Across the bridge in Douglas County
Spray Foam Insulation in Superior, WI
Boom-era houses on flat ground beside the harbor, with Wisconsin's own rebate program.
- Free on-site estimates
- Written quote showing material, thickness and R-value for each area
- Attics, rim joists and basements checked for moisture before anything is covered
Insulating Superior's Older Homes
Spray foam insulation in Superior covers a housing stock with deep roots. The city was platted in 1854, incorporated in 1889, and saw heavy building during the 1888-1892 boom before the Panic of 1893 slowed things down. The 2020 census counted 12,593 housing units and 6.1 percent vacancy. Many of the houses on those long grid streets are older wood-frame homes with basements, simple attics and walls that were never insulated.
Flat ground, open wind
Unlike Duluth's hillside, Superior is flat and open to the bay and the lake. The city's 1991-2020 normals list a January daily mean of 14.1F, an all-time record low of -38F and about 56 inches of snow a year. Less snow than across the bridge, but wind finds every gap around windows, sills and the rim joist.
Wisconsin rebates
Superior homeowners are in Wisconsin, so Minnesota programs do not apply. Focus on Energy, the statewide program run with Wisconsin utilities, has published rebates for attic, wall, foundation and sill insulation and for air sealing done with insulation. Its 2026 overview requires a participating Trade Ally contractor and sets program deadlines, so check the current terms before you plan the job around a rebate.
A practical order of work
In most Superior houses we start in the basement with closed-cell foam on the rim joist and sill, then air seal and insulate the attic. If rooms on the windward side stay cold, dense-packed walls are the next step.
Port-city houses
Homes near the industrial waterfront, rail yards and refinery often take more wind and dust. Air sealing helps keep that outside as well as keeping heat in. Get a free estimate
What to Know in Superior
- Founding and boom. Superior was founded in 1854 and incorporated as a city on March 25, 1889; heavy building came during the 1888-1892 boom.
- Housing units. The 2020 census counted 12,593 housing units in Superior, with 6.1% vacant.
- Climate. Superior's 1991-2020 normals list a January daily mean of 14.1F, an all-time record low of -38F and about 56.0 inches of snow per year.
- Wisconsin rebates. Focus on Energy's 2026 insulation and air sealing overview lists rebates for attic, wall, foundation and sill insulation, with air sealing rebates tied to attic or wall insulation by a Trade Ally contractor.
Superior Questions
Do Minnesota rebates apply in Superior?
No. Superior is in Wisconsin, where Focus on Energy runs the statewide program. Check its current year's rules, contractor requirements and deadlines.
What should I insulate first in an older Superior house?
Usually the rim joist and the attic. Both leak a lot of air for their size and are relatively affordable to fix.
Do you work on both sides of the bridge?
Yes. We work in Superior and across Douglas County's nearby neighborhoods as well as Duluth.
Can you insulate walls without opening them?
Yes, with dense-pack cellulose blown in through small holes that are then patched.
Free Estimates in Superior, WI
Superior homes get the same free on-site estimate and written quote.
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