How To Patch Plaster Walls. The outer plaster and the inner wooden or metal lath. Plaster walls, by contrast, are constructed of two layers:
You want something with some flex.
Learn how to fix holes (5 steps) or cracks (3 steps) in plaster walls or ceilings as well as how to repair lath behind a hole (3 steps) using our diy guide. Plaster walls develop small cracks as the house settles or because of age. This is one of those home maintenance jobs that will keep your home looking as fresh as the day it was decorated you can end up with a wall that looks like its been peppered with bullets. The most common problem with plaster walls is crumbling, water the patch is be cut out to a square or rectangular shape at position where repairing is needed.