I don't understand that now either. The 2.75m is measured from the top edge of the raw floor (i.e., without underfloor heating, ventilation pipes, and screed) up to the beams of the upper floor ceiling. From these 2.75m, we would then have to subtract an estimated 18cm for the floor construction and a few centimeters at the ceiling (I don't know how many) for the battens and drywall. However, the battens and drywall can extend beyond the ring beam, so they have nothing to do with the window height. But if I calculate about 58cm for the ring beam and window lintel, then there is barely 2m left for floor-to-ceiling windows, and I think that is a bit too little. Is there any possibility that the ring beam and window lintel could take up less space?
Best regards
Sabine