How to prevent condensation and mould

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

Read the transcript for the 'how to prevent condensation and mould' video (PDF 112kb) 

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.