Lightweight Waterproof Tile Substrate GoBoard® Tile Backer Board is a lightweight, waterproof tile substrate designed for interior tile installations on floors, walls, ceilings, showers, tub surrounds, and countertops. Its waterproof foam core eliminates the need to waterproof the entire panel, requiring sealing only at board joints and fastener penetrations to create a waterproof assembly. Fast Utility Knife Installation Unlike traditional cement backer board, GoBoard cuts by scoring and snapping with a utility knife, producing clean cuts without excessive dust or crumbling. The lightweight construction, up to 80% lighter than cement backer board, makes handling, carrying, and installation easier on residential and commercial projects. Compatible with Common Tile Installations GoBoard is compatible with ceramic, porcelain, natural stone, and mosaic tile installations in interior applications. It installs using GoBoard fasteners and washers and is suitable for new construction, remodels, showers, bathrooms, kitchens, and other tiled environments requiring a waterproof tile substrate.