What Is Radon Mitigation and How Does It Work?

Radon is a naturally occurring radioactive gas that comes from the breakdown of uranium in soil, rock, and water. It can seep into your home through cracks in the foundation, gaps around pipes, or other openings. Long-term exposure is the second leading cause of lung cancer after smoking, according to health authorities.

Testing is the only way to know if your home has elevated radon. Simple test kits are available at hardware stores, or you can hire a radon professional to measure levels. If results show 4 picocuries per liter or higher, the EPA recommends mitigation. Even lower levels may warrant action, depending on your situation.

A radon mitigation contractor will first assess your home's layout, foundation type, and construction. They will identify the right spot for the suction point and plan the pipe route, often through a garage or closet. The installation typically takes a few hours, and the system is usually not very noticeable once in place.

After installation, the contractor will run a follow-up radon test to confirm that levels have dropped. This test can take from a few days to a few months, depending on the method used. The goal is to bring radon levels below the EPA action level of 4 pCi/L, and many systems achieve much lower readings.

• Active soil depressurization is the most effective method
• Vent pipe routes from under the slab to above the roofline
• A manometer shows if the fan is running properly
• Sealing foundation cracks improves system efficiency
• Follow-up testing verifies the system works
• Systems require minimal maintenance, usually just checking the fan

Radon can also enter your home through water, especially if you use a private well drilled into radon-bearing rock. However, this is less common than soil entry. If you have a well, you can test your water for radon, and treatment options include aeration or carbon filtration systems.

Water damage and high humidity can affect your home's foundation, creating new pathways for radon to enter. Cracks from settling or water pressure can open up over time. If you experience flooding or water intrusion, it is wise to inspect your foundation and reseal any new cracks. For help with water damage, local water damage pros can assist with cleanup and repairs.

Keep your foundation well-maintained to reduce entry points for both water and radon. Regular inspections after heavy rains can catch issues early. If you need help with water damage, local water damage pros can assist with cleanup and repairs.

• Test for radon in both air and well water if applicable
• Seal foundation cracks promptly to block entry points
• Fix water leaks quickly to prevent structural damage
• After flooding, have a professional inspect your foundation
• Maintain good drainage around your home to reduce soil moisture