How To Fix Cracked Ceiling Plaster

Secure screws and washers diagonally on either side of loose plaster about 1 1 2 to 2 from the crack image 2.

How to fix cracked ceiling plaster. If it s a small hairline crack you won t have to worry. 3 dampen the patch. Score the crack with a utility knife to remove any loose plaster or other material that may be inside the crack.

This secures the existing plaster to the wood lath. Be sure to drive screws into wood lath above. Remove any loose plaster that s embedded in the crack.

Repairing large cracks in plaster 1 widen the crack with the can opener and dampen the edges of the crack with a sponge. Use trowel to spread joint compound onto ceiling covering the repaired area. How to fix cracks in plaster walls ceilings step 1.

Measure the length of the crack and cut strips of self adhesive mesh drywall tape to the correct length. We have successfully reattached many old ceilings by injecting adhesive between the plaster and lath where the keys anchors have broken away over time. Large cracks where the lath and plaster have been pulled away from the wall can be re secured using metal plaster washers and ordinary 1 1 2 or 2 drywall screws image 1.

Allow joint compound to dry at least 24. This will allow the mud to bond directly to the plaster which will make the repair. Fill the injection screw holes.

2 fill the crack half full with patching plaster. Using a nail score the plaster. To repair a crack in a ceiling.