Black Mould in Bathroom
Dark mould growing on ceiling, walls, grout, sealant, or around the window in the bathroom.
What Is Causing This?
- 1Poor ventilation allowing moisture to linger
- 2No extractor fan or an ineffective one
- 3Cold surfaces creating condensation points
How Urgent Is This?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
What Needs to Be Done
A professional cleaner will treat the mould with specialist anti-fungal products and deep-clean all affected surfaces. Improving ventilation is essential to prevent return.
How Much Will It Cost?
National average estimate
Labour: £97 – £240 | Materials: £14 – £39
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionHow to Prevent This
Run the extractor fan during and after showers. Open windows when possible. Wipe down wet surfaces. Address any ventilation issues.
Related Problems
Black or dark green spots spreading across the bathroom ceiling, sometimes extending down the walls.
Grout between tiles turning dark grey, black, or developing visible mould spots, especially in wet areas.
White, chalky deposits building up on taps, shower screens, tiles, and around plug holes.
Other Cleaner Problems
White, chalky deposits building up on taps, shower screens, tiles, and around plug holes.
Sticky grease film on kitchen surfaces, extractor hood, tiles, and cupboard doors near the cooker.
Persistent stains on carpets from spills, pet accidents, or tracked-in dirt that domestic cleaning cannot shift.
Cloudy white marks and streaks on glass shower screens, mirrors, or windows from dried water droplets.