How to remove black mould from tile grout

Written by jamie christie
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How to remove black mould from tile grout
Remove black mould from the grout between tiles. (john shepherd/iStock/Getty Images)

Many of us have experienced an unwanted house guest -- black mould that makes itself at home in the grout between wall tiles. Though the stubborn moulds like to take up residence in damp places like your bathroom or kitchen, there are ways to remove it from hard to reach places.

Skill level:

Things you need

  • Gloves
  • Goggles
  • Water
  • Soap
  • Towels
  • Small bucket
  • Bleach
  • Old toothbrush

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  1. 1

    Wipe up any water or dampness in the affected area. Inspect the surrounding area for any plumbing leaks, as these are often the source of the mould problem.

  2. 2

    Dry the affected area thoroughly with a cloth.

  3. 3

    Put on the goggles, and if desired, secure a respirator securely over your nose. Take both of these precautions to protect yourself from airborne moulds and spores while cleaning.

  4. 4

    Scrub the affected area with a damp cloth with detergent. Wipe dry and assess your progress. If mould is still visible, try cleaning the area using soap and an old toothbrush, so that you can more closely control the area you are cleaning. Wipe dry.

  5. 5

    Mix a small amount of bleach with water in your bucket. Test this mixture on a small portion of tile and grout to make sure it does not discolour the tiles. If it does not cause discolouration, dampen your cloth and scrub again, with either the cloth or toothbrush. Once you have successfully removed the mould, it should not be visible on the tile or the grout, nor should the smell of mould be present.

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