Spray Foam Insulation cost: Apex vs Durham (2026)
Apex runs 1% higher than Durham for spray foam insulation — expect around $3,750 in Apex against $3,700 in Durham, a difference of about $50.
Apex NC
Typically around $3,750
Durham NC
Lower costTypically around $3,700
Apex vs Durham: full breakdown
| Factor | Apex | Durham |
|---|---|---|
| Typical 2026 cost | $3,750 | $3,700 |
| Estimated range | $1,500–$5,950 | $1,500–$5,900 |
| Labor index (vs US) | ×0.99 | ×0.98 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | None | None |
| Labor share | $2,050 | $2,050 |
| Materials/equipment | $1,700 | $1,650 |
These are 2026 planning figures for spray foam insulation, localized to each city — not formal quotes.
How much should this gap actually matter?
That 1% 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: Apex vs Durham
Every spray foam insulation type gets its own localized price for each metro, using the same labor, climate and permit adjustments — a true apples-to-apples comparison.
| Type | Apex | Durham |
|---|---|---|
| Open-cell | $1,500–$4,450 | $1,500–$4,450 |
| Closed-cell | $2,450–$6,900 | $2,450–$6,900 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
Spray foam insulation by area: Apex vs Durham
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 | Apex | Durham |
|---|---|---|
| 500 sq ft | $900–$2,350 | $900–$2,350 |
| 1,000 sq ft | $1,500–$3,950 | $1,500–$3,950 |
| 1,500 sq ft | $2,200–$5,450 | $2,150–$5,400 |
| 2,000+ sq ft | $2,750–$6,450 | $2,750–$6,400 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
Cheapest time for spray foam insulation in either city
Everyone waits until fall to insulate, which is exactly why fall costs the most. Spring and summer are quieter for installers and often catch a fresh year's rebate budget before it runs dry.
How much insulation is worth paying for?
Three choices shape an insulation budget — target R-value, whether air-sealing is included, and material type. Our editors weigh how each affects payback.
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.
The air-sealing case
Skip air-sealing and you're insulating around the very holes letting conditioned air leak out. Caulk, foam and weatherstripping are inexpensive and often return more felt comfort than a thicker blanket of insulation ever would — insist the crew handles the leaks before they bury them.
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.
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.
Apex vs Durham
Is spray foam insulation cheaper in Apex or Durham?
In 2026, spray foam insulation is cheaper in Durham at about $3,700, versus $3,750 in Apex — a difference of about $50 (1%).
Why does spray foam insulation cost more in Apex than Durham?
Labor rates explain most of it — 0.99 in Apex vs 0.98 in Durham. A mixed climate versus mixed accounts for the rest.
How much is spray foam insulation in Apex, NC?
Apex homeowners can expect $1,500 to $5,950 for spray foam insulation in 2026, with $3,750 the typical number.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
Timing doesn't change by city here — Spring and summer is the cheapest window in both Apex and Durham, saving roughly 5–10%. Avoid the pre-winter fall rush in either location, when emergency replacements push prices up.
Should I choose where to live based on spray foam insulation cost?
Not really — the $50 gap is one-time, and smart timing and tighter quotes in Apex can shrink it. Factors that compound over time, like energy prices and home condition, deserve more weight than a single upfront difference.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik