Prevent mold - is that even possible?

Mold makes many people afraid - and quite rightly so. In today's hermetically sealed and highly insulated buildings, the danger of mold growth has even increased. How best to prevent a dreaded mold can be read here.

Main preventive measures

  • Check humidity
  • Optimize ventilation behavior
  • Detecting and eliminating building damage
  • do not carry out individual refurbishments
  • lime coatings

These measures can already reduce the risk of mold growth very effectively.

Check humidity

What mold fundamentally needs is moisture. Only where it is sufficiently moist can a mold thrive. Other basics, such as oxygen, nutrients or the appropriate pH environment, are usually difficult to remove from mold - if there is insufficient moisture, however, the fungus will dry out and can not live.

Relative humidity

The relative humidity (see also dew point) is the measure of how much humidity the air in the room is saturated. The relative humidity always refers to the particular air temperature that currently prevails. As the air gets warmer or colder, the relative humidity changes.

Measure air humidity and possibly wall humidity

Humidity can be easily measured in any room with a simple hygrometer. The relative humidity in percent is displayed directly on these devices. Digital hygrometers are already available from around 5 to 6 EUR.

A special moisture meter for professionals, which can also measure the moisture of wood and building materials, you get from around 30 EUR in the trade. However, a measurement is not necessary for prevention.

Optimal values

The indoor humidity must not exceed 60% - even near the wall surfaces. Optimal values ​​are between 40 and 60 percent relative humidity. You can regulate them by ventilating the rooms. This alone can often prevent mold growth.

Optimize ventilation behavior

Proper and targeted ventilation is essential for preventative mold control. By venting excess moisture is removed, and thus the risk of mold growth massively reduced. Forced ventilation systems are also possible and often quite effective.

Detecting and eliminating building damage

These include above all thermal bridges or improperly executed insulation and thermal insulation. Condensation or damp areas are an absolute warning sign, and you should make sure that the insulation measures are always adapted specifically to the existing construction situation.

Do not carry out individual renovations

Just damaging the walls, but not swapping the windows for those with a lower U-value can be very problematic. This is, for example, one of the main causes of mold formation after energetic renovation measures (insulation). Renovations should always be completed and coordinated.

lime coatings

Lime creates a pH environment on which mold dies very quickly. Even so, you can avoid mold growth. Lime paint can therefore be a good preventive.

Tips & Tricks

Especially in old and historic buildings and in vaulted cellars, the so-called air-lime plaster has been proven to regulate the moisture and bans the mold danger often.

Video Board: How to Prevent Mold in The Home