Insulation For Existing Homes

insulation in wisconsin

Looking for an expert in home insulation? You've come to the right place at Wisconsin Home Improvement. Our founding company has been a trusted home insulation contractor since the 1930s. In 1984, we created a separate company—Wisconsin Home Improvement— to focus exclusively on improving the performance of existing homes with insulation, including lowering utility bills.

Our long history with different types of insulation means we understand the unique characteristics and benefits of many types of insulation solutions to make your home comfortable and efficient.

Multiple Options for Roof, Wall & Basement Insulation Upgrades

Wisconsin Home Improvement is able to assess your home's performance and then recommend the type of insulation that best suits your energy efficiency needs. For existing homes needing added insulation, we have a number of options to consider:

Spray Foam Insulation

This type of insulation has the ability to expand into any space, forming an excellent air barrier that reduces noise, keeps pollutants and allergens out and provides superior comfort and energy efficiency. WHI uses Icynene, a closed cell spray foam consisting of two parts that are mixed on-site and applied by our trained insulation pros.

Fiberglass Insulation

Ideal for walls, attics and ceilings, fiberglass can be applied in loose fill/blown-in for dense pack in walls or in batt form laid in attics. Fiberglass is non-combustible, non-corrosive, formaldehyde-free and moisture and mold resistant.

Cellulose Insulation

This natural, plant-based product is a safe, dependable and cost-effective solution that offers noise reduction and moisture and mold resistance. Cellulose is usually blown into spaces and densely packed to create an effective barrier.

Thermax™ Rigid Foam Insulation

Applied in basements and crawlspaces, these sheets of insulation are designed for both insulation and moisture protection. Thermax is applied in basements to the interior walls in combination with spray foam insulation in the box sills.

Recognized Insulation Expertise

As Wisconsin’s only Pearl certified insulation contractor, Wisconsin Home Improvement is dedicated to performing high quality work and delivering outstanding customer service.


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Attic Insulation

attic insulation wisconsin

The attic can be the site of a good portion of your home's heat loss and energy inefficiency, primarily because heat rises. Poorly-insulated homes can lose as much as 25% of their energy through the roof and attic! For this reason, our team pays special attention to everything directly under the roof when we conduct a home performance audit.

Basement Rim Joist

box still foam

In many homes across southeast Wisconsin, basements are cool, damp and not very comfortable. While many basements are designed for housing mechanicals like furnaces, water heaters and laundry appliances, they can also provide extra living space for families. Making sure these areas are comfortable and properly insulated is crucial. That's where Wisconsin Home Improvement comes in!

Wall Insulation

wall insulation installation

If not properly insulated, the walls of your home can account for as much as 35% of your home's lost energy. If you think about it, exterior walls probably have the biggest impact on your comfort—they're usually the largest total area of the house that can lose conditioned air.

Floor Insulation

floor insulation
When talking about insulating a home, most people think about attics and walls. But insulating the floors over the basement or an unconditioned crawlspace can improve your home's comfort and improve energy efficiency. Sealing up the gaps and spaces where air can infiltrate into the main floor living areas can also prevent moisture and mold from building up.

Crawlspace Insulation

crawlspace insulation wisconsin

Crawlspaces can cause multiple issues in the main living areas of your home. Oftentimes, these areas have insulation that has been neglected for too long. When not well-sealed, insulated and protected from moisture, crawlspaces can make your home feel cold, drafty and musty-smelling.

Insulation Removal

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Wisconsin Home Improvement will safely remove and replace the insulation in your Wisconsin home and replace it with high-performance insulation for greater home comfort and lower utility bills year-round.

Spray Foam Insulation

spray foam insulation wisconsin

With the weather of all four seasons keeping us on our toes throughout the year here in Wisconsin, there are months when your home needs to be cool and others when you can’t seem to turn the thermostat up high enough. Replacing your old fiberglass insulation with spray foam insulation can help ensure your home is energy efficient, healthy, and comfortable all year round.

We've got your high-performance insulation solutions.

Contact our team to get started today!


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  • Teresa

    I am so grateful for everyone at Wisconsin Home Improvement. I will always recommend you to anyone looking to have insulation services.

  • Jenny P.

    I just wanted to extend a thank you to you and all of your employees who have spent time at our home fixing our attic issues.

  • James V.

    Dear Steve, 

    We at Grace are so pleased with the quality of work and the professionalism of the crew that did the insulation. Mike and Igor were so respectful of the building and its contents, and so nice to everyone in the congregation who was working at church. 

    James V., Milwaukee, WI
  • Cindy S.

    I really feel compelled to give a "shout out" to everyone I have come into contact with at WHI. First off - Jody. You are so friendly and helpful on the phone, forgiving me for my inability to "on-line sign", switching up of dates, declining work and then changing my mind.

    Cindy S., Whitefish Bay, WI
  • Tim S.

    Steve, just a side note and I would not send this if it was not completely true - Mike and Pete were both fantastic. I was impressed. We had just had other major construction and have many comparatives for the work WHI did. I would come home and never know they had even been there.

  • Mike & Erin M.

    We wanted to provide feedback on our experience with Peter, who did our home energy audit.  We felt he went above and beyond what was expected of him.  He was very thorough and was genuinely concerned about any issues causing inefficiencies in our home.  He explained things in terms we... Read More

  • I wanted to thank you and your team again for the
    great work you did and insulating our home. It is only been a week, and the
    difference is amazing. Every room in this house feel substantially warmer.

  • Your employees were prompt, courteous and friendly.

    Lois W., Menomonee Falls, WI
  • Thursday and Friday of last week one of your crews were at my home putting in some additional insulation and doing some other work. I just wanted to tell you that my wife and I were very impressed with the professionalism of your men.

    John & Jennifer P., WI
  • Please thank your crew for the great job they did here. They were all very personable, worked very hard, and they took the time to explain what they were doing.

    Barbara F., Belgium, WI
  • Jan and I were amazed and impressed by the crew’s positive work ethic coupled with their gracious and friendly manner. Obviously they knew what they were doing and set to task with quickness and absolute thoroughness… you have our deepest appreciation.

    JoAnne and Jan V., Greendale, WI
  • The work your team did is fantastic! Also I would like to compliment your crew on their professional approach to our house and their work.

    Ryan, WI
  • Steve and Frank are very good representations of your firm -- very professional. Thanks!

    Jim Young, WI
  • We were pleased with work done by Mike and Kevin. They deserve a pat on the back. Thanks!

    Eugene Hefter, WI
  • I just wanted to take a minute to thank you and your Madison crew for the great work they are doing. Over the last few months I have worked closely with Dann, Roger, Marc and Jeremy and am extremely impressed with their attitudes and the quality of their work.

    Brandon Langeteig, Project Home, Inc.
Save up to 73% off insulation, air sealing & ventilation packages while incentives are still available!