Cold winters on the bay
Spray Foam Insulation in Green Bay, WI
From pre-war homes near the river to newer east side subdivisions, we seal and insulate for a Zone 6 winter.
- Free on-site estimates
- Written quote showing foam type, depth and R-value
- Moisture, roof leaks and old insulation checked first
Insulating Homes Across the City
Spray foam insulation in Green Bay usually goes into three places: the rim joists in the basement, the attic, and any room that sits over a garage or porch. The city counted 45,789 housing units in 2020, and they cover more than a century of building, from houses near the paper mills and downtown to subdivisions on the far east and west sides. The approach changes with the age of the house, but the goal is the same: stop warm air leaking out and cold air leaking in.
Older neighborhoods
In houses built before the 1960s we often find attics with a few inches of old fill, open rim joists and walls with little or no insulation. Sealing the attic floor, foaming the rim and dense-packing walls where it makes sense brings a drafty house up a long way. We check wiring before filling any wall.
Mid-century and newer homes
Ranches and split-levels from the 1950s through the 1980s tend to have shallow attics with recessed lights and bath fans that leak. Newer homes have better attic depth but often leave the rim joist and bonus-room kneewalls weak.
Owners and landlords
Census QuickFacts shows about 58% of Green Bay homes are owner-occupied, so a good share of our calls come from landlords who want lower heating bills and fewer tenant complaints about cold rooms. We quote rentals the same way: area by area, in writing.
Costs for a city house
National guides put a rim joist foam job at about $2,000 to $2,500 and a typical attic insulation job at $1,000 to $2,700 (HomeGuide). City lots often have tight driveways and detached garages at the alley, which can affect hose runs and setup, so we note access on the quote. You get one written number per area.
What to Know in Green Bay
- Long freezing season. Normals from Austin Straubel for 1991 to 2020 show about 68 days a year at or below freezing and 19 nights below 0°F, with a January average of 16.6°F.
- Housing count. The 2020 census counted 107,395 people and 45,789 housing units on about 45.5 square miles of land.
- Owners and renters. Census QuickFacts for 2020 to 2024 lists a 57.9% owner-occupied rate and a $207,200 median home value.
- Code zone. Brown County is in Climate Zone 6A, where Wisconsin's code summary lists R-49 ceilings and R-20 or R-13+5 walls.

Green Bay Questions
Do you insulate rental properties in Green Bay?
Yes. Many rentals here have open rim joists and thin attic insulation. We price each area in writing so you can decide what to do now and what can wait.
What should I fix first in an older Green Bay house?
Usually the attic air sealing and the rim joist. Those two spots leak the most air for the least money to fix. Walls come next if they are empty.
How long does a typical job take?
A rim joist or attic job is often done in a day. Larger jobs or several areas can take longer, and spray foam needs time to cure before you go back in.
Can you work in a house with tenants living in it?
Yes. We schedule around tenants, close off and ventilate the work area, and tell everyone when the space is ready again.
Free Estimates in Green Bay, WI
Free on-site estimates anywhere in Green Bay.
Spray Foam Insulation Near Green Bay
- Spray Foam Insulation in De Pere, WI
- Spray Foam Insulation in Ashwaubenon, WI
- Spray Foam Insulation in Allouez, WI
- Spray Foam Insulation in Bellevue, WI
- Spray Foam Insulation in Howard, WI
- Spray Foam Insulation in Suamico, WI
- Spray Foam Insulation in Hobart, WI
- Spray Foam Insulation in Ledgeview, WI
- Spray Foam Insulation in Lawrence, WI
- Spray Foam Insulation in Scott, WI
- Spray Foam Insulation in Pulaski, WI
- Spray Foam Insulation in Denmark, WI
- Spray Foam Insulation in Luxemburg, WI
- Spray Foam Insulation in Little Suamico, WI
- Spray Foam Insulation in Oconto, WI