Question about moisture and laminate

Whether the slots are sufficient for ventilating the floor, I unfortunately cannot say; I think you have to try it out. For an architect, it is difficult to assess whether a non-professional solution might actually work - we always think of the completely right thing (which I already mentioned above: sealing, insulating...). However, there are always situations, especially in renovations, where you stand there and think: "Aha, so that actually worked without damage for that long?"

Thank you very much for your help and patience! :)
I will give it a try. :rolleyes:
I sincerely thank you and remain with kind regards
oh!

but moisture and wood, especially for parquet, are an unfavorable combination

Moisture and laminate are real adversaries. I would have omitted laminate here and installed screed with tiles instead. Then a carpet on top.