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Window mould is a common problem in UK homes – especially during the colder months when condensation builds up on glass and frames. While it may seem like just an unsightly nuisance, mould can actually cause damage to your home and negatively affect your health.
But don’t worry – removing window mould and preventing its return is simpler than you might think. Here’s your step-by-step guide to banishing it for good.
What Causes Mould Around Windows?
Mould around windows is usually caused by excess moisture. The main culprits are:
- Condensation: Common in winter when warm indoor air meets cold window surfaces.
- Poor ventilation: Bathrooms, kitchens, and bedrooms often suffer due to trapped moisture.
- Leaking windows: Damaged seals or frames can let rainwater seep in.
Mould tends to form on window sills, seals, and even curtains or blinds if left unchecked.
How to Remove Mould from Windows
What You’ll Need:
- Rubber gloves
- Mask (to avoid breathing in spores)
- Soft cloths or disposable paper towels
- White vinegar, baking soda, or a commercial mould remover
- Old toothbrush or small brush
- A bucket of warm, soapy water
Step-by-Step Cleaning Method:
1. Open the window
Ventilate the area well while you clean, especially if using commercial products.
2. Spray the affected area
Use either:
- A 50/50 mix of white vinegar and water
- A commercial mould remover (available at most UK supermarkets and DIY stores)
Let it sit for 10–15 minutes.
3. Scrub gently
Use a cloth or an old toothbrush to scrub the area clean. For stubborn spots, apply a paste of baking soda and water.
4. Rinse and wipe dry
Wipe the area with clean water and dry thoroughly with a fresh cloth.
5. Dispose of used materials
Bin paper towels and wash cloths at a high temperature. Never reuse sponges used to remove mould.
How to Prevent Window Mould in the Future
Mould loves damp, poorly ventilated environments – so prevention is key.
Improve ventilation
- Open windows regularly (especially after showers or cooking)
- Use extractor fans in bathrooms and kitchens
- Consider a dehumidifier for rooms prone to damp
Reduce condensation
- Wipe down windows each morning in colder months
- Keep trickle vents open
- Use thermal or double glazing where possible
- Avoid drying clothes indoors without ventilation
Insulate and seal
- Repair damaged window seals
- Consider secondary glazing for older homes
Final Thoughts
Window mould might seem like a minor issue, but left untreated it can lead to health risks and property damage. With a simple cleaning routine and a few preventative steps, you can keep your windows fresh, dry, and mould-free all year round.
