Radon Testing

cracked foundation radon

What is Radon?

Radon is a health hazard with a simple solution. Radon is a colorless, odorless gas produced by uranium deposits in the ground. If present in high enough concentrations in the home, radon can lead to lung cancer if not properly mitigated.

The state of Wisconsin is located in an area of moderate-to-high radon concentrations, so it's important to conduct a radon inspection in each home. Radon can be hit or miss — one home may register high concentrations, while one right next door could register minimal amounts. Radon is measured in "picocuries per liter of air" amounts often written as pCi/L.

How Does Radon Enter My Wisconsin Home?

Radon seeps into enclosed areas through tiny gaps in the foundation, walls and floors of the home. As homes have become more tightly sealed and insulated, the radon has less opportunity to exit the home and can build up to dangerous levels.

Essential Indoor Air Quality Test

Because radon is undetectable without specific radon testing, it's highly recommended each home be tested for their levels of radon. If your household occupants include a smoker, the effects of radon combined with the effects of tobacco can elevate the risk of lung cancer. Understanding this potential risk and taking steps to remove radon will ensure your family's health and safety.

How Do Radon Detectors Work?

The radon detector that Wisconsin Home Improvement uses is a simple kit that is opened and left in the lowest living area of the home, either the basement or first floor. The test monitor is left in the location with windows and doors closed for at least 72 hours (though it can be left for as long as a week if needed). While normal air conditioning and heating may be used during the test time, do not use fans or other ventilation that draw outside air into the home. After testing, the test kit is sealed up and sent off to the lab. Results are usually available in 7 to 10 days.

What Do My Radon Test Results Mean?

Your test results will indicate the level of radon detected by the kit. The test results will have a score of the amount of radon detected in picocuries per liter, or pCi/L. Test results of below 4 PCi/L are considered safer, and no remediation is required. For radon levels higher than 4pCi/L, mitigation is highly recommended.

Luckily, fixing a home with high radon measurements is relatively straightforward and mitigation solutions generally cost between $800 and $1,000.

How Does Radon Mitigation Work?

A specialized radon contractor will seal any visible cracks in the foundation, then drill a hole into the foundation for a pipe vent to carry the radon gases from under the foundation and safely vent them outside the home. Other situations call for a venting fan to be installed to draw the radon gases up from the foundation and exhaust them outside above the roof line. After mitigation venting has been installed, it's a good idea to re-test for radon to ensure the system is working properly and safely.

At Wisconsin Home Improvement, we provide comprehensive radon testing. Should your test results indicate that radon mitigation is recommended, we can refer you to a skilled, local contractor. Call us today to schedule an appointment!

You and your family deserve fresh, clean air.

Schedule a radon test for your home with our experts!


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

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

    Jim Young, 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
  • 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
  • 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
  • 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
  • Your employees were prompt, courteous and friendly.

    Lois W., Menomonee Falls, WI
  • 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.

  • 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

  • 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.

  • 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
  • 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
  • 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.