Grout Removal With an Angle Grinder

Written by kevin mcdermott
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When the grout on your tile wall or floor starts to crumble and crack, you should extract the grout and re-grout the area, so moisture doesn't seep into the underlayment behind the tiles and cause bigger problems. Getting the old grout out is the hardest part. If there's a small amount of it, you can use a hand grout saw, but for bigger areas, a better solution is a grout-extraction disk, which can fit onto your angle grinder.

Skill level:

Things you need

  • Household cleanser
  • Sponge
  • Small angle grinder with grout-extraction disk
  • Vacuum hose

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  1. 1

    Clean the tile surface, including the grout lines, with household cleanser and a sponge, so the grout-extraction process doesn't grind dirt into the edges of the tiles.

  2. 2

    Set up your angle grinder with its grout-extraction disk.

  3. 3

    Hold the angle grinder so the disk is sitting on the grout line, at one end, facing in the direction of the line.

  4. 4

    Turn on the angle grinder. Gripping the tool with both hands, dig down into the grout while pushing the disk forward along the line. Keep the disk sunk about 3/8 inch down into the grout, so it's at the bottom of the grout but not digging into the material behind it.

  5. 5

    Continue moving the disk forward, digging out the grout and taking care not to damage the surrounding tile. Do the whole line, end to end.

  6. 6

    Vacuum up the pulverised grout from inside and around the line. Repeat for each line of grout. The lines are now ready for re-grouting.

Tips and warnings

  • Wear eye protection while extracting the grout.

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