The cheapest, best time to spray foam a building is before the drywall goes on. In new construction the wall and roof cavities are open, the installer has clear access, and the air barrier gets built into the envelope from the start rather than chased later. It is the ideal case for foam.
Why builders spec foam at framing
- Clear access = fast, thorough application and the lowest cost per board foot.
- Air-tightness by design: the envelope is sealed as it is built, which supports blower-door targets and modern energy code.
- The right foam by assembly: closed-cell below grade, at rim joists and on exterior/roof; open-cell where interior sound and budget lead.
Homes and commercial alike
From custom homes chasing a high-performance envelope to commercial and multi-family builds meeting code, specifying foam at framing bakes performance in. Coordinate it early with the build schedule.
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