- 1). Spread a drop cloth over the room to keep your furniture and floor clean. If you are removing a drywall ceiling, you will release plaster dust. Put on breathing protection to prevent breathing in the dust.
- 2). Slice away the portion of the ceiling that is infected with mold. Use a handsaw to remove portions of the drywall ceiling. Measure the dimensions of the hole.
- 3). Cut a strip of 1-by-1 board into four lengths that are 4 inches longer than the hole. Insert these wooden pieces into the hole and rest them so that they overlap the hole in each direction by 2 inches.
- 4). Screw drywall screws through the drywall and into the wood pieces using a cordless drill with a Phillips-head bit. Use eight screws total, one screw on each side of each piece of wood.
- 5). Cut a piece of drywall with a utility knife so that it fits snugly into the hole. Place the drywall piece into the hole and attach it to the wood using four drywall screws.
- 6). Cover the seams between the drywall piece and the rest of the drywall with drywall tape. Then cover the tape and the screws with spackling paste using a 4-inch drywall knife.
- 7). Coat the new drywall with ceiling plaster, using the drywall knife. Texture the plaster so that it blends with the rest of your ceiling. For example, if your ceiling is popcorn, mix rigid plastic foam pieces into the plaster and apply the plaster to the ceiling.
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