How To Repair Plaster Walls Around Windows. Plaster walls will eventually develop cracks. How to patch plaster walls if the lath is good condition.
A professional painter should be able to repair minor.
The fix takes a few days. It will get on the walls around the holes, you can wipe it off with a lightly dampened towel. To avoid cracking the plaster and creating an even bigger repair job, don't pull the plaster tight to the lath in a single motion. Plaster repairs are an occasional requirement if you own an old home.