Building drying

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Building drying is the drying of a building . This includes drying out the building moisture introduced by the construction process as well as drying out water that has subsequently penetrated.

Causes of building moisture are for example:

  • excess mortar water
  • water released by setting processes
  • if the building materials have absorbed water when stored moist.

There are many reasons for water ingress, for example:

  • In the case of unfinished buildings with no roof or windows, the penetration or blowing of precipitation
  • If the roof is damaged, the seepage of precipitation
  • After a flood , the surface water or the raised groundwater level will penetrate the deepest open point (well shaft, drains, basement window shaft) and first flood the basement
  • Fogging of cold cellar walls after condensation from the air humidity or after the settling of fog droplets
  • due to rising damp ( capillary moisture transport)
  • after diffusion of humidity and condensation in the component.
  • Structural damage (burst pipes, leaking pipes and water seeping in from joints or cracks)

Process for building drying

ventilation

Moisture storage functions for some building materials

The simplest method without technical aids or auxiliary energies is the drying of masonry by ventilation. New buildings in particular are often dried by ventilation to dry out the excess building moisture bound in mortar and screed .

Premature application of materials that block or hinder water vapor, such as thermal insulation and floor coverings , will delay drying out.

The evaporation depends mainly on the following factors:

The decisive factor for the drying is less the temperature of the air used for drying, but the water absorption capacity of the air, i.e. the relative humidity , the wind pressure (which can blow away humidified air and provide fresh, dry air) and the sea level (as the air pressure increases with increasing If altitude drops, the boiling point also drops by about one degree per 300 meters of altitude, with evaporation the partial pressure ).

See also