![]() ![]() other approved methods or materials capable of bridging nonstructural cracks.The following materials are specified in the IBC as acceptable waterproofing and dampproofing materials: (9.5 mm) portland cement parging applied to the exterior of the wall before applying damproofing. Except where a damproofing material is approved for direct application to the masonry, masonry walls are required to have not less than ⅜ in. 2) include prescriptive methods for waterproofing and dampproofing. 1) and the International Residential Code (IRC) (ref. ![]() Prescriptive Systemsīoth the International Building Code (IBC) (ref. ![]() Seams, terminations, and penetrations must be properly sealed. Many membrane systems are better able to remain intact in the event of settlement or other foundation wall movement. Sheet membranes and panels are less dependent on workmanship and surface preparation than coatings. Walls should be brushed or washed to remove dirt, oil, efflorescence, or other materials which may reduce the bond between the coating and the wall. Coatings should be applied to clean, structurally sound walls. Alternately, the main wall in some cases can be coated prior to constructing the cross wall provided that structural adequacy is maintained.Ĭoatings are sprayed, trowelled, or brushed onto below-grade walls, providing a continuous barrier to water entry. Because differential movement often occurs at these intersections, stretchable membranes are often used to span any potential cracks. Particular attention should be paid to wall penetrations and to re-entrant corners at garages, porches, and fireplaces. In all cases, manufacturer’s directions should be carefully followed for proper installation. In addition, most waterproofing and dampproofing systems should be applied to clean, dry walls. Repair of hairline cracks is typically not required, as most barriers will either fill or span small openings. (6 mm) should be repaired before applying a waterproof or dampproof barrier. Similarly, the barrier is typically carried above the finished grade level to prevent water entry between the barrier and the foundation wall. Waterproof and dampproof systems must be continuous to prevent water penetration. ![]()
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