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Search Results for: "preventing radon through slab gaps" 1 Results Found

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The Groundwork Takeaway

Seal perimeter gaps using a flexible polyurethane sealant and a backer rod for gaps wider than 1/4 inch. Never use rigid concrete patches, as they crack with slab movement. Always clean the area thoroughly and apply a flexible caulk to ensure a permanent, airtight, and moisture-resistant barrier.

home4 min read

How to fill finished concrete floor gaps along the perimeter

Sealing concrete floor gaps prevents air leaks, pest entry, and moisture migration. Use flexible polyurethane sealants for a durable, airtight finish.

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