How to Build a Drywall Arch

How to Build a Drywall Arch

Converting a plain doorway into a curved arch is a relatively straightforward project that requires some carpentry and drywall taping skills. You’ll need to frame a curved arch, bend and fasten a strip of drywall to the curved framing, and then install a flexible corner bead. None of these steps are difficult, but it’s fussy work.

Cut into Drywall and Make Template

First cut away the drywall inside the opening to expose the framing. Don’t worry if you break it back a few inches on the walls. Next determine the style and size of the arch (half circle, partial circle or ellipse) and make a pattern out of cardboard. Tape this up in the opening to make sure it looks OK and leaves enough headroom.

Use this template to mark out and cut two 1/2-in.-thick plywood arches. Next cut a 6-ft. 2×4 down to 2-1/2 in. wide (or 2 in. narrower than the total wall thickness).Cut one top block and two side blocks and nail them to the door framing. Center them so that the 1/2-in. plywood arches will sit flush with the existing framing. Now nail the arched plywood into place on both sides.

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