The drawbacks include an inability to seal larger cracks or holes left by form ties and the potential for damage by coarse or careless backfill. Though less frequently recommended in modern residential construction, it is still an acceptable form of treatment in many situations. Waterproofing is only required by the IRC "in areas where a high water table or other severe soil-water conditions are known to exist."ĭampproofing is a coating, usually asphalt-based, that is either sprayed on or hand applied to the outside of the wall. Any concrete or masonry foundation walls "that retain earth and enclose interior spaces and floors below grade shall be dampproofed from the top of the footing to the finished grade." The IRC then provides a list of the permissible materials, which include bituminous coating and acrylic-modified cement. The International Residential Code (IRC), in Section R406, specifies the conditions that require either dampproofing or waterproofing. Shop for waterproofing products & vapor barriers designed to protect your foundation.īuildings have been dampproofed for years, a practice that used to be mistakenly referred to as waterproofing. Dampproofing is intended to keep out soil moisture while waterproofing keeps out both moisture and liquid water. There is a distinct difference between dampproofing and waterproofing.
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