CHICAGO, Sept. 3, 2013 /PRNewswire/ -- USG Corporation (NYSE: USG), a leading building products company, has introduced its new DUROCK Shower System, a fully-bonded waterproofing system for tiled shower installations designed to control moisture independently of the tile covering, while creating a solid base for a long-lasting shower. The system reduces installation time by featuring pre-sloped foam shower trays that install more quickly than conventional shower bases constructed of dry pack mortar; a thin, pliable, and extremely durable waterproofing membrane; and an easy-to-install drain assembly that accepts all DUROCK Shower System four-inch or five-inch grates. (Photo: http://photos.prnewswire.com/prnh/20130903/CG71849) "We are very proud to offer an affordable, higher quality system that will enable faster job turnover and higher profits for our customers," says Scott Crandall, business manager, Substrates and Specialty Division at USG. "We put an abundance of research and engineering into this system to ensure a best-in-class solution that outperforms the competition." Ideal for both new construction and repair or remodel projects, the DUROCK Shower System is more adaptable to job-site conditions, is barrier-free friendly, and offers significantly more grate options and superior grate finishes − allowing homeowners to choose a style that fits their bathroom aesthetic. The pre-sloped shower tray has a two percent slope, which allows for easy installation of a wide variety of tile shapes and sizes and provides a more comfortable feel for the homeowner. Molded from three pound density expanded polystyrene (EPS), it comes in three sizes: 48" x 48" center drain, 32" x 60" center drain, and 32" x 60" offset drain. The system's waterproofing membrane features an oriented high-density polyethylene, cross-laminated core that provides strength and tear resistance at much thinner mil thicknesses (0.12 mil), making it the most pliable, user-friendly membrane in the industry, with the least amount of buildup at seams. And because it has the lowest perm rating of any load-bearing, bonded waterproofing membrane on the market when tested to ASTM E96 Procedure E (<0.075), it is ideal not only for showers and other wet areas, but for continuous-use residential and commercial steam showers. The USG DUROCK Shower System waterproofing membrane is one of the strongest, most tear-resistant membranes on the market.