crawl space vapor barrier

https://themoldremediationprosdigest.clearhavendigest.com/posts/new-standards-for-mold-remediation-pros-address-growing-health-concerns

Laying a crawl space vapor barrier is a must if you want to keep moisture from seeping up through the dirt and rotting your floor joists. I usually put down thick polyethylene sheeting, overlapping seams by a foot, and seal them with tape. It traps humidity below, prevents mold and musty smells, and makes the whole underfloor area way less damp. Just leave it loose around vents and pipes to avoid tearing.