Air sealing is one of the most cost effective ways to improve a home’s energy performance and HERS score. Small, targeted efforts often deliver outsized results.
Seal the Big Holes First
Focus on large, hidden gaps before chasing small cracks. Attic bypasses, open chases, dropped soffits, and rim joists move the most air and should be addressed first.
Create a Continuous Air Barrier
Think of the air barrier as an unbroken layer wrapping the conditioned space. Wherever it is interrupted by framing, penetrations, or transitions, those points need to be sealed to maintain continuity.
Do Not Forget the Ceiling Plane
The attic floor is a major leakage zone. Sealing top plates, light fixtures, and access hatches before insulation keeps warm air from escaping upward in winter.
Verify With Testing
A blower door test confirms whether your sealing efforts worked and reveals what remains. We can test mid project and advise on the highest impact next steps. Reach out to improve your score.