Why Sub-Slab Depressurization Is the Gold Standard in Radon Mitigation
When I first started testing homes for radon in Jefferson County, Missouri, I quickly learned that no two crawl spaces or basements are built alike. Some houses sit on sandy loam, others on clay. Some have a thick concrete slab poured over a layer of gravel; others have a thin slab that cracked within the first year. And every single one of them can pull soil gas indoors if the pressure differences are right. Over the years, one method has proven itself again and again: sub-
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When I first started testing homes for radon in Jefferson County, Missouri, I quickly learned that no two crawl spaces or basements are built alike. Some houses sit on sandy loam, others on clay. Some have a thick concrete slab poured over a layer of gravel; others have a thin slab that cracked within the first year. And every single one of them can pull soil gas indoors if the pressure differences are right. Over the years, one method has proven itself again and again: sub-
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