USG Corp. has unveiled its new Durock Shower System, a fully bonded, waterproof system for tiled shower installations. The system includes pre-sloped foam shower trays, a thin, durable waterproofing membrane, and a drain assembly that accepts all Durock Shower System 4” or 5” grates, the company noted. USG offers more than 50 grate options in up to 10 finishes.