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Thermal Bypass Checklist Round-Table

Thermal Bypass Checklist Round-Table. WHAT IS THERMAL BYPASS?. 30 o F. 50 o F. 70 o F. 70 o F. WHAT THERMAL BYPASS LOOKS LIKE. GENERAL. Builder not required to sign checklist if he/she has not verified any items.

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Thermal Bypass Checklist Round-Table

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  1. Thermal Bypass Checklist Round-Table

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

  3. WHAT THERMAL BYPASS LOOKS LIKE

  4. GENERAL • 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.

  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) Plan for Flooring!!! Exterior Interior

  8. THERMAL BYPASS CHECKLIST:1. INSULATION ALIGNMENT Band Joists: Highly encourage, but don’t require complete air barrier detail except: • Garage/House Interface (Item #1) • Cantilevered Floor (Item #6) • Porch Roof (Item #12)

  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 • Double Walls • Skylight Shafts • Porches (TBC # 14)

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

  17. THERMAL BYPASS CHECKLIST:4. WALLS ADJOINING UNCOND. SPACES Tubular Skylight 14” Exposed area = ~30 sq.ft. Need insulation and air barrier 1.2’ diamater x 3.1412 x 8’ = 30 sq. ft. exposed surface area’

  18. Add Blocking Fill with Insulation Thermal Bypass Thermal Bypass Seal Edges THERMAL BYPASS CHECKLIST:6. CANTILEVERED FLOOR 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.

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

  20. THERMAL BYPASS CHECKLIST: 11. FIREPLACE SHAFT WALL

  21. WRAP-UP Any other concerns?

  22. ANSWER... One more thought… “It wasn’t 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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