Someone clearing condensation from windows

Preventing condensation

Condensation is the most common cause of damp and mould. It can affect any property, old or new.

Every home gets condensation at some time – usually when lots of moisture and steam are being produced, such as bath times, when cooking meals or washing clothes. Fish tanks and indoor plants can also create large quantities of moisture in the air.

It is quite normal to find your bedroom windows misted up in the morning after a cold night. This does not mean there is a serious condensation problem.

What is condensation and what causes it

Cooking, washing, bathing and even breathing cause moisture which is released into the air. The air can only hold so much water vapour – the warmer it is, the more it can hold. When cooled by contact with a cold surface such as a mirror, window or wall, the water vapour turns into droplets of water – condensation.

Condensation usually occurs during the colder months - October to April - when we ventilate our homes less as our windows and doors are kept closed against the cold. This can cause:

  • Water droplets on cold surfaces like windows and painted walls
  • Slightly damp wallpaper
  • Development of mould, especially black mould

Condensation can occur well away from water sources in the kitchen and bathroom. It can also affect wooden roof and floor joists which can lead to dry or wet rot developing.

Reducing condensation

Improving ventilation and producing less moisture will help reduce condensation and any mould growth in your home.

Reduce condensation by:

  • Drying your washing outside whenever you can. You can also hang it in the bathroom but keep the door closed and the window open.
  • Ensuring your tumble drier is vented to the outside of your home.
  • Covering pans when cooking and not leave the kettle boiling.
  • Ventilate bathrooms and kitchens – when in use, keep the window open and use the extractor fan where applicable. Keeping the door closed also helps.
  • Keeping window trickle vents open at all times where applicable.
  • Reducing rapid changes in temperature - set your heating to a low-level background heat to keep walls from getting cold.

Damp and mould

You are responsible for damp and mould treatment in your home. To help you should:

  • Wipe down windows with a fungicidal wash.
  • Shampoo mouldy carpets.
  • Treat and remove the damp / mould on the walls – there are various products available to buy in DIY stores. Where possible remove lining paper and wallpaper so you can also treat the plaster before wallpapering or redecorating with a fungicidal paint.

If you have fungus in wet areas try improving ventilation, use diluted bleach or sodium bicarbonate solution to clean the affected area.

We may visit your home to take a look if you keep on having problems. Please Contact us

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