Spray Foam Insulation cost: Florence vs North Charleston (2026)
In 2026, spray foam insulation is about 6% less expensive in Florence than in North Charleston. Most homeowners pay around $3,600 in Florence versus $3,800 in North Charleston — a gap of roughly $200.
Florence SC
Lower costTypically around $3,600
North Charleston SC
Typically around $3,800
Florence vs North Charleston: full breakdown
| Factor | Florence | North Charleston |
|---|---|---|
| Typical 2026 cost | $3,600 | $3,800 |
| Estimated range | $1,450–$5,700 | $1,500–$6,100 |
| Labor index (vs US) | ×0.93 | ×0.99 |
| Climate zone | Hot | Hot |
| Climate factor | ×1.02 | ×1.02 |
| Local permit | None | None |
| Labor share | $2,000 | $2,100 |
| Materials/equipment | $1,600 | $1,700 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
Is the price difference a dealbreaker?
That 6% gap is small — for spray foam insulation it's usually less than the spread between two local contractors' quotes, so the metro matters far less than who you hire and when you buy.
Spray foam insulation by type: Florence vs North Charleston
We localize each spray foam insulation type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Florence | North Charleston |
|---|---|---|
| Open-cell | $1,450–$4,300 | $1,500–$4,550 |
| Closed-cell | $2,400–$6,650 | $2,550–$7,100 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Spray foam insulation by area: Florence 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 | Florence | North Charleston |
|---|---|---|
| 500 sq ft | $850–$2,300 | $900–$2,450 |
| 1,000 sq ft | $1,450–$3,800 | $1,500–$4,050 |
| 1,500 sq ft | $2,100–$5,250 | $2,250–$5,600 |
| 2,000+ sq ft | $2,650–$6,200 | $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
Because most homeowners wait for the fall pre-winter panic, that's when prices peak. Getting it done in spring or summer means less competition and, often, an untapped rebate budget.
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 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.
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.
What makes insulation unusual is that the thorough version and the cheap version are the same version — seal first, meet the DOE R-value for your zone, and layer on the rebates. A partial job just pushes the payback date further out.
Florence vs North Charleston
Is spray foam insulation cheaper in Florence or North Charleston?
Yes — North Charleston costs more. Expect around $3,800 for spray foam insulation there against $3,600 in Florence, about $200 (6%) apart in 2026.
Why does spray foam insulation cost more in North Charleston than Florence?
North Charleston's higher labor index (0.99 vs 0.93 in Florence) is the biggest factor, with the hot/hot climate split playing a smaller role.
How much is spray foam insulation in Florence, SC?
Expect to pay $1,450 to $5,700 for spray foam insulation in Florence in 2026, averaging around $3,600.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
No, the seasonal pattern is the same in Florence and North Charleston: book during Spring and summer for about 5–10% in savings. The pre-winter fall rush is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on spray foam insulation cost?
That would be a stretch. $200 is a one-time difference, not an ongoing one, and off-season buying plus apples-to-apples bids in North Charleston 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