How to Stop Condensation on Windows in Winter

Wet windows every morning? Why it happens and simple ways to reduce moisture and prevent mould.

Editorial TeamNovember 4, 20261 min read

Waking up to dripping windows is common in winter. Condensation forms when warm, moist air inside meets cold glass. Left alone, it can lead to mould and damp.

Where the moisture comes from

Everyday activities add a lot of water to the air: cooking, showers, drying clothes indoors and even breathing while you sleep.

10 ways to reduce condensation

Use extractor fans when cooking and showering.
Put lids on pans.
Dry clothes outside or in a vented dryer when possible.
Open windows a little for 10–15 minutes each morning.
Keep bedroom doors open slightly to let air circulate.
Keep furniture a few centimetres away from outside walls.
Heat your home steadily rather than in big bursts.
Use a dehumidifier in problem rooms.
Don't block trickle vents on windows.
Wipe windows dry every morning.

Quick habitKeep a window squeegee or microfibre cloth on the windowsill and wipe the glass each morning. Empty the water into the sink.

Spot mould early

Look for black spots around window frames, in corners and behind furniture. Clean small patches with a mould remover and keep the area dry.

When to get help

If condensation is severe, or you see damp patches on walls, there may be a ventilation or building problem. Speak to your landlord or a professional.