Keep bathroom mould free over winter with 5 different easy fixes

December 15, 2025
3,693 Views

It’s something almost every homeowner struggles with – mould in the bathroom.

But there’s certain things you can do to deter it from growing and spreading in your home – and it doesn’t require much work at all.

It comes after a fed-up homeowner said on Reddit: “You should know mould in the bathroom can be prevented entirely by keeping the bathroom door open during/after showering.”

They added: “If you’re renting a place with lacking ventilation, opening the bathroom door will generally prevent mould.

“Why you should know this – I am moving into a new apartment now, which again has a mouldy bathroom.

“I have lived in my current apartment mould free despite the previous renters claiming that the mould always returns. Both renters seemed completely clueless on mould.

“This advice only applies to the very common bathroom mould where the issue is generally high humidity. Other instances of mould can have a variety of causes that are potentially really difficult to fix.

“Also, don’t clean mould with soap. You will keep cleaning endlessly if you do that. Use a special mould cleaner or something similar (with a face mask and gloves as the stuff is nasty).”

Sharing their expert advice, the team at National Plastics explained how mould grows when moist air encounters a cool surface, such as a wall, window, or mirror, the moisture condenses into water droplets.

In our homes, this condensation can occur for several reasons including inadequate ventilation, missing insulation, and lack of or inadequate heating.

But thankfully, there’s a few easy fixes.

A statement reads: “Bathrooms create more moist air than any other room in your home, due to the daily use of showers, baths, and taps.

“Because of this, the chance of mould developing is high.” There are a few things you can do to minimise the risk:

  • Install ventilation in the form of a fan or vent to ensure moisture can leave the room
  • If you do not have sufficient ventilation, then always open a window while you are in the bath or shower to prevent excess moisture from building up
  • Try and dry towels outside if you can
  • Wipe away any excess moisture from surfaces to help prevent the creation of mould
  • Keep your bathroom warm to help reduce condensation through underfloor heating, heated towel rails, and radiators

Commenting on the Reddit, post, one user said: “Maintenance man here, for the love of god use your exhaust fan. Don’t make me bust my a** to peel all that caulk.”

Another user added: “We have an old house with no bathroom vent fan, but we do have a window in each bathroom.

“So far it’s one of maybe three houses I’ve seen with bathroom windows. If you have one, crack it open to let moisture escape.”

A third user said: “I live alone and never close my bathroom door to shower and yet mould is constantly appearing. This is despite times that I’m away from home for a month at a time.”

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