Build a terraced end house with an additional unit (GÜ) on your own

so if the architect didn't know,
then he's a fool, or he really doesn't know, but then I'd be careful because a lot of other things could go wrong. Or he's saving the underpinning at your expense.

Well, the architect only does the pure planning – the rest is handled through individual contracts. So he would have no benefit at all from saving on the underpinning.

However, he now knows that we as neighbors are not fools who wouldn't notice. We will keep monitoring this.

The underfloor heating is almost installed, so that the screed can be laid on time by 09.03.

A bit off-topic and also a question to the wider audience:
Who is the manufacturer of the underfloor heating pipes? Which PEX variant is it and how was the oxygen barrier implemented?

I personally worked for several years at a large plastics processor. I still remember how meticulously it was ensured that the EVAL layer was present. I set up the process data monitoring and developed systems for peroxide elimination (to avoid long heating times).

Do your pipes also have a PE protective layer so that the barrier is not damaged? Ours was bright red so that any absence would be immediately noticed.

Has anyone here ever used or been offered the clamp-free installation method with Velcro tape? It is supposedly faster to install and allows for a thinner screed.

Edit: I mean this installation variant:

Wouldn't you prefer to discuss that in a separate thread?

I read this thread here yesterday:

https://www.hausbau-forum.de/threads/schutzrohr-fbh-im-Bereich-der-bewegungsfugen-vergessen.33985/

I wonder when and where these expansion joints are made? Is that more common in large rooms? Does this also affect me in a terraced house, and should I pay attention to certain protective tubes before laying the screed?

So: expansion joints will be made in the screed between all rooms, under which the heating pipes should also be equipped with a protective pipe.

This was confirmed to me again by our main contractor today. Sometimes the plumber does it, often also the screed layer. In our case, it was done by the plumber today.