Moisture damage and mould

Correct heating and ventilation can help to prevent a lot of damage. Moisture damage and mould in the home are among the most common housing defects. Correct heating and ventilation can help to prevent much of the damage. And that means:

20° – 22° C the home should be warm. Windows should be opened fully for short periods of time (shock ventilation). Tilting the windows is ineffective and wastes heating energy.
Carry out a complete air exchange in the flat in the morning. It is best to create a draught, otherwise open the window wide in every room.
The minimum time for ventilation depends on the difference between the room temperature and the outside temperature and on how much wind is blowing.
The colder it is outside, the shorter the ventilation time.

Airing once a day is often not enough. Ventilate the rooms where people have been in the morning and again in the afternoon. Carry out a complete air exchange in the evening.

If you are absent during the day, it is not possible to ventilate ‘3 times a day’, but it is also not necessary! It is sufficient in the morning and evening.

Do not ventilate from one room to another, but to the outside.

Air out after bathing or showering. The water vapour must not be distributed evenly throughout the home. Large amounts of water vapour (e.g. from cooking) should be ventilated outside as soon as possible. If laundry is dried in the home, this room must be ventilated more often.

Ventilate even in rainy weather. If it is not raining through the window, the cold outside air is still drier than the warm indoor air.

Print page

back to overview