The reasons for walls' damp
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Most of the time, the damp of the walls is caused by the construction damages, misapplication of materials or wrongly made drainage. The problem concerns old and new buildings as well. By not having or having faulty horizontal or vertical insulation, the capillaries transport the moisture from the ground. On the surface tension of water and the size of the capillary in a wall depends how high the damp will be winded up. The absorption depends also on the material (for example, the capillaries can make up to 25% of the brick's weight); as a consequence, in case of contact with water, the wall becomes like "a sponge" absorbing the water. This phenomenon is called capillary damp (winding up water from the ground).
The consequences of capillary damp: Moisture in the walls can lead to the lack of insulation and a heat loss; as a result, the price of heating increases. Humidity = higher bills! Due to visible effects of humidity, such as mould and fusty smell, the value of the building decreases. High level of moisture in the building is dangerous for its residents and can result in many diseases, such as allergies, rheumatism and respiratory system problems. Mould (aspergilus flavus, aspergilus fumigates, etc.), even invisible, can be very dangerous; if it's actually noticeable on the walls, the decision to dry up the building should be made immediately – remember, this decision concerns your health!
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