Residential Insulation Contractor
Madison, WI

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Duerst Insulation Technicians

Locally owned and operated for over 20 years, Duerst Insulation focuses on effective, long term insulation solutions.

We use a research-based approach to identify the root problem and apply a lasting result. Whether that’s a chilly home, high energy bills, moisture issues, or renovations and new construction.

We’re based just northwest of Madison, WI and service approximately 50 miles (click here for approximate map).

Susan M.
Susan M.
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It's rare in this day and age to find a contractor who responds quickly. Lee and crew are professional and knowledgeable as to what type of insulation I needed in my 1876 historical home. They were courteous and kept me informed of any issues they found before curing. They discovered that I had two separate attics. Both are now well insulated so my big old house is cozy and warm. I highly recommend using Duerst Insulation for your projects. An added plus was they filed all necessary paperwork directly to Focus on Energy and subtracted the rebate from my final invoice.
Rick L.
Rick L.
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From my first call, to an estimate, to have our concrete raised...all within one week. The workers were professional, prompt and respectful. We couldn’t be happier with the end results. Wish we would have had our concrete raised sooner! Excellent!
Debra O.
Debra O.
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The workers came to do the work within 2 weeks as scheduled and did an awesome job. They were courteous and let me know how they were going to do the work. They blew insulation in the attic and found places that needed more and added the extra. Then they donned their spray foam outfits and filled all the sills in the basement. They were very efficient and had the job done in one day. Afterwards, they pulled out their shop-vac and cleaned up after themselves. My house was almost cleaner when they left. My house is now warmer and more energy efficient than ever. I expect to have lower energy bills next winter. Thanks for the excellent service!
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Dean D.
Dean D.
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Had roof deck spray foamed and was very happy with the results. Team pleasant and easy to work with. Office responsive and timely to requests. Prices reasonable for what I was having done. Would not hesitate to recommend.
Vince V.
Vince V.
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Within 24 hours I had an estimate in my email. His crew was very professional. They explained to me what their process was. Each crew member acted like they wanted to be on my project. I don't see this today and I really appreciate it. The application of both types of insulation was top notch. When they left, at the end of each day, they cleaned after themselves. Thank You! I went to the home this morning, -20 degrees, and it was warm and comfy inside. No drafts!
Dan S.
Dan S.
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Great people!
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State Rebates & Incentives

Many (though not all) Wisconsin insulation projects are eligible for hundreds of dollars in rebates through the state’s Department of Energy. We typically are able to help at least one client capture a rebate each week.

We are certified to implement these rebates and complete nearly all the paperwork for you. We even instantly discount the rebate from your invoice, so you’re not left waiting for the rebate check to arrive.

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Know YOUR Numbers

Planning with general numbers often leads to inaccurate estimations and budgets. That’s one of the many reasons we offer free estimates. Whether you need a quick fix or are planning for work next year, work with actual numbers specific to you. 

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Learn More About Insulation

Insulation by Location

Attics and Ceilings
Walls and Basements

Insulation by Type

Fiberglass & Cellulose
Closed Cell Spray Foam

Comfort & Efficiency

Discomfort at home is draining

Your home is your corner of the world—you should be comfortable in it. Whether you want home to actually feel like the temperature on the thermostat or lower heating bills for years to come, insulation is the answer. It doesn’t hurt that, on average, each house we work on reduces emissions equivalent to permanently removing a car from the road.

Financial Returns

Better than the stock market

If you plan to live in your home for awhile, improving insulation yields better returns than the stock market. A huge portion of energy consumed in the Wisconsin home goes to heating, and better insulation reduces that expenditure considerably. It doesn’t take many winters for the insulation to pay for itself, and after that it’s money in your pocket.

Reduce Mold & Pests

Good insulation does more

Surprisingly, most moisture (condensation) develops in homes due to insulation and air sealing issues. This is because of dew points and humidity. Rodents and pests often travel through insulation to get inside.

The right insulation does more than insulate. It protects your family and home from safety hazards while repelling unwanted visitors.