Designed for attaching fiber cement board such as HardieBacker®* to wood or light gauge steel framing. Backer-On Screws provide the optimal fastening solution for installing fiber cement board to wood or steel framing. Backer-On Cement Board Screws conform to ANSI A108.11 Standards for cement board installation.
Fasten cement board with Backer-On/Rock-On screws every 8 in. over the entire surface. Keep screws between 3/8 in. and 3/4 in from board edges and 2 in. from board corners.
Floor Installation - 48 Screws/Board
Fasten cement board with Backer-On/Rock-On screws every 8 in. over the entire surface. Keep screws between 3/8 in. and 3/4 in from board edges and 2 in. from board corners.
Wall Installation - 26 Screws/Board
Fasten cement board with Backer-On/Rock-On scews a maximum of 8 in. on center at all supports. Keep fasteners 3/8 in. from board edges and 2 in. from sheet corners.
Ceiling Installation - 30 Screws/Board
Fasten cement board with Backer-On/Rock-On scews a maximum of 6 in. on center at all supports. Keep fasteners 3/8 in. from board edges and 2 in. from sheet corners.