Radon gas removal / Discussions

How do you seal a crawlspace and remove radon gas from it?

I have a small crawl space, about 10' x 6' that is mostly gravel, and then an L-shape extends another 3' x 4' under some steps and is a thick concrete slab. I have a radon mitigation tube through the concrete slab (about 2' from the exposed earth) and weaves it's way to the roof (fan in attic). 3 of the crawl space wal...

Posted by Joe Curious Nov. 12, 2025 Radon in Homes - Mitigation 2 responses

Should you seal all rods and penetrations for a radon barrier?

...Radon seal to provide a water and gas barrier before installing xps foam panels on the interior basement walls? Yes, to reduce radon levels in homes and have an effective radon barrier, you would need to seal all holes protruding through the radon barrier or membrane. And by that, please know I mean ‘do your best’ of c...

Posted by D H Dec. 25, 2020 Healthy indoor air quality 1 response

How do you install a radon barrier in a crawlspace with an uneven floor?

...radon barrier and passive radon stack installation video          This page will also be valuable – how to insulate and prevent mold in a crawl space The most important thing to do in a crawlspace is make sure it has a vapor barrier covering the dirt, which also acts as the radon barrier. Radon gas is heavier than air,...

Posted by Reinhart Bigl Nov. 29, 2021 Radon in Homes - Mitigation 1 response