Spray Foam Insulation cost: Denver vs Longmont (2026)
Denver runs 7% higher than Longmont for spray foam insulation — expect around $4,300 in Denver against $4,000 in Longmont, a difference of about $300.
Denver CO
Typically around $4,300
Longmont CO
Lower costTypically around $4,000
Denver vs Longmont: full breakdown
| Factor | Denver | Longmont |
|---|---|---|
| Typical 2026 cost | $4,300 | $4,000 |
| Estimated range | $1,700–$6,850 | $1,600–$6,350 |
| Labor index (vs US) | ×1.08 | ×1 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,350 | $2,200 |
| Materials/equipment | $1,950 | $1,800 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
How much should this gap actually matter?
A 7% difference on spray foam insulation is minor — you'll typically see a wider spread just from getting multiple quotes in the same city, so don't let location drive the decision.
Spray foam insulation by type: Denver vs Longmont
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 | Denver | Longmont |
|---|---|---|
| Open-cell | $1,700–$5,150 | $1,600–$4,750 |
| Closed-cell | $2,850–$8,000 | $2,650–$7,400 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
Spray foam insulation by area: Denver vs Longmont
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 | Denver | Longmont |
|---|---|---|
| 500 sq ft | $1,050–$2,750 | $950–$2,550 |
| 1,000 sq ft | $1,700–$4,600 | $1,600–$4,250 |
| 1,500 sq ft | $2,500–$6,300 | $2,350–$5,850 |
| 2,000+ sq ft | $3,200–$7,450 | $2,950–$6,900 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
What insulation pros earn in each metro
Since labor accounts for around 55% of what a spray foam insulation job costs, it's the biggest lever behind any price gap between cities. What you're seeing below is actual BLS metro wage data for skilled installers — not a guess.
Denver-Aurora-Centennial metro · about 15% above the US average installer wage.
No BLS metro wage series for Longmont; we use Colorado regional price parity instead.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
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?
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.
Denver vs Longmont
Is spray foam insulation cheaper in Denver or Longmont?
Longmont wins on price: spray foam insulation runs about $4,000 there versus $4,300 in Denver, a gap of roughly $300 (7%) as of 2026.
Why does spray foam insulation cost more in Denver than Longmont?
The main driver is local labor rates: Denver's labor index is 1.08 versus 1 in Longmont. Climate zone (cold vs cold) also shift the total.
How much is spray foam insulation in Denver, CO?
Denver homeowners can expect $1,700 to $6,850 for spray foam insulation in 2026, with $4,300 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 Denver and Longmont (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?
Not really — the $300 gap is one-time, and smart timing and tighter quotes in Denver 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