Richmondshire District Council

Condensation starts as moisture that is produced by cooking, taking a bath, having a shower or drying clothes indoors. The moist air can condense in unheated bedrooms, bathrooms or other rooms on cold walls, ceilings or floors and then forms mould.


How to avoid condensation

Produce less moisture by:

  • Covering pans when cooking and not leaving kettles boiling
  • Not using portable bottle gas heaters: the gas produces a lot of moisture
  • Drying washing outdoors on a line, or use well-ventilated rooms
  • Venting any tumble driers on the outside, unless it is the self-condensing type
  • Wiping down surfaces where moisture settles to prevent mould forming

 
Ventilate rooms to remove moisture by:

  • Keeping bathrooms and kitchen doors closed when using these rooms and opening a window so that steam can escape, or use the extractor fan if one is fitted
  • Opening windows in each room for a while each day to allow a change of air
  • Not blocking permanent ventilators
  • Leaving a space between the back of the wardrobe and the wall to allow air circulation around your wardrobe. Where possible, position wardrobes and furniture against internal walls


Keep your home warm. In cold weather, keep low background heating on all day, or as much as possible. And take steps to reduce heat loss.


First steps against mould

You should:

  • Treat any mould you may already have in your home. If you deal with the basic problems of condensation, mould should not reappear
  • Kill and remove mould, wipe down affected areas with fungicidal wash, available from DIY stores. Follow the manufacturer's instructions
  • Redecorate using a good-quality fungicidal paint to help prevent mould recurring after treatment
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