• Most customers qualify for a $1,425 rebate through Focus On Energy*
    *Wisconsin homes only — not available in Illinois
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Injection foam wall insulation · Lake Country, WI

Lake Country homes are built for summer. Your walls should be built for winter.

The old lake cottages turned year-round homes, the historic houses near downtown Hartland and Delafield, the 1960s–80s ranches around the lakes — many have little or nothing in the walls. Cozy Walls fills them with injection foam from the outside, in a day or two, without touching a wall in your living space.
Erik, the owner, does every Lake Country estimate himself.
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Why Lake Country houses lose so much heat

A lot of Lake Country housing started life as a summer place. Cottages that were never meant for January got winterized one room at a time, and the walls were often the last thing anyone touched.
  • Converted lake cottages: thin, often empty walls that were never built for year-round living.
  • Older homes near downtown Hartland and Delafield: plaster over lath, siding over sheathing, and an empty cavity in between.
  • 1960s–80s ranches: empty walls, or fiberglass batts we can usually fill around. Loose blown-in insulation we check for at the estimate, because foam can’t flow through it.
The result: a furnace that runs all winter and a house that still feels drafty.

What we do in Lake Country

Whole-home wall insulation

Every exterior wall filled with injection foam from the outside. Most homes in one day; two-story or over 1,400 sq ft in two.

The one room that never warms up

Usually an open rim joist or an empty exterior wall. We seal the rim joist and fill the walls around it.

Rim joist and basement walls

The leakiest spots in a Lake Country basement, sealed with foam. Standard rim joist sealing is a flat $2,500, or $2,000 with a wall job.

Proof, not promises

Blower-door test and thermal scan before and after on every whole-home job.

What the day looks like

Real Cozy Walls jobs in Southern Wisconsin this month.

One row of siding off

As far as we open the house.

Foam in

Every cavity filled top to bottom.

Siding back on

You’d never know we were there.

What it costs in Lake Country

Insulate all of your exterior walls for as little as a $5,000 service (based on square footage) — that’s $3,575 net after the $1,425 Focus on Energy rebate check* that we file for you. Military ($750**), first responder, teacher, and 60+ ($500**) discounts apply on whole-home projects. Show us a lower written quote for the same scope and we’ll beat it by $500. Erik gives you the number in writing at the estimate, and it’s good for 30 days.

*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.

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Serving Hartland, Delafield, Pewaukee, Nashotah, Okauchee, Summit, and Chenequa.

Free estimate. Erik, the owner, comes out himself.

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Get your free Lake Country estimate

No pressure. No sales script. Just Erik and real numbers.

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