Spray Foam Insulation cost: Duluth vs Plymouth (2026)
In 2026, spray foam insulation is about 17% less expensive in Duluth than in Plymouth. Most homeowners pay around $3,750 in Duluth versus $4,400 in Plymouth — a gap of roughly $650.
Duluth MN
Lower costTypically around $3,750
Plymouth MN
Typically around $4,400
Duluth vs Plymouth: full breakdown
| Factor | Duluth | Plymouth |
|---|---|---|
| Typical 2026 cost | $3,750 | $4,400 |
| Estimated range | $1,500–$6,000 | $1,750–$7,000 |
| Labor index (vs US) | ×0.94 | ×1.1 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,050 | $2,400 |
| Materials/equipment | $1,700 | $2,000 |
These are 2026 planning figures for spray foam insulation, localized to each city — not formal quotes.
Is the price difference a dealbreaker?
That's a real $650 difference (17%) on spray foam insulation — worth factoring in, though off-season timing and a tighter quote in Plymouth can narrow it.
Spray foam insulation by type: Duluth vs Plymouth
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 | Duluth | Plymouth |
|---|---|---|
| Open-cell | $1,500–$4,500 | $1,750–$5,250 |
| Closed-cell | $2,500–$6,950 | $2,900–$8,150 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
Spray foam insulation by area: Duluth vs Plymouth
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 | Duluth | Plymouth |
|---|---|---|
| 500 sq ft | $900–$2,400 | $1,050–$2,800 |
| 1,000 sq ft | $1,500–$4,000 | $1,750–$4,650 |
| 1,500 sq ft | $2,200–$5,500 | $2,550–$6,400 |
| 2,000+ sq ft | $2,800–$6,450 | $3,250–$7,550 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
What insulation pros earn in each metro
Roughly 55% of what you pay for spray foam insulation is labor, which is why local wages explain most of the price gap. The numbers below are actual metro wages for skilled installers, sourced from BLS OEWS — not guesses.
No BLS metro wage series for Duluth; we use Minnesota regional price parity instead.
Minneapolis-St. Paul-Bloomington metro · about 18% above the US average installer wage.
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
Fall is when everyone rushes to insulate before winter hits, making it the busiest and priciest season. Spring and summer see far less demand — and utility rebate budgets are often still full that early in the year.
How much insulation is worth paying for?
Insulation is priced on more than thickness. Target R-value, the presence or absence of air-sealing, and the material itself each pull the number in a different direction, and each changes how fast the job pays for itself.
The rebate case
Few home projects come with rebate support like insulation does — utility and state programs routinely offset a meaningful slice of the bill (the federal 25C credit closed in December 2025). Run your address through DSIRE first, and book when a program's yearly budget has just refilled.
The air-sealing case
Blown-in or batt, insulation can only slow the heat that isn't already escaping through gaps and penetrations. Sealing those leaks costs little and frequently buys more comfort per dollar than piling on extra R-value, so confirm it's written into the scope.
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.
Rare among home projects, insulation punishes the half-measure — the money saved by under-insulating or skipping the air-seal comes back as higher bills. Meet the DOE R-value for your zone, seal the leaks first, and use the rebates on the table.
Duluth vs Plymouth
Is spray foam insulation cheaper in Duluth or Plymouth?
In 2026, spray foam insulation is cheaper in Duluth at about $3,750, versus $4,400 in Plymouth — a difference of about $650 (17%).
Why does spray foam insulation cost more in Plymouth than Duluth?
Labor rates explain most of it — 1.1 in Plymouth vs 0.94 in Duluth. A cold climate versus cold accounts for the rest.
How much is spray foam insulation in Duluth, MN?
spray foam insulation in Duluth runs $1,500–$6,000 as of 2026 — most jobs land near $3,750.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
No, the seasonal pattern is the same in Duluth and Plymouth: 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?
Probably not. Yes, $650 is a real gap, but it's a one-time cost you can partly offset in Plymouth with off-season timing and tighter bids. Long-term factors like energy prices and home condition matter more than this one number.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik