Stop the air leaks costing you 15–30% on heating and cooling. The highest-ROI home energy improvement, typically 100% covered by state rebate programs.
Insulation slows heat transfer through building assemblies. Air sealing stops uncontrolled air from moving through gaps, cracks, and penetrations. Without air sealing, your insulation underperforms — sometimes by 50%.
Air sealing is the cheapest, highest-ROI energy improvement you can make. It's also the measure state rebate programs cover most generously:
Caulk, one-part spray foam, rigid foam backing, and gasket materials. Site-specific — we use the right product for each leak location, not a one-size-fits-all approach.
For comprehensive projects, we can verify with a blower-door test before and after — a standard BPI protocol that quantifies leakage in CFM50 (cubic feet per minute at 50 pascals of pressure). Typical targets: a 20–40% reduction in air changes per hour is achievable on most retrofit jobs.
Typically 15–30% on heating and cooling bills. In an older leaky home with $3,000/year in energy costs, that's $450–$900/year in savings for a project that's often fully rebated.
For most rebate programs, yes — it's how leakage reduction gets quantified. We include it in our Mass Save® and NHSaves® scope.
You should air-seal first, or at minimum in the same visit before insulation is installed. Insulation alone won't solve leakage — you'll still feel drafts.
Usually still yes, though the payback is longer. Newer homes leak less than 1950s homes, but top plates, wire penetrations, and recessed lights are still leakage sources.
Aggressive air sealing can affect combustion appliance draft. We check CAZ (combustion appliance zone) safety as part of any comprehensive air-sealing job — a standard BPI protocol.
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