Use published national ranges to plan a budget, then request a free on-site estimate for a figure that matches your attic, crawl space or metal building. These numbers are not a bid for your address.
| Scope | Typical published range | Source |
|---|---|---|
| Open-cell spray foam (installed) | $0.60–$1.60 per board foot | HomeAdvisor spray foam cost guide; Angi spray foam cost |
| Closed-cell spray foam (installed) | $1.30–$3.10 per board foot | HomeAdvisor; Angi |
| Attic spray foam (typical project totals) | $1,100–$9,000 | HomeAdvisor; Angi |
| Crawl space spray foam (typical project totals) | $1,200–$6,900 | HomeAdvisor; Angi |
| National typical project range | $1,455–$4,336 (avg. about $2,888) | Angi 2026 cost data |
Foam type (open-cell vs closed-cell), thickness in board feet, access, prep work, and whether the spray is on an attic floor, roof deck, crawl-space wall or metal panel all change the total. Southwest Missouri humidity and crawl-space moisture can add prep before foam goes on.
For permits in city limits, see the City of Webb City building permits and inspections office. For safety questions before install, see the EPA guide on using spray polyurethane foam more safely.
Call 417-217-7326 or request a free estimate.