Water & Damp Proofing Coating

Water & Damp-proof the exterior surface of the below-grade walls of basements and unvented crawlspaces. Ensure proper surface, vertical, and horizontal drainage are in place at the foundation.
Concrete: Cover the exterior surface of poured concrete, concrete masonry, and insulated concrete forms with a damp-proof coating. Additional recommendations are as follows (EPA 2011):
Poured concrete- If installing below-grade poured concrete, customize the mixture to make it more impermeable to water migration or apply a damp-proof coating directly to the exterior face of the concrete such as a brush or roller-applied asphalt emulsion or sprayed-on closed-cell polyurethane foam.
Masonry block- If applying a damp-proof coating to a rough surface such as concrete masonry block walls, coat the exterior surface of the walls with a layer of purging prior to applying the damp-proof coating.
Insulated concrete forms- If installing below-grade insulated concrete forms, use manufacturer-approved materials for damp-proof coating.