Condensation

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What is condensation?

It is one of the most common causes of damp within homes and occurs when large quantities of water vapour from general everyday living become trapped within a property. When the warm moist damp air comes into contact with cooler air, or a surface which is at a lower temperature, the result is condensation. This can prove ideal for the germination of the commonly associated black mould.

What can be done to prevent condensation?

  • Increasing the temperature of the object to be protected keeping it above dew point temperature. On the walls, that can be achieved by insulating the external walls. In the case of the windows, this can be achieved by replacing them with one with modern insulation properties and standards.
  • Reducing the moisture content of the air by ventilating the wet warm air from the inside of the property to outside and replacing it with cooler drier air from outside. Opening the window is one solution that would help but is not sustainable due to the cost of heating and security. You could install a dehumidifier which again would help but is not sustainable due to the cost of power and the fact that the size of the dehumidifier is not large enough to process the volume of air required. My advice is the installation of fixed ventilation throughout the property. This could be in the form of humidity sensitive extractor fans which come on when humidity goes over a certain level. This system will be more energy efficient and therefore more sustainable. It is also more likely the tenants will use them.
  • Install extractor systems in the bathroom and kitchen which are the sources of most of the moisture. This could be in the form of humidity sensitive extractor fans which come on when humidity goes over a certain level. This system will be more energy efficient and therefore more sustainable.

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