Injection Foam Wall Insulation in Waukesha, Milwaukee & Southern Wisconsin

Foam injected into the closed walls of your existing home. No tear-out, and we never touch a wall in your living space.

Many older Southern Wisconsin homes have little or nothing inside the exterior walls. Cozy Walls drills small holes from the outside, fills every stud cavity with UPC 500 pour-in-place foam (R-3.9 per inch, and it air-seals), then patches the holes. Insulate all of your exterior walls for as little as a $5,000 service (based on square footage). With your Focus on Energy check*, that’s $3,575 net to insulate your whole home.

262-592-5381

*Focus on Energy rebate is not eligible in Illinois. **Discounts apply to whole-home projects with a minimum job size of $5,000. One discount per household.

Insulation That Works Inside Your Existing Walls

Cold rooms, drafty outlets and high heating bills in a Wisconsin winter usually trace back to the same cause: exterior walls and an open rim joist with little or no insulation. Old fiberglass and cellulose settle over the decades and leave the top of each wall cavity empty. Injection foam fills those cavities completely, top to bottom, without opening up a single interior wall.

On sided homes we lift a course of siding and drill through the sheathing. On brick homes we drill 3/4-inch, nickel-sized holes. Each cavity is filled with foam and every hole is patched. Most jobs are done in one day; two-story homes and homes over 1,400 square feet usually take two. Every job is backed by our lifetime transferable warranty.

Why Homeowners Consider Injection Foam Insulation

Adding insulation to suitable wall cavities can help address common comfort and energy-efficiency concerns in existing homes.

Improved Indoor Comfort

Fills the empty and settled cavities that make outside rooms cold in winter and hot in summer, so every room holds the same temperature.

Suitable for Existing Homes

Installed from the outside on sided and brick homes. No drywall removal, and we never touch a wall in your living space.

Reduced Heat Transfer

R-3.9 per inch and air-sealing, so your walls stop drafts as well as heat loss and your furnace runs less through a Wisconsin winter.

Sound Deadening

Foam-filled walls quiet traffic, neighbors and outside noise, a benefit homeowners notice the first night.

Where we work

Injection Foam Insulation Across Southern Wisconsin

Based in Waukesha and insulating existing homes throughout Southern Wisconsin, including:

Waukesha
Milwaukee
Brookfield
New Berlin
Pewaukee
Wauwatosa
West Allis
Franklin
Oak Creek
Glendale
Menomonee Falls
Colgate

Get your free estimate →

We do both

Open framing? We spray foam that too.

Injection foam is for walls that are already closed up. Anywhere you can see the studs, joists, or rafters, closed-cell spray foam is the better fit, and we do that too.

Crawlspaces
Rim joists
Unfinished basement walls
Open garage walls
Open garage ceilings
New construction
Sheds

See our spray foam work →

How the Process Works

How Injection Foam Wall Insulation Works

Home and wall assessment

We inspect the exterior walls and review the home's construction to determine whether the existing wall cavities are suitable for injection foam insulation.

Access points are prepared

Small holes are drilled from the outside, behind a lifted course of siding or nickel-sized on brick, so nothing is removed inside your living space.

Foam is injected into the wall cavities

Injection foam is introduced into the wall cavities through the prepared access points. The material fills available spaces and adds insulation between the interior and exterior sides of the wall.

Openings are sealed and the area is checked

Once the insulation work is complete, the access openings are sealed and the work area is cleaned. The completed installation is checked to ensure the wall sections have been properly addressed.

What Homeowners Say About Cozy Walls

    
 
 
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   Ariel Vargas 
 
 
 
 Trustindex verifies that the original source of the review is Google. 10/10 all across the board! Lydia is an absolute pleasure to work with. Such a ray of sunshine😝🌞 Great service, just great great great !
  
 
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   Rod Marquette 
 
 
 
 Trustindex verifies that the original source of the review is Google. Erik was very knowledgeable. The sales process was painless.  I noticed a difference in my home.
  
 
      Posted on Google  
   
   Shawn Flyte 
 
 
 
 Trustindex verifies that the original source of the review is Google. The Cozy Walls team was an absolute pleasure to work with. I have an older home that was originally built in the early 1900’s. It was drafty and I could hear a lot of road noise from inside my living room. That is until Cozy Walls did their thing. The noise reduction was the first thing I noticed. I couldn’t believe the difference. Erik was very informative and the Veteran Discount helped a lot! Definitely worth the cost as I’m already noticing a difference in my energy bill. Highly recommend!
  
 
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   Cade Walters 
 
 
 
 Trustindex verifies that the original source of the review is Google. This Company’s Great, Employees are very nice and hardworking. Would recommend to anyone looking to get their walls insulated!
  
 
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   Samuel Williams 
 
 
 
 Trustindex verifies that the original source of the review is Google. Took 3 times the quote to finish. Left unfixed exterior wall damage. I had to find someone else to fix.
  
 
      Posted on Google  
   
   Austin Brown 
 
 
 
 Trustindex verifies that the original source of the review is Google. Me and my wife just bought our first house and discovered that our bedroom was very cold compared to the rest of the house, and that our furnace was almost constantly running struggling to keep the house warm. Cozy Walls came out and insulated the entire house and garage and found out that most of our walls had no insulation anymore due to the age and the insulation deteriorating. Since having work done our bedroom is much warmer and our furnace runs a lot less, saving us money!

Amy and Zach run a great business and their crew was very professional. And it was very affordable and cost-effective.

They placed blankets over my motorcycles in the garage so they wouldn't get dirty during the work being performed and they cleaned up everything very well after.

Cannot recommend Cozy Walls enough if you need any insulation done in your house
  
 
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   Dawn Coker 
 
 
 
 Trustindex verifies that the original source of the review is Google. WELL worth the read! Customer service ?  This company is right on point! From Zack and Amy to the rest of their team, wow! Until I found these two companies, I had an awful and long time getting one to return my calls or come out for an estimate. I saw an ad on TV for Healthy Home Insulation, left a message on a Sunday, they came out the next day! Before Erik left he gave me an estimate for attic and basement (Healthy Homes) as well the walls from (Cozy Walls Insulation.) They were out here the following week to complete the job! I have HORRIBLE allergies that can cause my eyes to swell shut to causing vertigo. I was concerned that the smell of foam spray would be an issue. Amy, Cozy Walls said they would come out try a wall see how it went. If it was ok, complete the job, if not, we would figure something out. To me this is a company that truly cares about their customers! BOTH companies have gone above and beyond from start to finish. I would recommend them to anyone!
  
 
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   Lila Balboa 
 
 
 
 Trustindex verifies that the original source of the review is Google. They give an Awesome customer experience Very knowledgeable and explain the whole process!
  
 
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   Chad Nickelson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great honest company highly recommend if youre looking to update the insulation in your home!
  
 
      Posted on Google  
   
   Mike Jacobs 
 
 
 
 Trustindex verifies that the original source of the review is Google. This is a great company to do business with!
  
 
  
  
 
 
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Questions About Injection Foam Insulation

How much does injection foam wall insulation cost?

Insulating all of your exterior walls starts at a $5,000 service, based on square footage. With your $1,425 Focus on Energy check*, that’s $3,575 net for the whole home. Estimates are free, and we beat any other company’s written quote by $500.

How is injection foam insulation installed?

We drill small holes from the outside, behind a lifted course of siding or nickel-sized on brick, fill each stud cavity with foam, and patch the holes. Nothing is removed inside your living space.

What types of homes are suitable for injection foam insulation?

Most existing homes with closed exterior walls, including vinyl, aluminum and wood siding and brick. During your free estimate we scan the walls with a thermal camera to show you exactly where insulation is missing.

How long does injection foam insulation take to install?

Most jobs are done in one day. Two-story homes and homes over 1,400 square feet usually take two days.

Can injection foam insulation help reduce heating and cooling costs?

Yes. Filled, air-sealed walls slow heat loss in winter and heat gain in summer, so your furnace and air conditioner run less. Savings vary based on the home’s existing insulation, HVAC system, air leakage, climate, and energy use.