Thermal Bypass Checklist RoundTable WHAT IS THERMAL BYPASS

Thermal Bypass Checklist Round-Table

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

WHAT THERMAL BYPASS LOOKS LIKE

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.

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

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

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

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)

THERMAL BYPASS CHECKLIST: 2. SHOWER/TUB EXTERIOR WALL

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!

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

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

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

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

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

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

THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES Tubular Skylight 14” Exposed area = ~30 sq. ft. Need insulation and air barrier

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

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 Energy. Logic

THERMAL BYPASS CHECKLIST: 11. FIREPLACE SHAFT WALL

WRAP-UP Any other concerns?

ANSWER. . . One more thought… “It wasn’t raining when Noah built the Ark. ”

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