How to cut a brick wall opening

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How to cut a brick wall opening

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Project Overview

If you are planning to install a new window, door or access panel into a brick wall, you’ll need to cut a new opening in the bricks. We can show you how to cut into brick using an angle grinder. You’ll also learn the best tools to use, how to measure and mark up, and the best way to knock the bricks out safely.

Continue to step-by-step instructions

Step by Step Instructions

1 Before you start cutting into the brick wall, install a lintel
2 Cut the opening in the wall
3 Loosen the mortar between the bricks
4 Knock the bricks out of the wall
  • Step 1. Before you start cutting into the brick wall, install a lintel

    Before cutting an opening in a brick wall, you need to install a steel lintel above where you want the hole. This will ensure that the wall remains properly supported and won’t collapse under its own weight. Check out our How to Install a Lintel video to find out more. Once the lintel is installed, mark out your vertical cutting lines with a spirit level.
  • Step 2. Cut the opening in the wall

    Use an angle grinder to cut the straight vertical lines into the wall. A lot of brick dust will be kicked up, so wear a dust mask, safety glasses and earmuffs. Remember, you get a much cleaner cut if you don’t push too hard on the angle grinder and just let the tool do the work.
  • Step 3. Loosen the mortar between the bricks

    Use a hammer drill and masonry bit to drill holes in the mortar between the bricks you want to remove. Mortar is a lot softer than brick so you can do this quite quickly. It makes it easier to knock the bricks out of the wall, rather than having to use excessive force.
  • Step 4. Knock the bricks out of the wall

    Use the mash hammer and brick bolster to remove the bricks from the opening. Hit carefully near the edges of the opening to preserve the clean edges of the bricks. You should also be careful when removing the top bricks so that you don’t disturb the lintel.
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