Repair Plaster Walls Over Concrete

Fill the crack with patching plaster.

Repair plaster walls over concrete.

Plaster used on concrete tends not to last as long and is susceptible to crumbling chipping and damage. Over time the plaster separates from the lath creating structural cracks. Plaster is also prone to thinner spider web cracks which occur when. Use a cold chisel and and ball pein hammer to chip away the damaged plaster and us a scraper to scrape away excess debris.

Repairing this type of plaster is simple and can be completed by the average homeowner in just one weekend. As a result many older homes and some new homes have plaster walls. Teaching the world how to plaster one video at a time. If the crack is over 1 4 inch wide place a piece of fiberglass tape over the crack and patching plaster.

While plaster is best applied over wooden strips the material can also be applied directly to plywood sheets or concrete. This old house general contractor tom silva shows a newer faster way to fix cracked loose plaster walls. Learn how to clean the wall hole and how to repair it with plaster using the patch pla. Your walls should be free of paint oil and dust so the plaster can bond properly.

Allow the patching plaster to dry. Old lath and plaster walls are prone to cracking. Caulk cracks and kill any mold on the walls. Before you begin to plaster your concrete walls you need to remove peeling paint and flaking bits of old plaster.

The first step is to prep the area by removing any loose or flaking plaster. Take care not to hit too hard with the hammer as it could damage the wood lath behind the plaster. Use a wire brush to clean stains left by the mold or mortar joints. The texture of the concrete walls should be sufficiently rough so the plaster will adhere to it.

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