I need to cut out a shape (rectangular opening) inside a cement board. Was wondering if it can be done with a jigsaw and a special blade once I have pilot holes drilled in each corner.
Cutting out shapes inside cement board
cuttingmasonrytools
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Best Answer
There is no real experience needed when cutting an opening in cement board. I've seen openings for faucet handles created with nothing more than a well placed hammer strike (one hit each hole!). What ever tool you have available will suffice. I've drilled perforations with a masonry bit for a single shower valve. Oscillating tools with a carbide blade work. The primitive method is to cut the mesh with a utility knife and then force the board to break along the cut line. For a triangle cut not along an edge, mark the outline with a pencil, and drill a 3/8 inch hole at each of the 3 points. With an aggressive saw blade follow the lines to each 3/8 inch hole. If the edges are to jagged smooth with a rasp or a whet stone.