Reduce humidity in the basement

The high humidity in the basement often leads to the formation of condensation. This can lead to mold and damp textiles. In addition to a clever ventilation behavior, aids such as fans and dehumidifiers can help. Important is the correct use.

Regulation of humidity

Apart from other possible causes of moisture in the basement, the humidity is crucial. The cold basement air binds less water than warm air, for example from outside or living spaces. The excess water condenses and settles on basement walls, floors and objects.

Avoiding high humidity in the basement is sufficient in most cases to have a dry cellar. This can be achieved by heating up and then venting. As an alternative, devices can be installed that work as a dehumidifier. Special manufacturers offer sensor-controlled fan systems that automatically ensure the perfect cellar climate.


Mechanically functioning dehumidifiers based on granules have a simple operating principle. In a special vessel, a water-binding granules, usually calcium chloride, filled open and removes moisture from the air. Depending on the size of the room or basement, the number of vessels and the amount of granules is adjusted.

Electric dehumidifiers simulate the condensation principle. The air is heated after being sucked in. During later lightning-fast cooling, the resulting condensation water is collected in a tank. The dehumidified air is then returned to the cellar.

ventilation systems

Special building or cellar dryers in fan form combine supply and exhaust air. They change the ventilation direction according to the temperature conditions. A humidity sensor on the outside and an inside control the blower power of the fans automatically and uses the temperature differences.

Tips & Tricks

If you control the humidity in your basement, you should not have anything to do with coarse, damp, wet or damp. Changes such as mold or wet spots then have other causes.

Video Board: Eliminating Basement Moisture