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Radon Testing

Our radon testing and inspection is often more important than most realize. Radon invades a home unknowingly and is a cancer causing radioactive gas that you cannot see, taste, or smell. Air filed with this gas increases your risk of lung cancer. All Michigan homes have varying levels of radon and in some counties it's more of a problem than others. Radon testing is very affordable compared to the cost of exposure.

Research & Analyze

We use top of the line radon monitors to measure radon levels. Our active radon monitor begins testing at the home inspection. 48 hours later when radon testing concludes. Any result of 4 picocuries per liter (pCi/L) or higher requires radon mitigation and issues need to be fixed.

Strategic Placement. Electronic Results.

Our radon testing device is strategically placed by the home inspector. When the machine shuts off, testing is complete and results are electronically sent for analysis. You will receive an email with the results.

Should I get Radon testing with a home inspection?

Radon Levels in Michigan

It’s important to understand that all homes in Michigan absolutely should be doing radon tests every few years; yet seldom do. Radon is the 2nd leading cause of terminal lung cancer.

1 in 4 homes will have high radon readings. In some counties, “as many as 40-50% of the homes are likely to have a radon problem.” The map below shows that some of the most populated areas in Metro Detroit have an orange level.

Ask yourself when was the last time the home you are looking at buying was tested for Radon? Maybe 15 years ago. Maybe never.

michigan map of radon zones
10 facts about radon and lung cancer

There is only one way to know if radon levels are too high in a home.


10 Facts About Radon

  1. New construction homes should ask if radon-resistant construction features were used and if the home has been tested and what the results are.
  2. Breathing radon can increase your risk of developing lung cancer. Lung cancer caused by radon exposure has low survival rates.
  3. There are NO immediate symptoms of radon exposure. It can take years before symptoms appear.
  4. Radon gas that is outdoors is diluted so it is not a health risk but radon gas trapped in homes builds to dangerous levels.
  5. The average indoor radon level across the country is 1.3 picocuries per liter of air. Even homes with radon levels of 2 picocuries pCi/L it’s recommended they are fixed and use a radon mitigation system.
  6. You will need to fix the issues in the home causing radon issues if the level is 4 picocuries per liter or higher. If the radon level is less than 4 pCi/L it still poses a risk and in many cases it can be reduced.
  7. You can fix a radon problem! Even very high levels can be returned to acceptable levels.
  8. If the home seller does not have radon test results, you should have the home tested.
  9. Radon testing timelines (48 hour continuous testing) that Top Floor Home Inspections provides the best period of testing along with maintaining time-sensitive nature of home purchasing. Our reporting arrives quickly after testing is completed. Results are emailed to both homebuyer and your Michigan real estate agent.
  10. Top Floor Home Inspections Radon testing uses the best devices in the profession to get reliable and time sensitive results. Our testing is affordable!
Deaths each year from radon exposure lung cancer
4 pCi/L Radon Exposure is this many times the risk of dying in a car crash
Homes in the US with Radon levels Above 4 pCi/L (Millions)