminate the heat loss through the wood framing members. This system requires that the builder makes multiple trips around the building, which greatly increases labor costs. Moreover, it also increases the wall thickness, resulting in more expensive window and door jambs extension for example. -
FIGS. 1 illustrates conventional framework components, such as conventional headers for 2×6 walls, for example. Typically, such headers are made of beams (B) of solid wood alternating with layers of plywood (P) (seeFIG. 1 a) or laminated veneer lumbers (LVL) for larger spans (seeFIG. 1 b). Insulated headers can also be found, comprising a foam insulation (I) sandwiched between two laminated veneer lumbers (LVL) or two laminated strand lumbers (LSL) (FIGS. 1 c and 1 d). - Other wall systems such as ICF (insulated concrete forms) and SIP (structural insulated panels) have also been developed and marketed as being more energy efficient because they reduce the amount of thermal bridging that exist in wood framing.
- There is still a need in the art for a framing system and components, with built-in thermal break.
- More specifically, there is provided a framing component with built-in-thermal break for a wall of a building, comprising: a structural member; and an insulation member secured to the structural member on an inside of the building; wherein the structural member is made in wood, the insulation member is made in a thermal break material; the structural member and the insulation member forming a one-piece insulated framing component, a bearing depth of the component being smaller than a bearing depth of the wall.
- There is further provided a framing system comprising at least one component with built-in-thermal break for a wall of a building, comprising: a structural member; and an insulation member secured to the structural member on an inside of the building; wherein the structural member is made in wood, the insulation member is made in a thermal break material; the structural member and the insulation member forming a one-piece insulated framing component, a bearing depth of the component being smaller than a bearing depth of the wall.
- Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of embodiments thereof, given by way of example only with reference to the accompanying drawings.
- In the appended drawings:
-
FIGS. 1 illustrate framing components of the prior art: a) headers made of beams of solid wood alternating with layers of plywood; b) headers made of laminated veneer lumbers; c) insulated headers comprising a foam insulation sandwiched between laminated veneer lumbers; and d) insulated headers comprising a foam insulation sandwiched between laminated strand lumbers; -
FIG. 2 a) shows a detail of a framework structure according to an embodiment of the present invention;FIG. 2 b) shows a detail of a stud according to an embodiment of the present invention;FIG. 2 c) shows a detail of a header according to an embodiment of the present invention; andFIG. 2 d) shows a detail of a plate according to an embodiment of the present invention; -
FIG. 3 shows a header and a stud assembled according to an embodiment of the present invention; -
FIG. 4 shows a stud and a plate assembled according to an embodiment of the present invention; -
FIG. 5 shows a system according to an embodiment of the present invention; -
FIG. 6 shows a detail of a door framing, according to an embodiment of the present invention; and -
FIG. 7 shows a system according to a further embodiment of the present invention. - There is provided a complete framing system including studs, plates, and headers, all designed to work together with a continuous structural load path, an insulation plane, and a nailer plane (see
FIG. 2 a). - As illustrated in
FIGS. 2 b, 2 c and 2 d, a stud 20, a header 40 and a plate 60 generally each comprises an insulation member 24 sandwiched between a structural member 22 and a support 26. - The structural member 22 is typically a wood member, which provides the strength needed to support load. It can be made in a range of lumber species or engineering lumbers, such as, for example, solid sawn lumber, spruce-pine-fir (spf), Douglas fir (df), Hem-fir (Hf), or finger jointed or engineered LVL (laminated veneer lumber), plywood, oriented strand board (OSB).
- The insulation member 24 is a thermal break material, generally a poor conductor of heat. Typically, the insulation member 24 is a rigid foam material, providing thermal insulation. Spray urethane may be used as both an adhesive and the insulation if used in an injection-type process.
- Combined strands of wood fiber and insulation may be extruded together into a single piece of framing combining the properties of both members 22 and 24, i.e. the strength required to support the load and the insulating thermal properties required.
- The support 26 is a non-structural component, merely covering the insulation member 24, on the inside of the building. It acts as a nailer for the interior wall finishes, such as drywalls, boards, trims or moldings, for example, and electrical boxes. It can be made of OSB, plywood, lumber or engineered wood.
- As a result, each one of the stud 20, header 40 and plate 60 are a one-piece insulated structural member.
- These members may be glued together, or secured together using mechanical fastening such as nails or screws, although this may cause a problem when the builder hits a nail or a screw while cutting the members for in-situ installation. Additionally, metal fasteners may create a thermal bridge for heat loss.
- Due to the unique properties of urethane, as mentioned hereinabove, it can be used as the adhesive for securing the members together, while forming the insulation 24.
- It could be contemplated not using any support 26, as discussed hereinbelow in relation to
FIG. 7 . - A system according to an embodiment of the present invention may thus comprise a 31/2″ lumber as the structural member 22, an 11/2″ insulation foam as the insulation member 24, and a ½″ piece of OSB as the support 26, for a total assembly of 51/2″. Such an assembly matches a 2×6 framing. Clearly, as people in the art may appreciate, all dimensions can be modified.
- As people in the art will appreciate, the header 40 structure matches the stud 20 load capacity, which varies across a depth thereof. The header is dimensioned according to the thickness of the wall, i.e. a 2×4 wall has a 31/2″ wide header, and a 2×6 wall has 51/2″ wide header. However, owing to the structure of the header 40 as just described above, the bearing depth is smaller than the thickness of the wall.
- By using the structures of the header 40 and the stud 20 above, all the load capacity of the structural member 22′ of the header 40 (see arrows A) is picked up by the stud 20 (see arrows B), as shown in
FIG. 3 . - Similarly, as shown in
FIG. 4 , once assembled, the structural member 22″, the insulation member 24″ and the support 26″ of the plate 60 fit with the structural member 22, the insulation member 24 and the support 26 of the stud 20, respectively. - As people in the art will appreciate, the present system creates a thermal break for each member component of the wall framing.
- The R-value of the framing components is increased from 5.5 to 11.5 compared to conventional studs, headers or plates. Thermal bridging is virtually eliminated and the thermal efficiency of the wall system as a whole is vastly improved, as shown in Table I below.
-
TABLE I Increase Framing Conventional Framing of the in thermal Percentage Framing present invention efficiency 30% R-12.3 R-16.9 +27.2% 25% R-13.2 R-17.4 +25.4% 20% R-14.1 R-17.9 +20.9% - The present system allows insulating all exterior wall framing components, studs, plates and headers in a wood frame construction. The fabrication of each framing component can be done in a mill and then the assembled components can be shipped to clients.
- The present system improves the energy performance in residential buildings, at a constant wall depth. It is found that the additional cost involved when using the present system is small, with a short payback period, especially since the price of energy increases.
- Moreover, because the foam insulation 24 and the OSB 22 are very dimensionally stable compared to solid lumber, the likeliness of drywall callbacks from nail pops for example, is reduced.
- The present system is easy for electricians to wire. Moreover, it is found to reduce sound transmission from outside.
- The above advantages are provided without builders having to change the way they currently build. They only find that the walls are lighter. Indeed, based on a content density of wood species, a 2×6 wall according to an embodiment of the present invention may be about 25% lighter than a conventional 2×4 wall, since 27% of the structural wood member is replaced with light weight foam insulation, for example.
- The frame components as described hereinabove may be interchangeable with conventional framing components if needed. For instance, as illustrated in
FIG. 5 , in the case of a point load from a carry beam 50 or girder above a stud, the load may be such that a 2×6 stud is required. Then a conventional 2×6 stud (label 100) can be used in the same wall with insulated framing provided that the plates 600 are conventional 2×6 plates above and below the point load, since the bearing of the plate must match the bearing capacity of the stud. - Other place where conventional framing may be interchanged is at door framing, particularly in swing doors. As shown in
FIG. 6 , screws 110 in top hinges may be of a length such that they hit the jack stud, while other screws only go into the jamb. Thus, it may happen that long hinge screws 110 do not hit anything structural, only foam. Moreover, on the other side of the door is the lock and possibly a deadbolt, the strikes of all deadbolt being attached to the jack studs with long screws that may also hit nothing but foam. Blocking 120 may be used to accommodate the hinge and lock screws mentioned hereinabove. Alternatively, a conventional stud 100 could be used. - In an embodiment illustrated in
FIG. 7 , the system only uses structural members 22 and insulation members 24. In the case of a 2×4 structural member 22, the foam 24 would be 2″ in order to make the assembly 51/2″, which, as people in the art will appreciate, is the shallowest depth possible when using fiberglass insulation to meet minimum building codes in North America for example. With the foam insulation 22 2″ thick and a drywall 50 of 1/2″, screws 115 required to hold the drywall 50 need to be of a minimum of 31/2″. Similarly, electrical boxes 55 need long screw 117, probably 3″. - There is thus provided a framing system with built-in-thermal break, which improves the thermal efficiency of a building envelope. The present framing system increases R-value and energy efficiency of homes and wood frame building structures, therefore lowering heating and cooling costs and conserving natural resources. This system improves the energy performance of most wood framing and insulation systems that currently exist.
- Although the present invention has been described hereinabove by way of embodiments thereof, it may be modified, without departing from the nature and teachings of the subject invention as defined in the appended claims.
Claims (12)
1. A framing member with built-in-thermal break for a wall of a building, comprising:
a structural member; and
an insulation member secured to said structural member on an inside of the building;
wherein said structural member is made in wood, said insulation member is made in a thermal break material; said structural member and said insulation member forming a one-piece insulated framing component, a bearing depth of the component being smaller than a bearing depth of the wall.
2. The framing member of claim 1 , further comprising a nailer member covering the insulation member on the inside of the building.
3. The framing member of claim 1 , wherein said structural member is made in a range of lumber species or engineering lumber.
4. The framing member of claim 1 , wherein said structural member is selected in the group comprising solid sawn lumbers, finger jointed and engineered LVL (laminated veneer lumber), plywood and oriented strand boards (OSB).
5. The framing member of claim 1 , wherein said insulation member comprises a rigid foam material.
6. The framing member of claim 1 , wherein said insulation member comprises urethane.
7. The framing member of claim 1 , wherein said members are glued together.
8. The framing member of claim 1 , wherein said structural member is formed by strands of wood fiber, said strands of wood fiber and said insulation is extruded together into the one-piece insulated framing component.
9. The framing member of claim 2 , wherein said nailer member is selected in the group consisting OSB, plywood, lumber and engineered wood.
10. The framing member of claim 1 , wherein said component is one of a stud, a header and a plate.
11. The framing member of claim 1 , having an R-value reaching 11.5.
12. A framing system comprising at least one member as recited in claim 1 .
Priority Applications (1)
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US12/406,474 US20100236172A1 (en) | 2009-03-18 | 2009-03-18 | Framing system and components with built-in thermal break |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US12/406,474 US20100236172A1 (en) | 2009-03-18 | 2009-03-18 | Framing system and components with built-in thermal break |
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US20100236172A1 true US20100236172A1 (en) | 2010-09-23 |
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US12/406,474 Abandoned US20100236172A1 (en) | 2009-03-18 | 2009-03-18 | Framing system and components with built-in thermal break |
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Cited By (13)
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US20110173912A1 (en) * | 2007-12-05 | 2011-07-21 | Dunn Randolph A | Extruded cylinder with a solid wood exterior shell |
US20110177265A1 (en) * | 2010-01-19 | 2011-07-21 | Souhegan Wood Products, Inc. | Structural cylinder with conformable exterior |
US8516778B1 (en) * | 2012-05-14 | 2013-08-27 | Lester B. Wilkens | Insulated wall stud system |
US8826616B1 (en) | 2013-05-01 | 2014-09-09 | Les Portes J.P.R. Inc. | Metal profile with thermal break |
WO2014197972A1 (en) * | 2013-06-11 | 2014-12-18 | Eric De Waal | Construction framing member with integrated thermal break and method for manufacturing same |
US9103113B2 (en) | 2010-03-31 | 2015-08-11 | Stacy L. Lockhart | Wall stud with a thermal break |
US20160138267A1 (en) * | 2014-11-19 | 2016-05-19 | Richard Ettinger | Polyurethane foam building members for residential and/or commercial buildings |
US9677264B2 (en) * | 2015-07-10 | 2017-06-13 | Roosevelt Energy, Llc | Thermal break wood stud with rigid insulation and wall framing system |
US9783985B2 (en) * | 2015-07-10 | 2017-10-10 | Roosevelt Energy, Llc | Thermal break wood stud with rigid insulation with non-metal fasteners and wall framing system |
US20190145092A1 (en) * | 2016-11-30 | 2019-05-16 | Iida Sangyo Co., Ltd. | Construction and method for constructing same |
USD876208S1 (en) | 2017-09-08 | 2020-02-25 | Souhegan Wood Products Inc. | Winding core |
US10731332B1 (en) | 2019-08-28 | 2020-08-04 | Roosevelt Energy, Llc | Composite reinforced wood stud for residential and commercial buildings |
US10807829B2 (en) | 2016-09-14 | 2020-10-20 | Souhegan Wood Products Inc. | Reinforced wood fiber core |
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US9677264B2 (en) * | 2015-07-10 | 2017-06-13 | Roosevelt Energy, Llc | Thermal break wood stud with rigid insulation and wall framing system |
US9783985B2 (en) * | 2015-07-10 | 2017-10-10 | Roosevelt Energy, Llc | Thermal break wood stud with rigid insulation with non-metal fasteners and wall framing system |
US10807829B2 (en) | 2016-09-14 | 2020-10-20 | Souhegan Wood Products Inc. | Reinforced wood fiber core |
US20190145092A1 (en) * | 2016-11-30 | 2019-05-16 | Iida Sangyo Co., Ltd. | Construction and method for constructing same |
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