Cutting backer board, especially if it's a gypsum-core backer board, is done with a razor knife. Score the surface with the razor and then snap the board, creating a clean line. Then use the razor to ...

Q DEAR TIM: I'm getting ready to buy backer board for a ceramic tile project. Which types would you use and which would you avoid? You've mentioned using cement backer board; do you still feel that's ...