SURFACE PREPARATION OF WALLS
Prior to the application of waterproofing materials on concrete or masonry walls, the walls shall be prepared in accordance with Section 1807.2.2.1.
This section implies that the wall substrate must be properly prepared to receive waterproofing materials. The wall must be free of all voids, openings, cracks, honeycombs, fissures and other imperfections prior to the application of the waterproofing material.
Concrete walls can be repaired using bituminous materials or other products approved by the material manufacturer.
Masonry walls shall be parged below ground level on the exterior surface using not less than 0.375-inch of Portland cement. The only exception is approved for application directly to the masonry.