Thermal Bypass Checklist RoundTable

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• Thermal Bypass Checklist Round-Table

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WHAT IS THERMAL BYPASS?
30o F
50o F
70o F
70o F
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WHAT THERMAL BYPASS LOOKS LIKE
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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.

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

• Doors to unconditioned spaces shall meet IECC
  insulation requirements for exterior doors and
  include full weatherstripping.

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

• 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)

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THERMAL BYPASS CHECKLIST 2. SHOWER/TUB EXTERIOR
WALL
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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!
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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES

• Key Areas
• Attic Knee Walls
• Double Walls
• Skylight Shafts
• Porches (TBC 14)

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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES
Double Walls
Heat
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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES
Courtesy of Consol
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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES
Courtesy of Consol
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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES
Courtesy of Consol
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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES
Skylight Shaft
Skylight
Attic
Air Barrier
Air Barrier
Insulation
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THERMAL BYPASS CHECKLIST 4. WALLS ADJOINING
UNCOND. SPACES
Tubular Skylight
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Exposed area 30 sq.ft. Need insulation and air
barrier
1.2 diamater x 3.1412 x 8 30 sq. ft. exposed
surface area
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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.
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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
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THERMAL BYPASS CHECKLIST 11. FIREPLACE SHAFT
WALL
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WRAP-UP

• Any other concerns?

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ANSWER...

• One more thought
• It wasnt raining when Noah built the Ark.
• Howard Duff

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HOW TO GET MORE INFORMATION

• On the Web at
• http//www.energystar.gov/homes