10/11/2025
Condensation happens when warm, moist air hits a cold surface such as a window or outside wall and condenses, running down the surface as water droplets. Moisture left on your walls can lead to black mould. Mould looks and smells bad, can cause serious health problems and damage
clothes, furniture and books.
Areas likely to be affected by condensation:
💧 Rooms where a lot of steam is created, such as kitchens and bathrooms
💧 Outside walls, walls in unheated rooms, corners of rooms, behind furniture
💧 Cold surfaces such as mirrors, windows and window frames
💧 In wardrobes and cupboards
Condensation is different to other forms of damp (such as rising and penetrating). It is not caused by a defect of the building so can often be improved by making small changes.
NEA advises to get rid of condensation in the home using H.I.V.E:
Heating- Try to keep temperatures in all rooms to
above 18°C when you are using them – this will reduce condensation forming.
Insulation- This will stop heat escaping through walls, ceilings and windows, making it easier and cheaper to keep the home warm
Ventilation- This will allow moisture-filled air to escape and be replaced with fresh air. Make sure vents and airbricks are not covered or blocked, use extractor fans and open windows when possible.
E- (reduce) Excess Moisture- Use extractor fans when showering or cooking, put lids on pots and pans when cooking, avoid drying washing indoors where possible. Consider using a dehumidifier in rooms which are prone to condensation or in rooms where you dry washing. If you live in a rented property and you have tried all the above, but the damp and condensation isn’t going away,
then contact your landlord.
If you have black mould in your home, the best
way to deal with this is by wiping the affected areas with mould removal spray. Always check the
manufacturer’s instructions. There are some special anti-mould and insulating paints that may delay the return of the mould but the best way to prevent it coming back is to reduce the condensation in your home.
To read the full leaflet visit https://healthiernw.co.uk/directory_leaflets/national-energy-action/ or https://www.nea.org.uk/