Flat roof structure: state of the art?

Hello everyone,

my flat roof is planned as follows. Is this construction sensible or state of the art? Actually, I never wanted a flat roof, but now it is hardly possible otherwise from a construction point of view, so it should at least last as long as possible.

Yes, that's how you do it

You can also take a look at all of this nicely and colorfully on the Bauder website.