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Causes of damp walls

Wall humidity can have several causes. In most cases, however, the so-called capillary rising damp is the main cause.

Capillary rising dampursachen-mauerfeuchte

Soil moisture moves into the masonry. It dissolves and transports salts and distributes itself via the capillaries in the floor plate and into the entire masonry.

Causes:

  • Missing or defective damp-proof courses
  • Defective or non-existent vertical sealing (especially in older buildings)
  • Hygroscopic moisture (salt attracts moisture)
  • Condensation moisture (cold basement walls, thermal bridges)