Spray Foam Insulation cost: Billings vs Great Falls (2026)
In 2026, Billings and Great Falls land on nearly identical spray foam insulation pricing — about $3,800 either way.
Billings MT
Typically around $3,800
Great Falls MT
Typically around $3,800
Billings vs Great Falls: full breakdown
| Factor | Billings | Great Falls |
|---|---|---|
| Typical 2026 cost | $3,800 | $3,800 |
| Estimated range | $1,500–$6,100 | $1,500–$6,050 |
| Labor index (vs US) | ×0.96 | ×0.95 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,100 | $2,100 |
| Materials/equipment | $1,700 | $1,700 |
These are 2026 planning figures for spray foam insulation, localized to each city — not formal quotes.
Basically a tie — focus on the contractor
Neither metro has a cost edge on spray foam insulation — spend your decision-making energy on the contractor, not the location.
Spray foam insulation by type: Billings vs Great Falls
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 | Billings | Great Falls |
|---|---|---|
| Open-cell | $1,500–$4,550 | $1,500–$4,550 |
| Closed-cell | $2,550–$7,100 | $2,500–$7,050 |
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: Billings vs Great Falls
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 | Billings | Great Falls |
|---|---|---|
| 500 sq ft | $900–$2,450 | $900–$2,400 |
| 1,000 sq ft | $1,500–$4,050 | $1,500–$4,050 |
| 1,500 sq ft | $2,250–$5,550 | $2,200–$5,550 |
| 2,000+ sq ft | $2,850–$6,600 | $2,800–$6,550 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
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?
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 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.
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.
Billings vs Great Falls
Is spray foam insulation cheaper in Billings or Great Falls?
There's no meaningful difference: spray foam insulation runs about $3,800 in both places.
Why does spray foam insulation cost more in Great Falls than Billings?
It comes down to labor: Great Falls indexes at 0.95 against Billings's 0.96. The cold-vs-cold climate difference adds to the gap.
How much is spray foam insulation in Billings, MT?
spray foam insulation in Billings runs $1,500–$6,100 as of 2026 — most jobs land near $3,800.
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 Billings and Great Falls, 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 on this basis — Billings and Great Falls cost about the same. Weigh contractor quality, scope, equipment tier and timing instead.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik