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How to Repair a Hole in a Plaster Wall: Part 1

A few weeks ago, Rory was called to a circa 1900 home to repair a hole in a plaster wall. The hole was formed when a careless electrician used a sawzall to cut a space for a light switch. The vibration of the saw caused damage, resulting in an approximately 12″ diameter hole that needed to be stabilized and filled in with new plaster.

First, Rory used screws and a screw gun to repair the “floating” lath behind the light switch, attaching the unstable pieces to studs and other lath. Then, using a 3/16″ masonry bit, Rory drilled holes into the unstable plaster about 1″ to 4″ around the edge of the hole. Next, he used Plaster Magic®adhesive to reattach the plaster to the lath behind it.

With the lath and plaster now stabilized, he was able to fill in the hole with a “scratch coat” of Plaster Magic®Patching Plaster. He then let it dry until it was ready for the second coat.

Here’s a video tutorial of the entire plaster repair and patching process. This is Part 1 of a 3-part process – be sure to watch Part 2 and Part 3.

Have more questions about repairs? Please feel free to leave them in the comments below or get in touch with us at