Finishing your basement with a radon system

Can you finish a basement that has a radon system?

Yes, but talk to your radon contractor first and retest when you're done. PA DEP says major changes like turning a basement into living space can change radon levels and could affect your warranty.

What should you check before you frame?

• Test first. PA DEP says it's especially important to test the area for radon before you start a big renovation like finishing a basement.
• Call your radon contractor. DEP says to ask whether the changes could void any warranties.
• Keep the fan out of the new living space. DEP's installation rules say the exhaust fan must not be in or below a livable area. It belongs in an unoccupied attic or outside, not in a basement.
• Keep the warning device where you can see it. Every active system must have one, placed where it can be seen or heard easily.
• Keep the label visible. DEP says systems must be clearly labeled so nobody changes them by accident.

What if you don't have a system yet?

If your test shows a radon problem, PA DEP says radon-resistant techniques can be added cheaply as part of the renovation. Talk to a certified mitigation company before the walls go up.

How do you keep the system working?

• Never turn the fan off. DEP says it must run all the time.
• Look at the warning device regularly.
• If it shows the system isn't working, call a contractor to check it.

Do you need to test again after?

Yes. PA DEP says renovations can change radon levels in any home, so always test again after the work is done. Test in the lowest lived-in area, which is now your finished basement.