Water-sensitive substrates such as plywood, plaster and plasterboard can be protected from damage by any water that penetrates the tiling layer, by the application of a surface waterproofing layer, known as a tanking system. The most likely places for leaks are in internal corners and around pipes, plugholes, trim etc, so these areas must be treated with care. Once weber.sys protect has been applied and your wet room is completely water-proofed use weber.set plus adhesive to tile your walls. weber.set plus is specially formatted to allow the fixing of large format ceramic, porcelain and natural stone tiles without vertical slip. Finally grout using weber.joint wall with Mould Stop Technology. Tile Grouts, Tile Adhesives, Flexible tile grouts, Tiling Products.