Unfortunately, the communication is wrong at every turn. The general contractor says that he does not hold experts in high regard and therefore does not want to answer all the expert's questions. A list of questions has already been sent to the general contractor. The general contractor says I should trust him. It is proven that other builders who have had their houses built by him are very satisfied. He also showed me some houses that are currently under construction and was able to talk to the other builders. Overall, I am currently unsure who I can trust at all. On the one hand, I can understand the general contractor, who would rather spend his time on his craft. On the other hand, I can also understand the expert, who wants to do his work properly. At the moment, I am caught between the expert and the general contractor and trying to keep everyone happy. It also makes me suspicious that the general contractor emphasizes that no builder has ever commissioned an expert for his constructions.
: I have now involved a third person who is familiar with basement and sewer construction (not an expert, but a craftsman). He said that it is about minor issues and no defects are recognizable. The exception is the improperly installed drainage, as flushing shafts are missing, which is definitely a defect. For this, the general contractor now wants an additional 2000€.