The floor plan of the basement itself remains unchanged, as a new ground floor and a new upper floor are being built on the existing basement, with an identical footprint to the original. The deviations in the floor plans of these floors certainly have little impact on the load transfer.
The construction of the walls definitely has nothing to do with how prefabricated houses are built nowadays. According to the historical execution documents, the load-bearing exterior walls have a thickness of 14.6mm with the following structure:
12.5 mm plasterboard
10.0 mm chipboard
0.1 mm polyethylene film
90.0 mm timber framing
80.0 mm thermal insulation
10.0 mm chipboard
Moreover, it should not be overlooked that the new intermediate ceiling is made of precast concrete elements. I generally consider it plausible that the old foundation cannot bear the load of the newly planned house, but of course I am not a structural engineer myself and have never seen the new structural calculation.
Am I basically entitled to these documents?
What do you mean by your second paragraph and the 50k heavy threatening scenario?
That the contractor knows that with so much money invested, 50k already paid + 17.5k additional claim, the lawyer fees are more deterring than his claim for the foundation of 17.5k and he therefore thinks we will agree to cover the costs?
Unfortunately, I cannot fully grasp the point you want to make here, but I would like to :)
