Final answer:
The nailing/screw pattern for backer board varies according to the manufacturer's specifications, typically involving fastening at 3/4 inch from edges and every 6 inches throughout the board.
Step-by-step explanation:
The nailing/screw pattern for backer board is according to the manufacturer's specifications. Different manufacturers may have different recommendations for the pattern, so it's important to consult the installation instructions provided by the manufacturer.
Typically, backer board should be fastened approximately 3/4 inch from the edges and then at regular intervals of about 6 inches throughout the board. This ensures proper stability and support for the backer board.
In some cases, the manufacturer may specify a different nailing/screw pattern based on the specific characteristics of the backer board or the installation requirements. It's important to follow the manufacturer's instructions to ensure a successful installation.