Crawl space encapsulation is the process of sealing a home's crawl space with a heavy-duty vapor barrier across the floor and walls, conditioning the air, and addressing insulation and ventilation. A typical PNW encapsulation runs $8,000-$18,000 depending on square footage and moisture conditions.
You'd see this when a homeowner in Vancouver, WA discovers wet fiberglass insulation falling from the crawl space — CRM Services scopes a full encapsulation including new vapor barrier, vent well replacement, and pipe insulation.
Crawl space remediation is one of the highest-impact services for PNW homes and a recurring scope in CRM Services' multi-trade project work.
Why encapsulate a crawl space in the Pacific Northwest?+
PNW soil moisture and 37+ inches of annual rainfall create high humidity under homes, leading to mold, wood rot, and pest issues. Encapsulation cuts that off.
Does encapsulation include insulation replacement?+
Often yes — old fiberglass insulation in PNW crawl spaces is usually moisture-damaged and falling. A full encapsulation typically replaces it with foam board or rigid insulation against the rim joist.
Talk to a real contractor.
Free onsite consultation and a line-item estimate you can actually read.