Johns Manville has been a trusted name with insulation for years, and their backer boards are built to last. The GoBoards are waterproof, ultra-lightweight, engineered for durability, and up to 80% lighter than cement boards. Pro and DIYers can easily accomplish tile installations of walls, showers, and ceilings. Start your project by easily cutting with a standard utility knife and finish projects faster with the GoBoard Tile Backer collection by Johns Manville.