Crawl Spaces & Moisture Control

Step-by-step guides, tested in real houses.

Heavy white polyethylene vapor barrier being unrolled across crawl space dirt and taped around a block pier

ExteriorCrawl Spaces & Moisture Control10 min read

Install a Crawl Space Vapor Barrier That Actually Seals

A step-by-step guide to lining a crawl space with a sealed vapor barrier: 6-mil versus 12-mil poly, seam overlap and taping, and wrapping piers and walls.