Do you have a condensation problem?

When warm moist air comes into contact with a cold surface, the warm air condenses and the moisture is released onto the colder surface causing condensation, which in turn can produce black mould to form. Day-to-day activities such as cooking, washing and drying clothes, heating and even breathing produce water vapour.

Air in the majority of homes is usually around 50-70% relative humidity. Problems can occur within a building when the moisture content becomes too high. This can sometimes be caused by defects within the building. For example: old houses often have no damp-proof course which means moisture from beneath the house rises up into ground floor rooms which when combined with inadequate ventilation will result in condensation.

Here are a few ways you can control the problem of condensation: 1. Control the humidity in your home using extractor fans in wet areas such as kitchens and bathrooms. 2. Ensure there is adequate ventilation. Trickle vents in windows work well, but a more sophisticated option is a heat-recovery ventilation unit. These replace the air in your home by taking the damp air outside, and bringing fresh air back in via a separate grille, passing it over a heat exchanger to be warmed. 3. Additional insulation/ dry-lining to internal surfaces so that walls are kept at a temperature above the dew point of the air inside

If you have any queries or would like further information or clarification on any building issues, please feel free to contact Philip Hobson at ACE Building Surveys. Tel: 07702 332 333 or Email:

Leave a Reply