Fogged windows, wet tiles and black speckles above the kitchen window usually follow a meal, not a leak. Here is where the steam goes and how to stop it, cheapest step first.
Cooking is one of the everyday sources of moisture in a home, and the steam settles on cold windows, tiles and external walls. Fix it in order: lids on pans, the kitchen door shut, the extractor or cooker hood on from the start, and a window open a little. The Property Care Association, GOV.UK and the Centre for Sustainable Energy give the same steps. A dehumidifier is the last rung, not the first.
Misted kitchen windows after a meal, droplets on the tiles, a wall cupboard that feels cold and damp, or black speckles in the corner above the window. The Property Care Association lists cooking, showers, baths, drying clothes and even breathing as normal sources of the moisture in the air that becomes condensation, and says kitchens and bathrooms are typically where it shows first.
The pattern is the clue. Cooking condensation appears while you cook and fades once the room has aired. If the same patch is wet whatever you cook, or gets worse after rain, look for a leak or penetrating damp instead. Our guides to a hidden plumbing leak and rising, penetrating and condensation damp help you tell them apart.
Work down the list in order. The first three steps cost nothing.
We have no Ashford-specific measurements of kitchen moisture and we will not invent any. What matters is the layout of your own home. If the kitchen has a door you can close, use it, because that keeps the steam out of the cooler bedrooms upstairs. If it is an open-plan kitchen-diner, or opens straight onto the stairs, closing the door is not an option, so the extractor, the lids and the open window do more of the work and the steam will travel further if you skip them. Check which kind of kitchen you have before you decide what to change.
A dehumidifier does not fix a leaking pipe, a dripping waste under the sink or water getting in through the wall, and mould already on the wall must be cleaned off. It does not replace an extractor fan or a hood that is not working. It is also not suitable for rental properties unless the landlord authorises the changes, and it needs a loft to mount the unit.
Once the lids, the door and the fan are sorted and the kitchen still feeds a damp-prone home, a Dryzen system may be worth a look. It is a loft-mounted dehumidifier with insulated ductwork to the central area or stairway. Each unit covers 150 square metres, extracts 12 litres a day and uses about 20 pounds a year in energy. It helps stop the conditions mould and dust mites need, and the app lets you monitor temperature and humidity. A free survey will tell you honestly whether it would help.
Yes, if you can. GOV.UK guidance, the Property Care Association and the Centre for Sustainable Energy all suggest keeping the kitchen door closed while cooking so the steam does not drift into cooler rooms and condense there. Open a window or run the extractor at the same time so the steam has somewhere to go.
The Property Care Association explains that condensation is more noticeable in winter because the outside air is colder, which leaves external walls and windows cold. Warm, steamy kitchen air meets those cold surfaces and turns back into water.
No. Removing steam at source with lids, a working fan and an open window comes first. A dehumidifier helps lower the humidity that is left, but it does not replace extraction in the kitchen, and it is the last rung of the ladder, not the first.
Sources: Property Care Association: Condensation; Property Care Association: Condensation solutions; Property Care Association: Ventilation and condensation; Centre for Sustainable Energy: Condensation, damp and mould; GOV.UK: Understanding and addressing the health risks of damp and mould in the home
Last reviewed 2026-10-27. General guidance only; this is not a survey of your home.