The plaster has discolored and is peeling off

Hello - I have noticed discoloration on the exterior plaster in the entrance area of my building, which is about 6 years old. Now there is also some damage to the top plaster.

I know remote diagnosis is difficult, but a question for the experts:
- mechanical stress or possibly moisture damage?
- does something need to be done immediately and if so, what would be the right measure?

Pictures attached.

Thanks for your assessment

Moisture rises, there is no sealing and I also do not see any foil.

Apparent moisture. Rises from below. But it seems to have been there for quite a while, doesn’t it?

Apparently moisture. It rises from below. But it seems to have been there for quite a while, right?

I first noticed it in the summer - but to be honest, I didn’t think much of it.

Is it superficial or could it be a deeper damage? What would be the right way to deal with it? Is immediate action necessary?

In fact, one has to say that it looks worse in the pictures than it does in reality.

Seal with a thick coat and a dimpled membrane.

The recommendation with thick coating and dimpled membrane is too generalized.

It is either a splash water problem or rising damp. It is probably rising damp. A professionally executed waterproofing would, for example, have been extended over the panels. If proper sealing is to be done, the panels must be removed. Is the damage only in the reveal area? That would be unusual. The waterproofing must then also be carried out below the upper edge of the soil, otherwise it is all in vain. The base should normally also be constructed differently. The existing top plaster is probably not suitable for the base either. So either invest proper work or live with it.