Quick answer: Spray foam insulation in South Carolina costs $1.00–$1.60 per board foot for open-cell and $1.60–$2.60 per board foot for closed-cell. Full scopes are quoted per project after an on-site assessment. Most jobs finish in one day. Final pricing depends on crawl-space access, the foam thickness the assembly needs, and whether existing insulation has to be removed first — we give a firm number after we see the space.
Quick Answer
Most Greenville SC (Upstate SC) homeowners pay between $1,500 and $5,250 for spray foam insulation. A 1,500 sq ft attic costs approximately $2,250–$3,750 for open-cell or $3,000–$5,250 for closed-cell.
Open-Cell vs. Closed-Cell: At a Glance
| | Open-Cell | Closed-Cell |
|—|—|—|
| Cost per board foot | $1.00–$1.60 | $1.60–$2.60 |
| Best for | Attics, interior walls | Crawl spaces, basement walls, exterior |
| R-value per inch | R-3.7 | R-6.5 |
| Vapor barrier | No | Yes |
| SC climate fit | Good | Better for moisture-prone areas |
Job Size Cost Calculator
All costs calculated from market ranges. Low = minimum rate × sq ft. High = maximum rate × sq ft.
| Area | Sq Footage | Open-Cell Cost | Closed-Cell Cost |
|—|—|—|—|
| Attic only | 1,000 sq ft | $1,000–$1,600 | $1,600–$2,600 |
| Attic only | 1,500 sq ft | $1,500–$2,400 | $2,400–$3,900 |
| Attic only | 2,000 sq ft | $2,000–$3,200 | $3,200–$5,200 |
| Crawl space | 800 sq ft | $800–$1,280 | $1,280–$2,080 |
| Crawl space | 1,200 sq ft | $1,200–$1,920 | $1,920–$3,120 |
| Whole home | 1,500 sq ft | $1,500–$2,400 | $2,400–$3,900 |
| Whole home | 2,500 sq ft | $2,500–$4,000 | $4,000–$6,500 |
What Affects Your Price
- Access difficulty — tight crawl spaces and low attics take longer to work in and add labor cost
- Existing insulation removal — adds $0.25–$0.50 per sq ft; older Upstate homes in Augusta Road, North Main, and Simpsonville neighborhoods commonly need this
- Open-cell vs. closed-cell choice — closed-cell runs 30–50% more per sq ft but delivers higher R-value in less depth
- Market labor rates in Greenville SC (Upstate SC) — Upstate labor is lower than coastal SC, but fuel and material costs affect every job
- Job size — larger jobs typically land at the lower end of the per-sq-ft range
Savings Math
Duke Energy and Laurens Electric average rate: $0.115/kWh
| Baseline | Number |
|—|—|
| Average monthly utility bill (Greenville SC home) | $170/month |
| Estimated HVAC share | ~45% = ~$77/month |
| Energy reduction after spray foam | 20% |
| Monthly savings | ~$34/month |
| Annual savings | ~$408/year |
| Payback on a $4,000 job | ~9.8 years |
At Duke Energy / Laurens Electric’s average rate of $0.115/kWh, a Greenville SC (Upstate SC) home reducing energy use by 20% on a $170/month bill saves $34/month = $408/year. A $4,000 job pays for itself in approximately 9–10 years.
Get a Free Estimate
Serving Greenville, Taylors, Simpsonville, Greer, Mauldin, and Fountain Inn — contact us for a free on-site estimate from an insured Upstate SC crew.
