Dirt floors
A dirt crawl space under a home is a very bad idea. The earth has very high humidity in the soil.
CleanSpace liner
The clean space liner is carefully cut and installed. The workers will usually be working in their socks to keep the liner clean. That's how clean your crawl space will be.
CleanSpace liner
Crawl Space Encapsulation System completely isolates your home from the earth.
CleanSpace Liner
Small holes are drilled into the top of your crawl space walls, and nylon fasteners are installed to permanently secure the clean space liner to the walls.