Spray Foam Insulation in Green Bay, WI

Spray foam insulation in Green Bay does two jobs at once: it fills the space and it stops air from moving through it. That matters in a city where normals from Austin Straubel airport show about 68 days a year at or below freezing and 19 nights below zero. Warm air that leaks out through the attic and the rim joist is the heat you paid for, and it is also what melts roof snow into ice dams. We are spray foam insulation contractors who also blow in loose fill and remove old insulation, so the quote you get is built around your house, not around one product.

What we work on most

Older homes near downtown and on the east side often have a few inches of settled fill in the attic, open rim joists in the basement and walls with little or nothing in them. Newer homes in Howard, Bellevue and Suamico tend to have decent attic depth but cold rooms over garages and leaky bonus-room kneewalls. Detached garages, pole buildings and shops are a big part of the work, too, since closed-cell foam on steel or wood framing stops condensation and holds heat.

Closed cell vs open cell

Closed-cell foam is dense and rigid, rated at R-5 to R-7 per inch by HomeGuide. It slows water vapor at normal thickness, adds stiffness and is our usual pick for rim joists, foundation walls, crawl spaces and steel buildings. Open-cell foam is soft and expands far more, rated at R-3.5 to R-3.7 per inch. It seals air and quiets sound for less money per square foot and suits interior cavities and roof lines where a vapor plan is in place. Many houses get both, plus blown-in cellulose (R-3.1 to R-3.8 per inch) on the attic floor.

What the code asks for here

Brown County is in Climate Zone 6A. Wisconsin's Uniform Dwelling Code is based on the 2009 IECC with state amendments, and the Insulation Institute's summary lists R-49 for ceilings and R-20, or R-13 plus R-5 continuous, for wood-frame walls in Zone 6. Existing homes do not have to be brought up to those numbers, but they are a useful target when you add insulation.

Spray foam insulation cost

National guides put installed spray foam at $1.50 to $5.00 per square foot (HomeGuide), with closed cell at the high end. A whole house runs $8,000 to $20,000 by HomeGuide's numbers and $10,000 to $30,000 by Fixr's, and many installers set a minimum of $1,000 to $2,000. Rim joists alone usually fall around $2,000 to $2,500. Your price comes from measuring the actual areas, and the written estimate is what you pay.

Choosing insulation contractors and companies

Whoever you hire, ask the same questions: which foam goes where and at what thickness, how they handle ventilation and cure time (HomeGuide advises staying out for at least 24 hours), what they do about wiring and old insulation, and whether the quote lists R-values area by area. A clear answer to each one tells you more than a low price does. Get a free estimate

We work in Green Bay and the communities around it: De Pere, Ashwaubenon and Allouez along the Fox River; Bellevue and Ledgeview on the east side; Howard, Suamico and Little Suamico to the north and west; Hobart and Lawrence in the growing southwest; Scott along the bay shore; and farther out in Pulaski, Denmark, Luxemburg and Oconto. The housing changes a lot from one to the next. Allouez and the older Green Bay neighborhoods are mostly built out and full of mid-century homes. Hobart, Lawrence and Ledgeview added thousands of houses in the last 25 years. The rural towns mix farmhouses, pole sheds and newer builds on acreage. Each town page below covers what we see there.