• Most customers qualify for a $1,425 rebate through Focus On Energy*
    *Wisconsin homes only — not available in Illinois
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Services

Our Insulation Services

Injection foam for finished walls. Spray foam for everything else. Veteran owned, Waukesha based, and the owner does every estimate.

Cozy Walls installer drilling siding to inject foam insulation into the walls of a Wisconsin home

Injection Foam Wall Insulation

Fill your finished walls from the outside. No drywall torn out, and most homes are done in 1 to 2 days.

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 Finished closed-cell spray foam insulation on open stud walls by Cozy Walls in Southern Wisconsin

Spray Foam Insulation

Closed-cell spray foam for open walls, pole barns, crawlspaces and bonus rooms. Seals and insulates in one pass.

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 Rim joist sealed with white closed-cell spray foam along a cinder block foundation wall

Rim Joists & Box Sills

The top of your basement wall is one of the biggest air leaks in the house. We seal it tight with closed-cell foam.

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 Retrotec blower door reading after injection foam insulation: 989 CFM50

Blower Door Testing

We measure how much air your home leaks before and after, and use a smoke pen to show you exactly where the leaks are. Included free with every whole-home job, or $600 on its own.

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 Installer injecting foam into drilled holes in drywall with a foam hose

Basement Walls

Cold finished basement? We insulate the walls without tearing out the drywall.

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 Closed-cell spray foam on open garage stud walls in Fort Atkinson, WI

Garage Walls

Warmer workshops, and a warmer room over the garage. Open or finished walls.

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 Installer on a ladder filling a wall with injection foam

Noise Reduction

Foam-filled walls quiet road traffic, barking dogs and loud mufflers. Customers notice it the first day.

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 Two Cozy Walls installers injecting foam and patching an interior wall

Interior & Shared Walls

Quiet a bedroom, office or bathroom wall, or the wall you share with a neighbor.

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 Thermal camera image showing filled and unfilled wall cavities after injection foam

Free Thermal Imaging

Not sure what’s in your walls? Erik checks them with a thermal camera at your free estimate.

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How leaky is your home?

A blower door test measures air changes per hour (ACH50): how many times every hour the air inside your house gets swapped for outside air while we put the home under pressure. The lower the number, the tighter the house, and the less heat you pay to push out through the walls.

  • 0.6ACH50Passive HouseThe tightest homes built anywhere.
  • 3ACH50National energy code for new homesThe standard in most of the country today.
  • < 7ACH50Wisconsin’s code for a new homeWhat a house built in Wisconsin today has to beat.
  • 12+ACH50A typical older, leaky homeCommon in homes built before modern codes, especially with empty or settled walls.

Where does your house land? We’ll test it, then show you every leak with a smoke pen.

Code figures: Wisconsin Uniform Dwelling Code (SPS 322) and the International Energy Conservation Code.

Not sure what your home needs?

Free estimate with thermal imaging across Southern Wisconsin.

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