Foam insulation for your whole home — from $99/month
We fill the empty walls of your existing home with injection foam and seal your rim joists with spray foam. No tearing out drywall. Warmer rooms this winter.
We insulate the parts of your house nobody else can reach.
Most Wisconsin homes built before 1990 have walls that are empty or nearly empty. We fix that from the outside, without a remodel.
Injection foam wall insulation
We remove one row of siding, drill small holes, and fill every wall cavity with foam. Siding goes back on. Nothing inside your living space gets torn apart.
How injection foam works →Rim joist & box sill spray foam
Uninsulated rim joists turn your floor joists into wind tunnels in the winter, making your floors freezing cold. We seal them with closed-cell spray foam.
Rim joist insulation →Spray foam for everything else
Basement walls, garages, additions, pole barns, shops, and new construction. Closed-cell spray foam insulates, air-seals, and blocks moisture in one layer.
Spray foam insulation →You feel it the first cold night.
No more cold rooms
Filled walls and sealed rim joists stop the cold spots, chilly floors, and the one room that never warms up.
Lower heating & cooling bills
Your furnace and AC stop fighting empty walls, so they run less all year.
Fewer drafts
Foam fills every gap in the cavity, so outside air stops leaking through your walls.
A quieter house
Foam deadens road noise, neighbors, and lawnmowers coming through the walls.
tighter after install — a recent Southern Wisconsin home, measured with a before-and-after blower door test. Every whole-home job gets the same test, so you see the proof in writing.
Real prices, right on the website.
Your exact price comes from measuring your home, and Erik gives it to you in writing before he leaves. Here's what most homeowners pay.
Most Southern Wisconsin homes$6,000 – $14,000
Standard 2-inch, any size home$2,000
Focus on Energy rebates are available on qualifying Wisconsin projects.* As a Focus on Energy Trade Ally, we handle the paperwork for you. Rebates & discounts →
*Focus on Energy is a Wisconsin program. Not available on Illinois homes.
Do the whole house now and pay over time. Apply online in minutes and compare offers.
Ballpark only. Your price is set at your free estimate. Payment example: $6,800 financed at 12.4% APR for 120 months = 120 monthly payments of $99.14. Rates and terms vary by credit approval. Financing is provided by third-party lenders through Enhancify, not by Cozy Walls.
The man in the uniform is the man at your kitchen table.
I'm Erik Hoffman. I spent 29 years in the Army and retired as a Master Sergeant. Then I spent seven years selling injection foam for other companies and saw where they cut corners.
Now I own Cozy Walls, and I do every estimate myself. No salesman. No script. Just the truth about your walls, and the thermal camera to prove it.
— Erik Hoffman, Owner
- Retired U.S. Army Master Sergeant, 29 years
- Lifetime transferable warranty on the foam
- No pressure, and no sign-today tactics
- BBB Accredited · Focus on Energy Trade Ally
What your neighbors are saying
“We just bought our first house and our bedroom was very cold — the furnace ran constantly. … Now the bedroom is much warmer and the furnace runs a lot less, saving us money.”
Austin B. · Google review“I have an older home from the early 1900s. It was drafty and I could hear road noise in my living room — until Cozy Walls did their thing. The noise reduction was the first thing I noticed.”
Shawn F. · Google review“Erik was very knowledgeable. The sales process was painless. I noticed a difference in my home.”
Rod M. · Google reviewGet your free estimate
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