Spray Foam Insulation Cost by Scope Guide
The job priced by scope: attic rows, wall rows, crawl-space rows, and rim-joist rows apart.
Orange County, CA · Updated 2026 · Costs shown as ranges — your quote will vary by installer and scope
The scope readings, priced apart by frame
| Scope | Frame A reading | Frame B reading |
|---|---|---|
| Attic scope | in installed by-area rows | $3,000-$8,000 by-area row |
| Crawl-space scope | in installed by-area rows | $2,000-$4,000 by-area row |
| Rim-joist scope | in installed by-area rows | $2,000-$2,500 by-area row |
| Wall scope, all exterior walls | in installed by-area rows | $4,000-$10,000 by-area row |
Each reading is one frame counting of one scope in one job, never blended across scopes. Frame A counts scopes inside one installed by-area band; Frame B prints a separate by-area row for each scope.
The attic and wall rows, priced apart
| Scope row | Frame | 2026 reading |
|---|---|---|
| Attic row, by area | Frame B | $3,000-$8,000 |
| Basement row, by area | Frame B | $2,500-$9,000 |
| All exterior walls row, by area | Frame B | $4,000-$10,000 |
| Installed band behind every scope row | Frame A | $1-$5 per square foot |
The attic scope here is the foam job in an attic, priced as a foam job alone -- never the attic insulation ticket, which prices batt, blown-in, and board rows on its own hub. The wall scope prices foam in exterior walls as its own row, apart from the attic and basement rows beside it.
The crawl-space and rim-joist rows, priced apart
| Scope row, as published | Frame | 2026 reading |
|---|---|---|
| Crawl space row, by area | Frame B | $2,000-$4,000 |
| Rim joists row, by area | Frame B | $2,000-$2,500 |
| Whole house row, by area | Frame B | $8,000-$20,000 |
| Small-project minimum row | Frame B | $1,000-$2,000+ |
The crawl-space scope here is the foam job under a house, priced as a foam job alone -- never the crawl-space insulation ticket on its own guide, whose spray foam row stands inside that ticket and is never repriced here. The rim-joist scope stands as the smallest by-area row in Frame B, apart from the crawl-space row beside it. The frames count the same closed-cell job differently -- an Angi materials-only per-foot row at $1.30-$3.10 against a HomeGuide installed per-foot row at $3.00-$5.00. That difference is named as a frame difference on every page here, never averaged.
The neighbours named apart
Type readings price apart on the companion guide. Named apart, never a row here: the attic insulation ticket, the crawl-space insulation ticket, blown-in and batt materials, insulation removal, radiant barriers, and whole-house insulation packages, each in its own lane.
Reading a by-scope quote, by frame
- Scope named beside every figure
- Scope row read apart from any whole-house package row
Frequently asked questions
What does spray foam insulation cost by scope, as reported?
Frame B prints its by-area rows apart: attic at $3,000 to $8,000, crawl space at $2,000 to $4,000, rim joists at $2,000 to $2,500, and all exterior walls at $4,000 to $10,000. Frame A prints one installed band at $1 to $5 per square foot by area behind every scope.
What does the attic scope print at, as reported?
Frame B prints the attic by-area row at $3,000 to $8,000. Frame A prints its installed band at $1 to $5 per square foot, with a pro-completed job at $1,500-$6,200 per 1,000 square feet standing behind the scope rows.
What does the crawl-space scope print at, as reported?
Frame B prints the crawl space by-area row at $2,000 to $4,000 and the rim joists row at $2,000 to $2,500. That foam row is the foam job alone, apart from the crawl-space insulation ticket on its own guide.
What does the wall scope print at, as reported?
Frame B prints all exterior walls at $4,000 to $10,000 and its whole house row at $8,000 to $20,000. Frame A prints 3,000 square feet installed at $3,000 to $15,000 inside its by-area band.
Can the scope rows be added into one whole-house total?
No. Rows stand as printed -- an attic row at $3,000 to $8,000 in Frame B, a crawl-space row at $2,000 to $4,000 in Frame B, an installed band at $1 to $5 per square foot in Frame A. The attic ticket, the crawl-space ticket, blown-in and batt materials, removal, and radiant barriers sit in their own lanes, named apart.