Spray Foam Insulation cost: Mount Pleasant vs Rock Hill (2026)
The two metros aren't quite in sync on spray foam insulation: Mount Pleasant sits 4% above Rock Hill, or roughly $3,800 versus $3,650 — about $150 apart.
Mount Pleasant SC
Typically around $3,800
Rock Hill SC
Lower costTypically around $3,650
Mount Pleasant vs Rock Hill: full breakdown
| Factor | Mount Pleasant | Rock Hill |
|---|---|---|
| Typical 2026 cost | $3,800 | $3,650 |
| Estimated range | $1,500–$6,100 | $1,450–$5,800 |
| Labor index (vs US) | ×0.99 | ×0.95 |
| Climate zone | Hot | Hot |
| Climate factor | ×1.02 | ×1.02 |
| Local permit | None | None |
| Labor share | $2,100 | $2,000 |
| Materials/equipment | $1,700 | $1,650 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Is the price difference a dealbreaker?
4% is within noise for spray foam insulation — contractor selection and timing move the price more than which of these two metros you're in.
Spray foam insulation by type: Mount Pleasant vs Rock Hill
Below, each spray foam insulation option is priced independently for both cities, with identical local labor, climate and permit logic applied — so the comparison holds up.
| Type | Mount Pleasant | Rock Hill |
|---|---|---|
| Open-cell | $1,500–$4,550 | $1,450–$4,350 |
| Closed-cell | $2,550–$7,100 | $2,400–$6,800 |
These are 2026 planning figures for spray foam insulation, localized to each city — not formal quotes.
Spray foam insulation by area: Mount Pleasant vs Rock Hill
Spray foam is priced by board foot (1 sq ft at 1 inch thick), which works out to about $1.50–$5 per sq ft of surface installed depending on foam type and thickness. Closed-cell costs more but adds twice the R-value per inch.
| Size | Mount Pleasant | Rock Hill |
|---|---|---|
| 500 sq ft | $900–$2,450 | $850–$2,350 |
| 1,000 sq ft | $1,500–$4,050 | $1,450–$3,900 |
| 1,500 sq ft | $2,250–$5,600 | $2,150–$5,350 |
| 2,000+ sq ft | $2,850–$6,600 | $2,700–$6,300 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Cheapest time for spray foam insulation in either city
The fall insulation rush drives prices up because everyone's thinking about the coming winter at once. Book in spring or summer instead, when demand is lower and rebate funds haven't been claimed yet.
How much insulation is worth paying for?
Insulation is one of the few home upgrades where spending more can genuinely pay for itself. Our editors on the choices that decide both cost and payback.
The air-sealing case
Insulation without air-sealing underperforms. Sealing leaks first is cheap and often delivers more comfort per dollar than thicker insulation alone — make sure it's in the scope.
The rebate case
Insulation carries some of the strongest incentive money in remodeling, with utility and state rebates covering a real portion of the cost since the federal 25C credit expired at the end of 2025. Look up what applies on DSIRE, then schedule the work while rebate funds are still unclaimed for the year.
The R-value case
Insulate to the DOE recommendation for your climate zone — under-insulating to save money leaves comfort and energy savings on the table that would have paid the job back.
Air-seal before you insulate, hit the DOE-recommended R-value for your zone, and claim every rebate you're eligible for — insulation is a rare case where doing the full job is also the cheapest one, long-term.
Mount Pleasant vs Rock Hill
Is spray foam insulation cheaper in Mount Pleasant or Rock Hill?
Rock Hill wins on price: spray foam insulation runs about $3,650 there versus $3,800 in Mount Pleasant, a gap of roughly $150 (4%) as of 2026.
Why does spray foam insulation cost more in Mount Pleasant than Rock Hill?
Mount Pleasant's higher labor index (0.99 vs 0.95 in Rock Hill) is the biggest factor, with the hot/hot climate split playing a smaller role.
How much is spray foam insulation in Mount Pleasant, SC?
Mount Pleasant homeowners can expect $1,500 to $6,100 for spray foam insulation in 2026, with $3,800 the typical number.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
It doesn't vary by location — Spring and summer is the discount window in both Mount Pleasant and Rock Hill (roughly 5–10% off), while the pre-winter fall rush tends to be the most expensive in either city.
Should I choose where to live based on spray foam insulation cost?
That would be a stretch. $150 is a one-time difference, not an ongoing one, and off-season buying plus apples-to-apples bids in Mount Pleasant can close a good chunk of it. What matters more long-term is energy costs, climate and the condition of the home.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik