Hello
In my opinion, cutting off the base slab was idiotic. It would have made sense to place the house on the oversized base slab. The concrete was separated including the reinforcement. And bitumen or something like that was smeared on it. The structural engineer says the structural integrity is okay. Maybe it is. But the reinforcement has no cover. If something goes wrong, the bitumen has a small injury somewhere. After 15 or 20 years, rust will have done its work, the reinforcement will have rusted away inwardly, and the house will settle. After 25 years, some settlement cracks will appear. That would worry me. The structural engineer is not responsible for the correct installation of the reinforcement. He only said: it fits now. Cutting off. Completely insane.
Steven