Condensation occurs when warm moist air comes into contact with either colder air or a colder surface. If the air is unable to retain the same amount of moisture the water is released in the form of condensation in the air or on the surface. Examples of condensation are:

  • Misted mirrors after bathing
  • Misted glass on bedroom windows on cold mornings

Condensation in the home mainly occurs during cold weather regardless of whether it is raining or dry.

It is generally noticeable where it forms on cold non-absorbent surfaces and places where there is little or no movement of air, in the corners of rooms near windows or behind cupboards and wardrobes. 
It can form on any surface and it may not be noticed until mould growth or rotting of material occurs.

Tell our repairs team

If there is damp or mould in your home it is very important that you let us know so we can investigate. Please also tell us if an extractor fan is not working, or if you are struggling to heat your home, as issues like these may make damp and mould worse.


Five ways to help avoid damp and mould

1 - Heat your home

  • Ensure the air in your home is warm
  • Heat evenly through the day rather than heating rooms only when you use them – this should also reduce your heating bills
  • Use thermostats to control your heating
  • Avoid using bottled gas or paraffin heaters as these generate a lot of moisture

2 - Ventilate your home

  • Ventilate kitchens and bathrooms when in use by opening windows for rapid ventilation, if safe to do so 
  • Use extractor fans if you have them – they usually cost less than 1p per day to run
  • Keep trickle window vents open at all times
  • Ventilate cupboards and wardrobes and avoid putting too much in them as this stops the air circulating
  • Keep furniture away from walls and allow air to circulate

3 - Put less water into the air

  • Put lids on saucepans
  • Dry clothes outside
  • If using a tumble dryer make sure it is vented to the outside
  • Put a small amount of cold water in the bath before you turn on the hot tap
  • Do not run your shower for longer than needed
  • Mop up any condensation or water everyday

4 - Stop water vapour spreading

  • Shut kitchen and bathroom doors when bathing and cooking
  • Use cooker hoods and extractor fans or open a window

5 - Deal with mould

  • Treat any mould you have in your property by washing walls and window frames with a fungicidal wash that carries a Health & Safety Executive approval number following manufacturers’ guidelines
  • If you do this and follow the other advice given above, mould should not reappear
  • The only lasting way to avoid severe mould is to reduce the relative humidity and condensation by properly heating and ventilating your home