thermal bypass checklist round-table thermal bypass checklist round-table
TRANSCRIPT
Thermal Bypass Thermal Bypass Checklist Checklist
Round-TableRound-Table
WHAT IS THERMAL BYPASS?WHAT IS THERMAL BYPASS?
7070o o FF
7070o o FF
3030o o FF
5050o o FF
WHAT THERMAL BYPASS LOOKS LIKEWHAT THERMAL BYPASS LOOKS LIKE
GENERALGENERAL
Builder not required to sign Builder not required to sign checklist if he/she has not checklist if he/she has not verified any items.verified any items.
Maximum of four items allowed Maximum of four items allowed for builder refers to numbered for builder refers to numbered items, not bullets. items, not bullets.
THERMAL BYPASS CHECKLIST: THERMAL BYPASS CHECKLIST:
1. INSULATION ALIGNMENT1. INSULATION ALIGNMENT
Insulated Insulated sloped sloped ceilings:ceilings: Air barrier Air barrier required required except if except if closed cell closed cell spray foamspray foam
THERMAL BYPASS CHECKLIST: THERMAL BYPASS CHECKLIST:
1. INSULATION ALIGNMENT1. INSULATION ALIGNMENT
Doors to Doors to unconditioned unconditioned spaces shall meet spaces shall meet IECC insulation IECC insulation requirements for requirements for exterior doors and exterior doors and include full include full weatherstripping.weatherstripping.
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 1. INSULATION ALIGNMENT1. INSULATION ALIGNMENT
Slab Edge Insulation:Slab Edge Insulation:(Climate Zones 4 and higher)(Climate Zones 4 and higher)
InteriorInteriorExteriorExterior
Plan for Flooring!!!Plan for Flooring!!!
Band Joists:Band Joists:
Highly encourageHighly encourage,, but don’t require complete air barrier detail but don’t require complete air barrier detail
except:except:– Garage/House Interface (Item #1)Garage/House Interface (Item #1)– Cantilevered Floor (Item #6) Cantilevered Floor (Item #6) – Porch Roof (Item #12)Porch Roof (Item #12)
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 1. INSULATION ALIGNMENT1. INSULATION ALIGNMENT
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 2. SHOWER/TUB EXTERIOR WALL2. SHOWER/TUB EXTERIOR WALL
THERMAL BYPASS CHECKLIST: THERMAL BYPASS CHECKLIST:
3. INSULATED FLOOR OVER 3. INSULATED FLOOR OVER GARAGEGARAGE
Improper Improper insulation! insulation! It must touch It must touch the surface it the surface it is intended to is intended to insulate. insulate. Critical to Critical to check for air check for air gap!gap!
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
Key Areas:Key Areas: Attic Knee WallsAttic Knee Walls Double WallsDouble Walls Skylight ShaftsSkylight Shafts Porches (TBC # 14)Porches (TBC # 14)
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
Double WallsDouble Walls
Air BarrierAir Barrier
HeaHeatt
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
Courtesy of Consol Courtesy of Consol
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
Courtesy of Consol Courtesy of Consol
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
Courtesy of Consol Courtesy of Consol
THERMAL BYPASS CHECKLIST: THERMAL BYPASS CHECKLIST:
4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
SkylightSkylight
Air BarrierAir Barrier Air BarrierAir Barrier
AtticAttic
InsulatiInsulationon
Skylight ShaftSkylight Shaft
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST:
4. WALLS ADJOINING UNCOND. SPACES4. WALLS ADJOINING UNCOND. SPACES
14”14”
Exposed area = ~30 sq.ft.Exposed area = ~30 sq.ft.Need insulation and air barrier Need insulation and air barrier
Tubular SkylightTubular Skylight
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST: 6. CANTILEVERED FLOOR6. CANTILEVERED FLOOR
Thermal Thermal BypassBypass
Thermal Thermal BypassBypass
Tips:Tips:Consider spray Consider spray foam insulation foam insulation installed to installed to desired thickness desired thickness because it can because it can serve as both serve as both insulation and an insulation and an air barrier.air barrier.Critical to Critical to check air gap check air gap at floor.at floor.
Seal EdgesSeal Edges
Fill withFill withInsulationInsulation
AddAddBlockingBlocking
THERMAL BYPASS CHECKLIST:THERMAL BYPASS CHECKLIST:
8. FLUE SHAFT8. FLUE SHAFT
Image courtesy of EnergyLogic
TIP:TIP:Specially Specially
colored fire-colored fire-rated foam now rated foam now
available for available for sealing difficult sealing difficult air gaps at flue air gaps at flue
openingsopenings
THERMAL BYPASS CHECKLIST: THERMAL BYPASS CHECKLIST:
11. FIREPLACE SHAFT WALL11. FIREPLACE SHAFT WALL
WRAP-UPWRAP-UP
Any other concerns?Any other concerns?
ANSWER...ANSWER...
One more thought…One more thought…
““It wasn’t raining It wasn’t raining when Noah built when Noah built the Ark.”the Ark.”
Howard DuffHoward Duff
HOW TO GET MORE INFORMATIONHOW TO GET MORE INFORMATION
On the Web at:http://www.energystar.gov/homeshttp://www.energystar.gov/homes