If your home has elevated levels of radon above the U.S. Environmental Protection Agency’s (EPA) recommended action level of 4.0 picocuries of radon per liter of air (pCi/L), then a radon reduction system (often referred to as a mitigation system) should be installed.
Fortunately, most mitigation systems cost no more than other common home repairs, ranging from $800 to $1,200.
The method of mitigation depends on the type of foundation your home has. Methods differ for basements, crawl spaces, engineered floors, slab on grade, or any combination of these foundations. See the photos below for examples of correct and incorrect practices.
Tips for Hiring a Contractor
When hiring a contractor, use a certified radon mitigation contractor who is trained in proper and effective radon mitigation.
- Gold Star Radon Mitigators
- Ensure the contract stipulates that the contractor will follow all EPA protocols regarding radon mitigation and will obtain all applicable local permits.
- Consider using the EPA checklist for selecting a contractor
- Get bids from multiple contractors.
- Obtain a guarantee that radon levels will be reduced to 4.0 pCi/L or below.
- Ensure your contractor is bonded and has proof of liability insurance.
Installing a Mitigation System Yourself
If you decide to mitigate yourself, information about mitigation system installation and design is available in the manual Protecting Your Home from Radon, a Step-by-Step Manual for Radon Reduction by D. L. Kladder. It explains everything you need to know about fixing a radon problem in your home.