Spray Foam Insulation cost: Mount Pleasant vs North Charleston (2026)
Mount Pleasant and North Charleston are a near-perfect match on spray foam insulation cost in 2026, both landing around $3,800.
Mount Pleasant SC
Typically around $3,800
North Charleston SC
Typically around $3,800
Mount Pleasant vs North Charleston: full breakdown
| Factor | Mount Pleasant | North Charleston |
|---|---|---|
| Typical 2026 cost | $3,800 | $3,800 |
| Estimated range | $1,500–$6,100 | $1,500–$6,100 |
| Labor index (vs US) | ×0.99 | ×0.99 |
| Climate zone | Hot | Hot |
| Climate factor | ×1.02 | ×1.02 |
| Local permit | None | None |
| Labor share | $2,100 | $2,100 |
| Materials/equipment | $1,700 | $1,700 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
Basically a tie — focus on the contractor
This is a statistical tie on spray foam insulation cost, so let contractor reputation and project timing decide, not geography.
Spray foam insulation by type: Mount Pleasant vs North Charleston
Each spray foam insulation option, priced separately for both metros — the same local labor, climate and permit adjustments applied per city, so you can compare like for like.
| Type | Mount Pleasant | North Charleston |
|---|---|---|
| Open-cell | $1,500–$4,550 | $1,500–$4,550 |
| Closed-cell | $2,550–$7,100 | $2,550–$7,100 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
Spray foam insulation by area: Mount Pleasant vs North Charleston
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 | North Charleston |
|---|---|---|
| 500 sq ft | $900–$2,450 | $900–$2,450 |
| 1,000 sq ft | $1,500–$4,050 | $1,500–$4,050 |
| 1,500 sq ft | $2,250–$5,600 | $2,250–$5,600 |
| 2,000+ sq ft | $2,850–$6,600 | $2,850–$6,600 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
Cheapest time for spray foam insulation in either city
Demand for insulation spikes every fall as winter approaches, pushing prices with it. Spring and summer avoid that crowd, and utility rebate pools are frequently still fresh that early in the year.
How much insulation is worth paying for?
Insulation is priced on more than thickness. Target R-value, the presence or absence of air-sealing, and the material itself each pull the number in a different direction, and each changes how fast the job pays for itself.
The R-value case
Aim for the R-value the DOE assigns your zone, not a round number that sounds close enough. Every point you fall short is comfort you don't feel and utility savings you never bank — savings that would have covered the extra material several times over.
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 has some of the best rebate math in home improvement — utility and state programs can cover a solid share (the federal 25C credits ended Dec 2025). Check DSIRE before you book and time it to a fresh rebate budget.
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 North Charleston
Is spray foam insulation cheaper in Mount Pleasant or North Charleston?
Not really — both cities land at almost the same number for spray foam insulation, around $3,800 each.
Why does spray foam insulation cost more in North Charleston than Mount Pleasant?
The main driver is local labor rates: North Charleston's labor index is 0.99 versus 0.99 in Mount Pleasant. Climate zone (hot vs hot) also shift the total.
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?
The best window is the same in both Mount Pleasant and North Charleston: Spring and summer, when demand drops and installers discount to keep crews busy — typically 5–10% off peak pricing. The most expensive time anywhere is an emergency replacement during the pre-winter fall rush.
Should I choose where to live based on spray foam insulation cost?
Cost shouldn't be the deciding factor between Mount Pleasant and North Charleston — they land at nearly the same price. Contractor reputation, scope, equipment tier and timing matter more.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik