Spray foam insulation quotes in South Carolina
We match homeowners in 5 South Carolina areas with up to three vetted local spray foam installers. Pick your area for local climate zone, R-value and rebate details, or request quotes now.
- Climate zones in our South Carolina areas: 3A (2021 IECC)
- State code: 2009 IECC
- Utility rebates we verified: 1 active program(s)
Our South Carolina service areas
| Area | County | 2021 IECC zone | ENERGY STAR attic target |
|---|---|---|---|
| Anderson | Anderson County | 3A | R-49 |
| Fort Mill | York County | 3A | R-49 |
| Greenville | Greenville County | 3A | R-49 |
| Rock Hill | York County | 3A | R-49 |
| Spartanburg | Spartanburg County | 3A | R-49 |
Climate zones: PNNL-33270, Guide to Determining Climate Zone by County (IECC 2021). R-values: ENERGY STAR.
South Carolina energy code
2009 IECC, effective January 1, 2013. Future updates require new legislation.
Source: NAHB, "Residential Provisions of the IECC: State Adoption Status" (current as of May 2026).
Utility insulation programs in our South Carolina areas
Duke Energy Carolinas Smart $aver
Duke's Smart $aver program lists insulation and air-sealing rebates through participating contractors. We could not confirm the current Carolinas amounts on Duke's own pages, so ask the installer to show you the current offer.
Read on the program's own page October 16, 2026. Programs change; confirm before you sign.
South Carolina state Home Energy Rebates
Not yet launched South Carolina Home Energy Rebates
Electrification/appliance rebates (HEAR): "Rebates are not currently available but are expected to launch in 2026."
Whole-home efficiency rebates (HOMES/HER): "The programs are expected to launch statewide in 2026."
Max rebate (per official page): Qualifying households could receive up to $14,000 in rebates for eligible appliances and upgrades.
Official source: South Carolina Energy Office. Status text compiled via referencesource.org, last checked by them August 25, 2026. Full South Carolina rebate page →
Cost
National published ranges (we don't publish local prices without local data):
| Example job (typical thickness) | Estimated installed range |
|---|---|
| 1,000 sq ft attic roofline, open cell (6") | $3,600–$9,600 |
| 1,000 sq ft attic roofline, closed cell (3") | $3,900–$9,300 |
| 1,500 sq ft walls, open cell (3.5") | $3,150–$8,400 |
| 1,500 sq ft walls, closed cell (2") | $3,900–$9,300 |
| 200 sq ft rim joists, closed cell (2") | $520–$1,240 |
Where the cost numbers come from
- Per-board-foot installed prices: open cell $0.60–$1.60, closed cell $1.30–$3.10. Source: Angi, "How Much Does Spray Foam Insulation Cost? [2026 Data]" (updated Sep 9, 2026).
- Per-square-foot installed prices: open cell $1.50–$3.50, closed cell $3.00–$5.00; many companies have job minimums of $1,000–$2,000+. Source: HomeGuide, "How Much Does Spray Foam Insulation Cost? (2026)" (Dec 1, 2025).
- Typical thickness defaults: Profoam spray foam price sheet (prices valid Aug 1, 2026): "2" avg in walls / 3" avg in roof lines" (closed cell), "3.5" avg in walls / 6" avg in roof lines" (open cell).
These are national published ranges, not local prices. We don't publish local prices until we have real local quotes.