How to Install Drywall at an Angle

Install drywall on the walls first. This runs counter to the normal method, which requires installing drywall on the ceiling first. Ensure that the top sheet of drywall on the walls are level with the top of the ceiling plate. The ceiling plate is the horizontal board that attaches to the top of the wall studs.

Measure the joists for the first panel--from the side to the middle of the joist that is just short of the length of your drywall panel. Drywall panels must "break" on the center of the joists, meaning the edge of every panel must extend to the middle of a joist.

Cut the end of the drywall panel with a utility knife, if necessary, to fit the measurement. You might not have to cut the panels until you reach the edge of the ceiling because joists are often spaced at increments that correspond with the length of the panels.

Fit the tilting lift with the drywall panel and raise the panel to the angled ceiling, maneuvering the lift until the panel is in place. The bottom edge of the angled panel should rest on top of the previously installed wall panel.

Install drywall screws to secure the panel, with about one screw every 8 inches. Make sure that every screw goes through the drywall panel and into a joist. The perimeter screws should be 1/2-inch from the edge of the panel. Screws on the interior of the panel should be in the center of each joist.

Measure, cut and fit subsequent drywall panels the same way, installing the bottom horizontal row first, and then the next row up. When you reach the top of the angled ceiling, you most likely will have to cut the panels lengthwise to fit. Finish one side of an angled ceiling before starting on the opposite side, if applicable.