Q. I have a rectangular hallway pass-through in my home that has no door. I’d like to change the top of the pass-through into an arch and finish with drywall, but how do I bend the drywall for the arch?
A. Remove the drywall above the pass-through from each side of the wall. Cut two replacement panels from 1/4in. plywood with matching curves at the bottom. Screw them above the pass-through, and add short cripple studs between the curved panels. You can then cover the plywood panels with 1/4 – or 3/8 in. drywall to match the adjacent walls. To finish the curved area between the two plywood panels, you have three options: (1) Use flexible drywall. (2) Create you own flexible drywall by scoring the back of 1/2 in. thick drywall ever 1/2 – or 1 in. (3) Or, for the look of wood trim on the curve, you can use bendable plywood.