Black mold in the masonry - how to remove?

When the notorious black mold infested the walls, there is often a bright panic. What makes some of these molds so dangerous, what is the risk and how to fight them effectively, you will learn in this post.

Black Mold

"The" Black Mold does not exist. Only in this type of mold is a biologically different 40 different species that look only more or less similar externally and have the same color.

Black mold is so well-known to us because some of these species can also be found on food. That is why this gray man seems so threatening to us.

Moldy foods are not always the reason for the spread of these fungi. The usual other risk factors for mold can also cause black mold:

  • too high humidity in rooms with insufficient ventilation
  • too small distance from the wall in cabinets or furniture
  • too low room temperature (for longer periods)
  • damp masonry

health hazard

The seemingly threatening food mold actually means a relatively low health risk (except for children and the sick or the elderly). Much more dangerous is the species Alternaria, which is also one of the black-colored species. It also releases toxins into the indoor air that can lead to breathing difficulties or are responsible for severe allergic reactions in individual people.

Superficial combat

If mold is not visible, that does not mean that the threat has disappeared. Mildew is also common where you can not (yet) see it.

The mere washing of mold or the dabbing of alcohol is therefore not enough to kill the fungus. The fungus also lives where a superficial mycelium (the "mushroom body") is not yet visible. In addition, every mold forms a lot of spores, which can spread over the air and reach many other places. So the fungus can spread unseen almost everywhere, even though it seems to have been removed.

Control strategy

It is important to first determine the extent of the infestation. For this, as a rule, mold experts and experts are needed. Only they are able to safely detect even hidden infestation species and to indicate the amount of infestation safely. Thereafter, the cause of the mold infestation must be effectively eliminated. The basic cause of a mold attack is always moisture and moisture. A wall that is attacked by black mold, is therefore fundamentally moist (otherwise the fungus could not live there). It is important to find and eliminate the cause of this moisture. For example: Moisture of the wall due to rainfall

Condensation (eg due to thermal bridges)

  • Improper or inadequate insulation
  • Generally high humidity in the room
  • In some cases, the cause of too wet masonry can be more difficult to detect. Again, you should consult an expert if possible, if the cause is not obvious anyway.
  • Only when this is done, an expert can at the same time to the effective killing of the mold in all infested species simultaneously.

Tips & Tricks Simple "mold sprays" or simply painting the wall are usually not effective enough, even if the moisture has been removed and it is "mold protection paint".

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