Spray Foam Insulation cost: Lewiston vs Portland (2026)
Budget-wise, spray foam insulation in Lewiston ($4,000) runs 2% less than in Portland ($4,100), a roughly $100 spread.
Lewiston ME
Lower costTypically around $4,000
Portland ME
Typically around $4,100
Lewiston vs Portland: full breakdown
| Factor | Lewiston | Portland |
|---|---|---|
| Typical 2026 cost | $4,000 | $4,100 |
| Estimated range | $1,600–$6,400 | $1,650–$6,550 |
| Labor index (vs US) | ×1.01 | ×1.03 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,200 | $2,250 |
| Materials/equipment | $1,800 | $1,850 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Is the gap worth worrying about?
That 2% 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: Lewiston vs Portland
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 | Lewiston | Portland |
|---|---|---|
| Open-cell | $1,600–$4,800 | $1,650–$4,900 |
| Closed-cell | $2,650–$7,450 | $2,700–$7,600 |
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: Lewiston vs Portland
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 | Lewiston | Portland |
|---|---|---|
| 500 sq ft | $950–$2,550 | $1,000–$2,600 |
| 1,000 sq ft | $1,600–$4,250 | $1,650–$4,350 |
| 1,500 sq ft | $2,350–$5,850 | $2,400–$6,000 |
| 2,000+ sq ft | $3,000–$6,950 | $3,050–$7,100 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
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?
R-value, air-sealing and material decide both the price and the payback. Our editors on the trade-offs.
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
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 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.
Don't half-do an insulation job to save money upfront: seal the air leaks first, insulate to the DOE target for your zone, and stack the rebates. The full scope pays back faster than the partial one.
Lewiston vs Portland
Is spray foam insulation cheaper in Lewiston or Portland?
Yes — Portland costs more. Expect around $4,100 for spray foam insulation there against $4,000 in Lewiston, about $100 (2%) apart in 2026.
Why does spray foam insulation cost more in Portland than Lewiston?
Labor rates explain most of it — 1.03 in Portland vs 1.01 in Lewiston. A cold climate versus cold accounts for the rest.
How much is spray foam insulation in Lewiston, ME?
Expect to pay $1,600 to $6,400 for spray foam insulation in Lewiston in 2026, averaging around $4,000.
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 Lewiston and Portland (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?
Rarely. The $100 difference is real but one-time, and you can often close most of it in Portland by buying in the off-season and getting tighter, apples-to-apples bids. Ongoing factors — energy prices, climate and home condition — matter more over the life of the system.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik