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Thermal Bypass Checklist Round-Table Thermal Bypass Checklist Round-Table.

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Presentation on theme: "Thermal Bypass Checklist Round-Table Thermal Bypass Checklist Round-Table."— Presentation transcript:

1 Thermal Bypass Checklist Round-Table Thermal Bypass Checklist Round-Table

2 WHAT IS THERMAL BYPASS? 70 o F 30 o F 50 o F

3 WHAT THERMAL BYPASS LOOKS LIKE

4 GENERAL Builder not required to sign checklist if he/she has not verified any items. Builder not required to sign checklist if he/she has not verified any items. Maximum of four items allowed for builder refers to numbered items, not bullets. Maximum of four items allowed for builder refers to numbered items, not bullets.

5 THERMAL BYPASS CHECKLIST: 1. INSULATION ALIGNMENT Insulated sloped ceilings: Air barrier required except if closed cell spray foam

6 THERMAL BYPASS CHECKLIST: 1. INSULATION ALIGNMENT Doors to unconditioned spaces shall meet IECC insulation requirements for exterior doors and include full weatherstripping.

7 THERMAL BYPASS CHECKLIST: 1. INSULATION ALIGNMENT Slab Edge Insulation: (Climate Zones 4 and higher) InteriorExterior Plan for Flooring!!!

8 Band Joists: Highly encourage, but dont require complete air barrier detail except: – Garage/House Interface (Item #1) – Cantilevered Floor (Item #6) – Porch Roof (Item #12) THERMAL BYPASS CHECKLIST: 1. INSULATION ALIGNMENT

9 THERMAL BYPASS CHECKLIST: 2. SHOWER/TUB EXTERIOR WALL

10 THERMAL BYPASS CHECKLIST: 3. INSULATED FLOOR OVER GARAGE Improper insulation! It must touch the surface it is intended to insulate. Critical to check for air gap!

11 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Key Areas: Attic Knee Walls Attic Knee Walls Double Walls Double Walls Skylight Shafts Skylight Shafts Porches (TBC # 14) Porches (TBC # 14)

12 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Double Walls Air Barrier Heat

13 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Courtesy of Consol

14 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Courtesy of Consol

15 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Courtesy of Consol

16 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Skylight Air Barrier Attic Insulation Skylight Shaft

17 THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES 14 Exposed area = ~30 sq.ft. Need insulation and air barrier Tubular Skylight 1.2 diamater x x 8 = 30 sq. ft. exposed surface area

18 THERMAL BYPASS CHECKLIST: 6. CANTILEVERED FLOOR Thermal Bypass Tips: Consider spray foam insulation installed to desired thickness because it can serve as both insulation and an air barrier. Critical to check air gap at floor. Seal Edges Fill with InsulationAddBlocking

19 THERMAL BYPASS CHECKLIST: 8. FLUE SHAFT Image courtesy of EnergyLogic TIP: Specially colored fire-rated foam now available for sealing difficult air gaps at flue openings

20 THERMAL BYPASS CHECKLIST: 11. FIREPLACE SHAFT WALL

21 WRAP-UP Any other concerns?

22 ANSWER... One more thought… It wasnt raining when Noah built the Ark. Howard Duff

23 HOW TO GET MORE INFORMATION On the Web at:http://www.energystar.gov/homes


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