When installed without a well-defined drainage space, traditional masonry products have the potential to release additional moisture vapor inside the wall cavity which can contribute to structural damage and mold growth. In addition to being a mortar-less installation, CertainTeed STONEfaçade™ features the industry's only 3/8" steel fully-integrated rainscreen, providing additional structural support and ample moisture drainage from top to bottom for outstanding moisture management and protection of your most important investment.