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Desired Outcome:
Desired Outcome:
Establish a continuous air barrier at the thermal boundary in the attic.
Establish a continuous air barrier at the thermal boundary in the attic.
SWS Detail: 3.0101 General Air Sealing; 3.0102 Specific Air Sealing
Author: Jake Leifson
Before
Before
Attic not air sealed
After
After
Attic air sealed
Steps
Steps
1. Remove existing insulation
1. Remove existing insulation
Remove existing insulation as needed.
2. Remove dust and debris
2. Remove dust and debris
Sweep or vacuum away any dust and debris where air sealing materials will be installed to allow for maximum adhesion.
3. Seal all top plates
3. Seal all top plates
Seal with caulk or one part foam to ensure proper adhesion.
4. Seal electrical penetrations
4. Seal electrical penetrations
Seal with caulk or one part foam to ensure proper adhesion.
5. Seal plumbing vent stacks
5. Seal plumbing vent stacks
Seal with caulk or one part foam to ensure proper adhesion.
6. Air seal chases, drop soffits
6. Air seal chases, drop soffits
Air seal with rigid material, bedded in sealant, fasten to ceiling joists and soffit framing with screws or nails.
Seal perimeter of rigid material thoroughly with one part foam or caulking.
7. Photo document work
7. Photo document work
Take photo of completed work before insulation is installed that will cover/conceal air sealing work. This is to make sure insulation is not disturbed in the QCI or monitoring processes.
8. Rake insulation back
8. Rake insulation back
Rake the insulation back into the areas it was removed from, leveling it as much as possible to ensure a consistent R-value across the entire attic.
9. Worst Case Draft test
9. Worst Case Draft test
Conduct a Worst Case draft test to verify Category I, II and III are venting safely before leaving home for the day.
Testing shall be recorded using the Utah WAP Worst Case Draft Test form.
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