Radon Mitigation in Crawlspace Homes?
Recently, several of our neighbors have discovered high Radon rates in their homes, which all have basements. I'm in the process of getting my home tested now, which is a crawlspace structure.
If the Radon tests come back showing high levels what is the most cost-effective way to reduce the radon levels? I've been looking into crawlspace ventilators, but I don't know how effective they are against radon.
Any advice is greatly appreciated.
Seal the crawl up.
Vapor barrier across the floor, sealed to the stem wall, insulate the side walls.
The vapor barrier will keep the radon from permeating through.
Get the reading first and if it is bad, you can put in a vented space under the vapor barrier and vent to outside.
I have passive radon mitigation in my crawl space. Didn't want it, but it is required here. The building code (IRC 2003 at the time) specified how it was to be done. It's exactly as Windows on Wash described. It vents up through the roof through a 4-inch pipe next to the soil stack. It's passive, meaning there is no fan or ventilator.
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