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How does moisture get into walls?
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Capillary action
Many building materials are porous, filled with countless tiny capillary tubes.
When such a material comes into contact with moisture, it literally soaks up the water like a sponge until its saturation point is reached.
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Faulty water-proofing
Normally, horizontal and vertical sealant barriers protect buildings from moisture penetration.
In older structures, however, these barriers are either often absent or they have lost their effectiveness
over the years, allowing the brickwork to absorb environ-mental moisture. The amount of moisture allowed to
enter depends on the level of moisture in the soil, as well as on the porosity of the brickwork. The maximum
level of moisture absorption in masonry is dependent on the degree of evaporation possible and the capillary
density in the brickwork concerned. Surprisingly enough, it can be said that the more imperviously a wall
surface has been plastered, the higher moisture will be able to rise within it, because the internal moisture
cannot effectively evaporate.
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Faulty Renovation
The practice of restoring only a wall’s surface can bring no sustainable removal
of internal moisture. A professional wall drying process can not only prevent
renewed penetration by external moisture, but removes any existing internal moisture
at the same time.
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