Moist walls in the basement have different causes

It is very difficult to judge which cause is responsible for damp walls in the basement. In almost all cases, the advice of a specialist must be obtained. Before can be examined by exclusion, if the cause is less bad.

Indications of the right time

Basically, there are two main causes of damp walls in the basement. If the moisture forms from condensation, a costly renovation is usually not necessary. This also applies to moisture due to splashing water or leachate, for example from garden soil. In these cases, measures can be tried that require no excavation and external re-coatings.

If the cause of the damp walls in the basement of rising water from the soil under and around the basement is around, a costly renovation is usually unavoidable. A malfunctioning drainage around the house can be the cause. Damage or defects in the bitumen coating are another potential cause.

First aids for dry walls

  • Set up a powerful dehumidifier in the basement and watch the effect.
  • The windows and air supply keep closed and two to three times a day a few minutes airing.
  • Wall drainage from inside with Mauerloch injections, for example with saltpetre.
  • Professional interior sealing with sealing slurries
  • A veiling injection in which a sealing gel is injected through holes into the ground, which spreads and seals the basement walls and bottom plate.

Rising water from the outside

In the case of strong moisture, which persists, an independent construction expert, for example from the TÜV or the Chamber of Crafts, should determine the cause. It measures salinity and the degree of saturation moisture. From this it is determined whether it is ascending moisture from the soil.

Tips & Tricks

If you have damp walls in the basement, for safety's sake, immediately order an independent appraiser. The costs for this are usually lower than "trying out" different drying methods.

Video Board: Eliminating Basement Moisture