Renovate fe In many existing buildings, especially in old buildings, damp walls are a constant issue. For dehumidifying the walls, there are several methods that are used depending on the situation. Below we describe the setting of a horizontal barrier.

First, you must determine the cause of damp or wet walls. There are different causes in question. The following are the most frequent ones:

Rainwater and meltwater does not seep away quickly enough (lacking or defective sealing of the outer walls)

Pressuring groundwater (defective or insufficient sealing of the outer walls)

  • Defective floor seal
  • Changed requirements due to changed handling of drinking water
  • In recent years, the The problem of the lack of sealing of the basement foundations in some regions, because the increased environmental awareness of people and more economical equipment saves a lot of water. Thus, in some areas, the groundwater levels have increased significantly. Older existing buildings then often no longer meet the current requirements. Ent Damp or seal masonry from the outside

A drainage or in combination with a perimeter insulation can be used to seal the building from the outside. That is not always possible. Then usually a horizontal insulation of the wall is made. Ent Dehumidify and seal the wall from the inside

For this purpose, a special sealant is injected into the masonry, which in principle reacts like water glass: it hardens and seals the pores in the masonry so that the capillary effect can no longer occur. Bohr The drill holes are set at a maximum of 10 cm above the ground every 10 cm at a 35 degree angle and a drill bit size of 12. There should be at least two rows offset from each other. Then the holes are accurately blown out. Special funnels are used to fill the sealant. The times for curing by the manufacturer must be observed.

Loose, broken and wet plaster should be knocked off 15 to 20 cm above the ground. Then the wall is completely dehumidified with heaters. Only when the wall is really dehumidified, appropriate plasters and, borehole sludge, etc. are applied. Ent Dehumidify the wall with the aid of a particularly vapor-permeable plaster

It may not be necessary to use a horizontal barrier to dehumidify the wall. Depending on the requirements, it may be sufficient to knock off the old plaster and replace it with special plasters that are maximally permeable to diffusion. Then, if necessary, the water in the wall can evaporate so quickly that the capillary effect is also broken.

Tips & TricksThe horizontal barrier requires a precise procedure. In particular, the dehumidifying and drying of the relevant wall has always been a major problem, so that specialist companies have new legal requirements, as the dehumidifying of the wall must be carried out exactly. If the wall is not completely dehumidified, the seal is often short-lived.

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