How do you fix a crack in plaster ceiling? Steps for patching a plaster and lathe ceiling : When originally installe wood lathe was nailed to the ceiling joists. Plaster mixed with horsehair or goat hair was then forced onto the lathe, forming a key that holds it to the lathe. One option is to cut out the damaged area and install a 3⁄8” thick sheet of blue board and plaster. Not Patching If you have a small crack in the plaster on your ceiling , you can get away with filling it rather than patching it.
However, the crack should be no more than ¼-inch wide and there should be no discoloration on the plaster. If the plaster is discolore you’ll need to remove an area and patch it properly. How to Repair Wall Plaster 1. You’ll want to put a canvas drop cloth or an old blanket down on the floor to prevent any.
First, make sure there are no nails or screws in the area you are going to repair. Prepare The Patch Area. Apply Plaster Sealant. Using a nail, score the plaster.
Fill the crack half full with patching plaster. When it has dried a little, score the plaster with a nail, as shown at. The moisture from the shower had penetrated into the plaster enough to weaken the bond between the finish layer and the base plaster.
The traditional plaster ceiling repair method is to mix up some plaster , or drywall compoun or use spackling compound to fill in the crack.