How to patch plaster

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How to patch plaster

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Project Overview

Learn how to patch a hole in a hard plaster wall. We’ll show you how to prepare the area, patch it up, and apply sealer so that the wall is ready to paint.
Continue to step-by-step instructions

Step by Step Instructions

1 Prepare the area
2 Apply the topping compound
3 Sand back the topping compound
4 Seal the patch
  • Step 1. Prepare the area

    In this example the hole hasn’t gone back to brick so we can patch the white set with some topping compound. If it did go all the way back to brick we would need to put a cement mix in there, let that dry, then cover it over with the topping compound. To prepare the area rough up the surface using a sanding block and remove any excess dust with a paintbrush.

  • Step 2. Apply the topping compound

    Mix up the topping compound until it is like thick toothpaste. Apply it to the wall using the hawk and spatula. Put it on thickly to fill the hole, then scrape it back. 

  • Step 3. Sand back the topping compound

    Once the topping compound is dry, sand back the area, in a circular motion, until it is smooth, even and ready for painting.

  • Step 4. Seal the patch

    Use a paintbrush to cover the patch with a sealer. Make sure you wear a respirator mask. Let the sealer dry. The wall is ready for a coat of paint.

Tools and Materials

Tools

  • Plasterers hawk
  • Safety gear
  • Sanding block
  • Spatula

Materials

  • Sealer
  • Topping compound
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