ᐅ Damp or moisture in the wall caused by inadequate ventilation after screed installation

Dear building experts,

In my father’s new house, the walls are cracking as if they were tectonic plates.

He told me that 3-4 weeks passed between the screed installation and the first ventilation.

It seems to me that moisture has penetrated the beams of the prefabricated house, causing the building to now "move."

Can anyone advise me on how to deal with this? Or where the regulations are regarding how builders are required to ventilate?

Thank you very much for your advice.

Check the construction and performance specification (Bauleistungsbeschreibung). There is usually a paragraph stating that the homeowner is responsible for ensuring sufficient ventilation after the screed is applied.

Ventilation is always the responsibility of the homeowners.

stenh1978 schrieb:

He told me that 3-4 weeks passed between the screed installation and the first ventilation.

Why wasn’t ventilation done earlier?

What exactly is cracking here?
Is it the finished drywall or the plaster? Is the building already occupied? Please clarify.
Photos, construction progress…

Your father is building again at 65-70 years old? 😉

driver55 schrieb:

What exactly is breaking there now?

What exactly does that mean? That was the question.