Kitchen design
Kitchen Condensation and Mould in Winter: How to Stop It
Streaming windows are a warning sign. Why kitchens get condensation in winter, the habits that cut it, and when mould is a health risk.
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Cooking, boiling the kettle and drying clothes all put water into the air. In winter, that moisture meets cold windows and walls and turns into condensation, and left unchecked it leads to black mould.
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Why it happens
Government guidance on damp and mould notes that everyday tasks such as cooking, bathing, washing and drying laundry all add moisture to the air, and it builds up if it cannot escape. Kitchens produce a lot of it, so they are often the first room to show condensation.
Habits that help
| Habit | Why |
|---|---|
| Use the cooker hood or extractor whenever you cook, and leave it on for a while afterwards | Removes steam at the source |
| Cook with lids on pans | Less steam escapes |
| Keep the kitchen door shut while cooking | Stops steam spreading to colder rooms |
| Open a window wide for a short time after cooking | Quick air change without cooling the walls |
| Dry clothes outside or in a vented dryer | Wet washing releases litres of water |
| Keep the home steadily heated | Warm surfaces get less condensation |
Dealing with mould
Wipe small patches of surface mould promptly. If mould keeps coming back, spreads, or there is damp in the walls, the cause may be structural or a ventilation problem. The guidance stresses that damp and mould are a health risk, especially for children, older people and people with health conditions or weakened immune systems. Tenants should report it to their landlord.
An effective extractor is the best single fix: see our cooker hood guide.
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Frequently asked questions
Why do my kitchen windows steam up?
Cooking and kettles release moisture, which condenses on the cold glass. Use the extractor, keep lids on pans and open a window briefly after cooking.
Is black mould in the kitchen dangerous?
Damp and mould can harm health, especially for children, older people and anyone with a health condition or weakened immune system. Deal with the cause, not just the stain.
Does a recirculating cooker hood help with condensation?
Not much: it filters grease and smells but returns the moisture to the room. A hood that extracts outside removes the steam.
Sources
- Understanding and addressing the health risks of damp and mould in the home, GOV.UK (DLUHC and UKHSA), 7 September 2023. Checked 6 October 2026.