Room over the garage · Southern Wisconsin
It’s the most common call we get: one bedroom or bonus room that never warms up, a thermostat cranked for the whole house, and a furnace that won’t quit. The problem isn’t your furnace. It’s the walls around that room and the garage underneath it — and we fix both without opening a wall in your living space.
Most homes: one day. Two-story homes or anything over 1,400 sq ft: two.
A room over a garage is the hardest room in the house to keep warm, and it was usually built with the least insulation. Four things are working against it at once:
That is why turning up the thermostat doesn’t work. You are heating the whole house to try to reach one room, and the heat leaves that room as fast as it arrives.
One visit. From the outside and the garage. No drywall comes down in your living space.
We pull one row of siding, drill each stud cavity, and inject foam until it’s packed — including around wiring and blocking. Siding goes back on the same day.
The wall between the garage and the house gets the same treatment from inside the garage. Small holes, patched when we’re done.
Where the floor over the garage meets the outside wall, we close the gap that’s been feeding cold air under that room.
A blower-door test and thermal scan before and after — on every whole-home job — so you can see the difference, not just feel it.
Real Cozy Walls jobs in Southern Wisconsin this month.


Foam going into each cavity behind the siding. Nothing touched inside.


Drilled and filled from inside the garage. Patched when we’re done.


Same siding, same house. You’d never know we were there.
The first cold night, that room holds its temperature instead of dropping the minute the furnace cycles off. The floor stops being cold to walk on. The rest of the house stops being overheated to compensate. And the furnace runs less — which is where the money comes back.
Homeowners tell us the same thing in different words: “The kids sleep in there now.” “I finally moved the office back upstairs.” “I stopped closing the door to that room.”
“We just bought our first house and our bedroom was very cold — the furnace ran constantly. Since having the work done our bedroom is much warmer and our furnace runs a lot less, saving us money.”
Austin B. · Google review
Most whole-home projects run $5,000–$12,000 depending on the size of the house, before the $1,425 Focus on Energy rebate* and any discount you qualify for ($750** military, $500** first responder, teacher, or homeowner 60+). If it’s just the room over the garage and the garage, it’s less — our minimum job is $1,000. Erik, the owner, does every estimate himself and gives you a firm written number. There’s no sales script and nobody asks you to sign on the spot.
*Focus on Energy is a Wisconsin program. Rebates are not available on Illinois homes.
**Discounts apply to whole-home projects with a minimum job size of $5,000. One discount per household.
Name, phone, best time to call — Erik calls you back, usually the same day.