All are required, as applicable to design:
- All gaps in exterior sheathing ≥1/4", including rim and band areas
- Cantilevered floors blocked at exterior wall
- All chases blocked and sealed: Fireplace, tubs, under stairs
- All plumbing and electrical penetrations
- Sill and sole plates sealed to subfloor and foundation
- All penetrations through subfloor/slab, framing and drywall
- Rough openings around exterior doors and windows
- HVAC Boots and mechanical ventilation fan penetrations through drywall and subfloor
Air sealing is the process of reducing air infiltration and exfiltration of a home. Air leaks are a major cause of discomfort, moisture problems, energy losses and poor indoor air quality.
Gaps and holes should be sealed using the appropriate sealing material, e.g., caulk (fire-rated, silicon, etc.), spray foam, foam inserts. If gaps/holes are too large to seal with caulk or spray foam alone, a rigid backing material (e.g., wood, drywall) should be used to cover the hole, with the edges of the backing material sealed with an appropriate air sealing material.
When sealing window/door rough openings with spray foam, low-expanding spray foam approved for use around windows and doors is preferred.
The EarthCraft Technical Advisor will visually confirm compliance of criteria during the mid-construction and final inspections.
Refer to the 2020 Georgia Residential Energy Code Field Guide for details on air sealing: