I urgently need your advice.

Hello,

What do you think now? Break your head against the wall and tell the construction company, "We'll set the slab lower," or listen to the company and truck in tons of earth, making all the sloped areas in my garden unnecessarily steeper?

I have already written my thoughts on this to you.

The problem with this matter "could" be that your excavator gets into trouble. Even if he gets a "release" from you, a court could later—if you still want to sue against the original contract—rule in your favor and instruct the excavator that he should have refused the order.

But I also don't really understand why you—as a complete layman—are interfering in construction-relevant processes. I would understand even less if your excavator/construction supervisor agreed to this horse trading.

Rhenish greetings

Hello everyone.
It was a stressful week, so I didn’t get in touch anymore.

The excavator broke down the day before yesterday and won’t arrive until next weekend after all.

I also got in touch with the construction company again regarding the height of the slab, spoke calmly with the boss once more, and in the end, he was naturally only concerned about potential water intrusion. Then I suggested letting the slab protrude by about 5 cm only at the spot where the garden soil is the highest, and he immediately agreed and said that would be completely sufficient.