Spray Foam Insulation cost: Duluth vs Mankato (2026)
In 2026, Duluth and Mankato land on nearly identical spray foam insulation pricing — about $3,750 either way.
Duluth MN
Typically around $3,750
Mankato MN
Typically around $3,750
Duluth vs Mankato: full breakdown
| Factor | Duluth | Mankato |
|---|---|---|
| Typical 2026 cost | $3,750 | $3,750 |
| Estimated range | $1,500–$6,000 | $1,500–$6,000 |
| Labor index (vs US) | ×0.94 | ×0.94 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,050 | $2,050 |
| Materials/equipment | $1,700 | $1,700 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
No real cost edge either way
The two metros are effectively a wash for spray foam insulation — pick on contractor quality and timing, not location.
Spray foam insulation by type: Duluth vs Mankato
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 | Duluth | Mankato |
|---|---|---|
| Open-cell | $1,500–$4,500 | $1,500–$4,500 |
| Closed-cell | $2,500–$6,950 | $2,500–$6,950 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
Spray foam insulation by area: Duluth vs Mankato
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 | Mankato |
|---|---|---|
| 500 sq ft | $900–$2,400 | $900–$2,400 |
| 1,000 sq ft | $1,500–$4,000 | $1,500–$4,000 |
| 1,500 sq ft | $2,200–$5,500 | $2,200–$5,500 |
| 2,000+ sq ft | $2,800–$6,450 | $2,800–$6,450 |
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
Everyone insulates in fall before winter, so that's the busy, full-price season. Booking in spring or summer catches off-peak pricing — and utility rebate budgets are often freshest early in the year.
How much insulation is worth paying for?
How much you spend on insulation and how fast it pays back come down to R-value, air-sealing and material. Our editors break down the trade-offs.
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.
The rebate case
Insulation carries some of the strongest incentive money in remodeling, with utility and state rebates covering a real portion of the cost since the federal 25C credit expired at the end of 2025. Look up what applies on DSIRE, then schedule the work while rebate funds are still unclaimed for the year.
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.
Duluth vs Mankato
Is spray foam insulation cheaper in Duluth or Mankato?
Practically identical — expect around $3,750 for spray foam insulation whichever city you're in.
Why does spray foam insulation cost more in Mankato than Duluth?
It comes down to labor: Mankato indexes at 0.94 against Duluth's 0.94. The cold-vs-cold climate difference adds to the gap.
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 Mankato: 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?
There's no cost argument here between Duluth and Mankato — they're a wash. Focus on contractor reputation, project scope, equipment tier and timing.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik