Repairing Plasterboard Ceiling

To repair large sags follow these steps.

Repairing plasterboard ceiling. Start by cleaning loose material out of the crack and fill it with joint compound. Sand away high spots and ridges with 100 grit sandpaper. Downstairs you ll have to prod the ceiling with an awl or lift the floorboards in the room above.

Add wooden cleats behind each side for support. Fill low spots with joint compound. From a piece of scrap drywall cut a patch that completely covers the hole in the wall.

Using a nail score the plaster. Repairing large cracks in plaster 1 widen the crack with the can opener and dampen the edges of the crack with a sponge. Step 2 condition the lath.

Cut a rectangle around the damaged area. In this step by step drywall repair video tutorial i ll be showing you how to repair a drywall ceiling ho. It is possible to fix plasterboard over an existing ceiling but you ll need to determine where the joists are first.

Save yourself time and trouble. For upstairs rooms this can be done by measuring the joist gaps in the loft. Install drywall screws and plaster washers around the perimeter of the loose area.

Clean with a damp rag to. Then simply cut new board to fit. Stained cracks and suspicious shadows the telltale signs of a delaminating plaster ceiling.