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Condensation on a window

Condensation is the transition of liquid from the gas state into the liquid aggregate state. In a normal household several litres of water vapour is produced over the course of a day and evaporates on cold surfaces, forming condensate. On badly insulated, meaning cold, windows and walls this can quickly lead to black, brown and green stains, formation of mould, on walls. Damp walls are a growth-friendly environment for mould and can be harmful to your health. Mould fungi can cause allergies, as well as respiratory tract ailments and respiratory infections.

To reduce the risk of mould growth due to condensation buildings should be thoroughly aired on a daily basis. Depending on the situation full airing should occur three times a day to ensure a regular air exchange. During the full airing radiators should be turned down to avoid unnecessary energy wastage. A good air exchange means, that the air inside the house, which generally contains a lot of water vapour, is exchanged for fresh, colder air.

However, in some circumstances it can be difficult to air sufficiently. In such cases the use of a ventilator or dehumidifier should be considered. For additional protection from lasting condensation walls can be painted with the Dryzone Mould-Resistant Emulsion Paint. One coat protects walls for at least 5 years from regrowth of mould, even with lasting condensation.

Yet condensation is not always the reason for damp walls and a thorough investigation into the cause of dampness should be undertaken. Rising damp and penetrating damp could also be a reason for mould growth.

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For more information call 01403 210204