How to Cut Drywall Around a Vaulted Ceiling

Measure the area of vaulted ceiling you want to cover. Your drywall edge must finish halfway across a rafter to allow for a nailing surface for the next sheet using the same rafter.

Transfer your measurements to your drywall. Openings need to be measured, drawn and cut for light fixtures and other obstacles. Carefully measure and draw your cut lines for this purpose.

Place a drywall straightedge along the side of the drywall that is perpendicular to your cut. Drag a utility knife along the edge of the straightedge to cut through the top paper covering the drywall. Set down the knife and straightedge. Press the drywall away from the cut. The drywall is a composite board made of compressed powder. It will snap cleanly along the cut. Take the utility knife around to the other side of the drywall. Keep the drywall bent along your cut. Drag the knife down the bent crease to cut the paper.

Cut around obstacles and outlets using a drywall saw or drywall router. Other saws are also used. For round holes, use a hole saw attached to a drill. Keep your cuts as clean and tight as possible. Lift your cut panel to the ceiling. Position the panel properly and screw the panel to the rafters using drywall screws and a screwdriver every 12 inches. Stagger your joints so that they do not line up.