Foundation Wall Water/Damp-Proofing =

Foundation Wall Water Barrier

Porous foundation concrete products should be treated to avoid water seepage into the home. Builders treat below-grade walls with a damp-proof coating such as an asphalt emulsion.  A plastic drainage plane may be used instead of, or in addition to, the damp proof coating.  This surface coating may be joined by a layer of insulation. Rigid fiberglass allows water to drain through it but rigid foam polyurethane rated for soil contact is another option. Gravel also provides a good backfill for draining. Water should flow through the gravel toward the foundation footing where a perforated drain pipe will carry it away from the structure.