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Specifying Ceramic, Glass, and Stone Tiles for Exterior and Interior WET AREAS Understanding the importance of slope, weeps, and flashing by Donato Pompo, CTC, CSI, CDT, MBA All photos courtesy Ceramic Tile and Stone Consultants EXTERIOR DECKS AND BALCONIES, AND INTERIOR SHOWERS AND BATHROOMS, HAVE HISTORICALLY BEEN PROBLEMATIC AREAS FOR THE INSTALLATION OF CERAMIC, GLASS, AND STONE TILES. TYPICALLY, PROBLEMS ARE DUE TO INSTALLER ERROR, NOT USING APPROPRIATE MATERIALS, OR NOT PROVIDING CLEAR ENOUGH SPECIFICATIONS. IN EACH CASE, IT IS THE RESULT OF NOT FOLLOWING INDUSTRY STANDARDS. These standards are created by industry consensus groups through organizations such as American National Standards Institute (ANSI), Tile Council of North America (TCNA), ASTM International, or International Code Council (ICC). These groups combine their many years of experience and science to establish standards so problems and failures can be avoided and not repeated. If the standards are not followed, then known potential problems cannot be circumvented. In the last decade or so, since the demand and use of tile and natural stone has dramatically grown, there have been a lot more failures caused by those materials being subjected to excessive moisture. Obviously, tile and stone are resistant to problems as indicated by the many installations still functional after thousands of years of use and exposure to various weathering conditions. However, when things are done incorrectly in a tile and stone installation, particularly where water is involved, it can lead to aesthetic failures and substantial collateral damage of adjacent materials, significantly reducing the application’s life. 10 the construction specifier | may 2013 CS_May2013.indd 10 4/16/13 3:30:33 PM