How much does spray foam insulation cost?
Spray foam insulation runs $1,500 for a small targeted job (rim joists or basement), $4,500 for a typical attic or crawlspace install, and $12,000+ for whole-house closed-cell spray foam projects.
Quick price points (2026)
| Tier | Cost | Unit |
|---|---|---|
| Low | $1,500 | whole project |
| Typical | $4,500 | whole project |
| High | $12,000 | whole project |