City villa - upper ceiling

Hello,

....Now my question is whether we should concrete the upper ceiling, that is, the ceiling from the upper floor to the attic, or not?
My father-in-law advises concreting both ceilings...

Here, as is often the case in construction, there are competing demands (structural engineering, energy, costs). If there are sufficient interior walls for bracing on the upper floor, a concrete ceiling can be omitted => costs. Then studio trusses would probably represent both the most economical and the most energy-efficient solution.

Best regards.

We are also building a city villa, but I have not yet seen an offer from a general contractor/general builder who wanted to construct the ceiling over the upper floor in solid form. For us, the question is still open, as we have < 25m distance to the forest and tree fall must be taken into account according to the development plan.