Crawl Space Moisture Control - Sealing the Foundation Walls
While we sealed the vapor barrier along the foundation walls, the homeowner chose not to insulate their crawl space. We would suggest swapping the fiberglass insulation batts in the floor joists with either closed-cell spray foam or our custom foamboard insulation pieces on the foundation walls. This would not only insulate the entire crawl space but act as an air barrier and vapor retarder, protecting the crawl space from outside moisture seeping through the porous foundation walls.