Spray Foam Insulation cost: Madison vs Oshkosh (2026)
Madison runs 3% higher than Oshkosh for spray foam insulation — expect around $3,900 in Madison against $3,800 in Oshkosh, a difference of about $100.
Madison WI
Typically around $3,900
Oshkosh WI
Lower costTypically around $3,800
Madison vs Oshkosh: full breakdown
| Factor | Madison | Oshkosh |
|---|---|---|
| Typical 2026 cost | $3,900 | $3,800 |
| Estimated range | $1,550–$6,200 | $1,500–$6,050 |
| Labor index (vs US) | ×0.98 | ×0.95 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,150 | $2,100 |
| Materials/equipment | $1,750 | $1,700 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
Is the price difference a dealbreaker?
At 3%, this gap is small enough that it's usually swallowed by normal quote-to-quote variation for spray foam insulation — focus on the contractor, not the city.
Spray foam insulation by type: Madison vs Oshkosh
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 | Madison | Oshkosh |
|---|---|---|
| Open-cell | $1,550–$4,650 | $1,500–$4,550 |
| Closed-cell | $2,600–$7,250 | $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: Madison vs Oshkosh
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 | Madison | Oshkosh |
|---|---|---|
| 500 sq ft | $950–$2,500 | $900–$2,400 |
| 1,000 sq ft | $1,550–$4,150 | $1,500–$4,050 |
| 1,500 sq ft | $2,300–$5,700 | $2,200–$5,550 |
| 2,000+ sq ft | $2,900–$6,750 | $2,800–$6,550 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
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 one of the few home upgrades where spending more can genuinely pay for itself. Our editors on the choices that decide both cost and payback.
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
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.
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.
Madison vs Oshkosh
Is spray foam insulation cheaper in Madison or Oshkosh?
Yes — Madison costs more. Expect around $3,900 for spray foam insulation there against $3,800 in Oshkosh, about $100 (3%) apart in 2026.
Why does spray foam insulation cost more in Madison than Oshkosh?
Labor rates explain most of it — 0.98 in Madison vs 0.95 in Oshkosh. A cold climate versus cold accounts for the rest.
How much is spray foam insulation in Madison, WI?
Madison homeowners can expect $1,550 to $6,200 for spray foam insulation in 2026, with $3,900 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 Madison and Oshkosh (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 Madison 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