Base plaster is falling off. Lime efflorescence

Good day,

I have the following problem:
My approximately 10-year-old base plaster is coming off. It is slowly flaking, and it seems that there are lime efflorescences.
I can no longer say whether cement plaster was used by the plasterer at that time.
It is such that the base plaster was applied to the masonry with reinforcing mesh. There is no insulation; below the base plaster is the perimeter insulation including the dimpled membrane.

Now the question for me is how do I best renovate this? I am not very keen on chipping everything off and redoing it.
I was thinking, for example, to let it dry well, replaster the decayed areas, and then apply liquid plastic from the base plaster up to 5 cm above the pavement right from the start?

What do you think?

Looks like the base at my mother-in-law’s house.

Rising damp was diagnosed there. The structure is the same, even the paving lies as close to the house.

The advice of the expert called in was as follows:

The paving should not be laid so close to the house. The structure with perimeter insulation including dimpled membrane should be redone.
In addition, a gravel strip should be laid at the base. This would prevent moisture from standing at the base.

The membrane should only be cut after all work is completed so that nothing can “fall” between the membrane and the base.

The damaged areas must be chipped off and replastered.

By the way, we also asked about liquid plastic. He said that would not solve the problem.

Thank you for the answer! Yes, the worst part is simply removing the entire pavement.... That's why I thought about raising the [Noppenbahn] that is already there but too deep with liquid plastic up to the top of the pavement. I could do that without removing the pavement! How far does the foil stick out for you now?

We have not yet started to repair the base.

We are currently busy with our new construction and will only get to it during the summer. In our case, the base on the entrance side and also the back side almost completely needs to be removed. This is a bungalow with the dimensions 16 x 11.....det will dauern ops:

No help for it, we must first finish our house. In August we have to move out of the apartment.