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What is a Water-Resistive Barrier (WRB)?

Builders install a variety of products on the exterior of foundations, above-grade walls, and roofs as water-resistive barriers (WRBs), required by the International Residential Code (IRC). Water-resistive barriers are also called weather-resistant barriers, but the former term is now considered preferable. WRBs are buildings’ last and primary exterior water barrier. WRBs vary widely in their vapor …

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Foundation Dampproofing, Waterproofing, and Protection for Insulation at Grade

Dampproofing and Waterproofing for Foundations For basements and crawl spaces, install dampproofing, waterproofing, capillary breaks,  insulation, and drains as soon as possible so that rain during construction doesn’t create moisture problems in the new home. Dampproofing is a sprayed or rolled-on vapor retarder that provides the minimal protection from water vapor needed for dry soils. …

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