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Mould grows in those corners of the wall which are most prone to condensation, i.e. where there is less insulation from the outside, and this happens mainly with old walls.

So the best way to reduce mould growth on the walls at home is to prevent condensation, by dehumidifying the air or insulating the walls.

Dampness can be removed from the room with an electric dehumidifier or an air conditioner, rather than one of those plastic containers that you fill with salts which attract moisture, although the fact remains that these appliances need to be left on the whole day long in order to have the desired effect.

The walls can be insulated internally (with gypsum plaster drywalling, for example) or externally (the method of choice), although that is a pretty big job, one that a painting and decorating company would be well placed to take on.

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