Window & door installation not compliant with standards

I can't follow you at all. By the tape, you probably mean compressible tape, I can still get that far. I googled Purenit, but what the hell is a larch base, where is it supposed to go, and why does it prevent the screed from leaking (where to), and which concrete bases should a floor slab have and why, and what do you torch them with? I add up your wall construction to 162 mm, who builds like that? Seven thousand euros is not a small amount of money for a front door, rather a lot, which material did I not read here (?), I expected a specialist company and not some half-baked vague statements, but clear verifiable installation instructions. Standard-compliant window installation seems to be almost a rarity these days, foam is used everywhere very generously and gladly as an alleged proper substitute for correct measuring and precise installation. You write on one hand that you have too much time to constantly hang around the construction site - on the other hand, you let the bunglers get away with it until the whole stuff is installed in such a way that correcting it would cause more damage than anything else. What is your mother tongue, if I may ask?

As a professional, you should know that a wooden wall still requires some kind of supporting element.

Whatever expert your incomprehensible words may be about, wood is in any case an excellently suitable building material for all kinds of perfectly self-supporting constructions.

Even as a ceiling slab in multi-storey buildings without sound transmission.

But the soundproof ceiling usually only applies if it is made of concrete.

"Why should I care about what I said yesterday," once said Chancellor Adenauer