How to prevent condensation and mould

Watch our short video for helpful advice on how to help prevent condensation and mould in your home

Key points


  • Condensation is caused when warm, damp air, such as steam, meets a cold surface and turns into water.
  • When condensation builds up on surfaces, and they’re damp for some time, it can cause mould to grow.
  • You can prevent condensation by heating your home to a constant temperature - but not too warm.
  • You can also try to reduce the moisture in your home, by
    • Hanging washing outside to dry, or in the bathroom with the door closed. Don’t dry washing on radiators.
    • If you use a tumble drier, make sure it vents outside
    • Cook with pan lids on and use the extractor fan
    • When filling your bath, run the cold water first to reduce steam
  • You should also try to increase ventilation, by opening trickle vents on windows or opening your windows for 15 minutes each day.
  • Keep the kitchen and bathroom doors closed when cooking and showering and leave a window open for 20 minutes after.
  • Keep furniture slightly away from walls to increase air flow.
  • Regularly wipe surfaces that are covered with condensation.
  • If you have mould, use an anti-fungicidal wash and wear rubber gloves.
  • Don’t remove mould with a brush or vacuum cleaner - this spreads the spores.
  • And finally, monitor and manage the condensation in your home. You can do this by buying a hygrometer to monitor humidity and temperature. The ideal conditions are 40-60% humidity and 18-21°c.
  • You can find more information here 
  • And if you’ve taken steps to prevent mould and it isn’t going away please contact us by emailing or phoning 0800 652 0898.