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How Do You Repair A Hole In A Plasterboard Made by a 40mm Hole Saw?

I have a slightly different approach than the other answers given. It’s quite simple. Just remove the disc from the saw. Attach a Starbucks wood pin to the plasterboard hole’s back. Also, you can use masking tape and then use cement to repair the hole.

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You can do it another way. The only materials needed are putty and 5-5 pieces of plaster. You will need a spatula and a 40 mm saw.

  • Use a 5-inch drywall drill at the back with a hole saw. Turn most of the time, but not always without stirring the forward paper.
  • Remove the plasterboard, leaving the blanking plug and 40mm outer paper intact.
  • Apply a drop of sealant throughout the plug using a spatula.
  • Press a putty knife into the hole to clean the patch and exclude excess sealant.
  • Allow to sand, dry, coat, prime. 

People call this technique the California patch. The advantage of this technique is fast and lightweight. You don’t need to have fun. There is no need for a cassette; the front paper will take care of that.

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Two other ways:

  1. Cut the plasterboard’s piece or rectangular plaster with a pin in the core to hang it. Apply a little glue, push it through the hole with a screw and set it so that it covers the back of the drywall. It won’t completely cover the hole, but it will give you a solid base to fill. Use drywall cement to fill the hole and scrub the surface when dry lightly.
  2. Also, cut a part of the plasterboard to the diameter of the hole. Cut off the side of the cork and some plaster throughout the diameter. Press down on the protective tape to hold it in place until it dries. Apply a few more cement to the cork without tape and smooth with a spatula. Once dry, wipe the smooth surface: priming and painting.
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