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Moist masonry - how to dry?A damp masonry is the nightmare of every homeowner. A damp masonry draws a musty smell, there are damp spots on the wall, the plaster breaks off.
The result: the building structure is adversely affected and not harmless to human health is not a damp masonry either.
After all, it is the perfect breeding ground for mold that causes numerous diseases.
One can recognize a damp masonry on flaking interior plaster or if the wallpaper peels off easily. If a musty smell is added, it can be assumed to be 100 percent safe from a damp masonry.
If a wall feels damp then there are no doubts. Now it is time to act quickly, because the longer you take your time with the drain, the worse the damage to the building fabric and the risk of mold growth increases.
Possibility of draining wet masonry
There are various options for draining wet masonry. Of such water damage older buildings are usually affected, because with them, the masonry foundation was usually created without an earth-contacting exterior plaster or appropriate insulation.
So that further destruction can be avoided at this point, either a skin treatment, drainage or an internal seal should be made.
In an exterior skin treatment, the masonry that touches the earth is up
exposed to the lower edge of the foundation in a width of about one meter. After the exterior masonry has been cleaned and loose grout removed, a ground coat is applied to the bottom of the foundation.
This is followed by a moisture insulation by a thick bituminous compound, which is painted as a primer. It
follows a so-called hobbock painting, through which the outer skin of the building can no longer tear.
Then follows the drainage of damp walls, in which at the bottom of the excavation a drainage through a gravel or ballast bed is created. It is important that the drainage has a slope that leads to the existing drainage pipe. Furthermore, a drainage wall has to be created, which is a wall of lock tile, bitumen board or delta pimple foil.
This drainage wall is applied to the insulating wall and protects it from sharp objects. Afterwards, the excavation pit must be filled with sand or granules and compacted. The latter is done with a vibrating plate. Thanks to these two methods, the masonry is now protected against externally pressing water. Even surface water now has no chance.
Draining damp walls from the inside
In addition to the two procedures mentioned from the outside, something against rising water can also be done from the inside. Here, a horizontal barrier is subsequently introduced from the inside into the masonry, which is usually carried out only by special companies.
In such an inner seal several small holes are drilled in the masonry, in which a silicic acid preparation is injected. Then the holes are closed with a fluid mortar. Due to chemical reactions, the wall practically dries from the inside. After this sealing, the chipped plaster surfaces or damp surfaces are removed and repainted.
Here, special plasters should be used, which should be impermeable. These restoration plasters ensure that the moisture in the masonry can still escape. As a matter of principle, it should be noted that the room is completely dry before plastering can be started from the inside.