Damproofing materials resist moisture pentration through foundation walls and similar surfaces subject to high humidity, dampness, or direct water contact but not subject to hydraulic pressures. Dampproofing usually involves applying one or two layers of a tar based coating to the foundation wall up to the finished grade elevation. Although damp proofing materials do not typically bridge cracks in concrete that may occur during the life of a building, damp proofing has a lower initial cost than waterproofing and is effective at stopping water vapor transmission....