Screed no functional heating after 7 weeks

Or do I misunderstand "assign yourself"?

We built with individual assignment - so we were always the boss.

Thanks already for all the tips!

So kick your person responsible in the feet, get yourself a handle or if necessary buy one yourself at the hardware store and then get rid of the moisture otherwise it won't work.

Yes, we will do that as soon as possible.

This is not their house! She is not allowed to do that. It is someone else's property. It only becomes hers upon purchase. She can only say if they build it so carelessly I won't buy it.

One can suggest to the developer to help with ventilation, whether they want to or not is another matter – if not, they have to do it anyway.

We built with separate contracts – so we were always the boss.

That was actually our goal as well, but in Berlin it is very difficult to get free plots and to handle the whole thing without a developer.

Also, even with turnkey construction by a construction company, I am the client. The construction is as follows: the construction company and I plan a house on my land. I commission them to build it. They offer a fixed price for this. They have the right to carry out the order as they see fit: for example, with subcontractors. They are responsible for their work. I remain the client. If I pay for something, it becomes mine. So the roof is finished, paid for, mine. The foundation slab... mine. Etc. etc. The developer, on the other hand, is the client: they build a building and sell it to me when it is finished. I buy it as it is. If applicable, I can have some influence on features and execution via a preliminary contract, like with a car. But just like with a car: Ford or the developer builds it, it only becomes mine after purchase at the end. Before that, I have no say in it. This does not exclude giving a notice if I notice something. But whether it is followed is uncertain. K.