The muster ranking - what else was added?

we had nothing with the interior doors. That's why I ask: what can you really upgrade there?

Better interior/material Different door handle sets Glass inserts Wider and taller Plenty available

we had nothing with the interior doors. That's why I ask: what can you really upgrade there?

Size. Foiled on lacquer on veneer. Glass insert. Honeycomb on tubular chipboard on solid chipboard on solid wood. Flush. Magnetic lock. Drop seal/sound insulation. Handle

we had nothing with the interior doors. That's why I ask: what can you really upgrade there?

From honeycomb doors (cardboard inside) to particleboard core (chipboard inside) or even solid wood finger-jointed can quickly be a 200 to 400 euro price difference. Per door.

we had nothing for the interior doors. That's why I ask: what can you really upgrade so much there?

The standard would have been those basic doors you know from every rental apartment (which I basically don't find terrible but also not notably nice), and now we're getting solid white wooden doors in a country house style, one of them with a glass insert (pane window). Also, one door is made more like an exterior door because it's between the normally heated kitchen and the basement replacement room (without underfloor heating). Visually, it is designed like the other doors... that one, of course, cost the most.

What I would probably specify for interior doors and have not yet read in any construction performance description are handle sets from Franz Schneider Brakel.