Moisture can act on the building envelope from inside and outside in the form of gaseous, liquid and solid water.
Groundwater, rainwater or water vapor in the form of moist air act on the components of the building envelope from the outside.
From the inside comes water at the taps in bathrooms and kitchens as well as water vapor by exhalation of man from to
to 2 liters a day or when heating water and as existing building moisture in the components on.
Building moisture is caused by the amount of water bound in the construction of the building (mixing water, rainwater).

Moisture leads to various damage and in severe cases to the destruction of components and thus changes the
Properties of the building fabric.
This has a significantly reduced heat protection, a deterioration of Wohnbehaglichkeit and thus additional heat energy losses
result.
Damage to interior and add-on parts as well as furniture due to swelling and shrinkage can be caused by moisture transfer.
The humid environment promotes the population of insects and fungi, mold and thus leads to health problems of the inhabitants.
In order to avoid damage caused by moisture, general measures are required for building waterproofing and climate-related moisture protection
constructive urgent consideration.