How to avoid mouldy grout

Mould has a habit of appearing in bathrooms and kitchens where moisture, warmth and limited airflow create the perfect conditions for it to grow - and it can also affect the air quality in your home. The good news is that a few simple habits can help keep it under control.

August 3, 2026

Keep the air moving

Mould loves damp, still spaces, so good ventilation is one of the best ways to help prevent it.

  • After a shower, leave the bathroom door or shower screen open where possible to help moisture escape. If your bathroom has an exhaust fan, switch it on while showering and leave it running for a little while afterwards.
  • In the kitchen, turn on the rangehood or exhaust fan when cooking, and open a window if steam starts building up. Letting that moisture out early can help stop it settling on walls, tiles and grout.

Dry wet areas quickly

The less moisture that hangs around, the less chance mould has to settle in.

  • After showering, use a squeegee or dry cloth to remove excess water from shower walls and tiles. It only takes a minute and can make a big difference over time.
  • Don't forget about towels, either. Damp towels left in a humid bathroom can add extra moisture to the room, so hang them outside to dry when possible or give them a quick spin in the dryer.

Give tiles and grout regular attention

Soap residue, body oils and everyday grime can build up on bathroom tiles and grout, creating a surface where mould can become established.

  • Regular cleaning with warm water and a suitable tile cleaner can help keep surfaces looking fresh. Pay particular attention to grout lines, corners and areas that stay damp for longer.
  • The key is not waiting until mould has taken hold - a quick clean as part of your regular routine is much easier than tackling a bigger build-up later.

Deal with mould early

If you spot small patches of mould, clean them as soon as possible before they have a chance to spread. Always follow the instructions on any cleaning products you use and make sure the area is well ventilated while cleaning.

Consider professional cleaning

Sometimes grout needs more than a regular wipe-down, especially in areas that are constantly exposed to moisture. A professional tile and grout clean can remove built-up grime, refresh tired-looking surfaces and help keep your bathroom or kitchen looking its best.

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