Capillary moisture occurs in buildings whose hydro insulation is missing or damaged. The most important building materials are porous and the surface tension of the groundwater causes it to rise in the tiny capillaries in the wall building material and also spreads to the basement.
The most important signs for capillary moisture are:
- Unpleasant moist odor
- Plastering falls from the walls; Delamination of wall layers
- Protrusion of lime and nitrate
- Salt appearing on the wall surface
- Particularly cold surfaces
The water enriched with the salts contained in the soil can rise up to 1.5 meters and more above ground level. Then it begins to dry on the surface of the wall, which results in the formation of a salt deposit and the chemical decay of the plaster on the wall. Frost accelerates this process. A new plaster and the so-called dehumidifying plaster cannot dry damp walls alone.
In contract processing at Ebbecke Verfahrenstechnik AG in Bruchköbel, capillary moisture is prevented by means of various drying systems.