Jan They can follow structural members in a straight line or run diagonally across the wall surface. Patching cracked walls is a skill that falls. Step 1: Remove Damaged Plaster. While it may be tempting to rip down an old plaster -over-lath wall and replace it with drywall, often the plaster can be saved.
Firm plaster that has popped off lath.
Use a flat trowel to apply plaster base coat over the exposed. The trick to patching plaster is to start with small holes that are no bigger than two inches in diameter. If the hole is deeper than one-half inch, then only fill the hole. Craig Phillips shows you how to patch plaster repair a hole in a wall.
Learn how to clean the wall hole and. This Old House general contractor Tom Silva shows a newer, faster way to fix cracke loose plaster walls.