Green roofing Sauna & Garden house

but we hardly have any snow in our region. and if anything comes, it melts away

Black Swan, I hear you coming. There is a difference between "usually not" and "definitely won't happen". I would definitely not skimp on the snow load; eventually, the corresponding weather will come, and then everything will collapse. Better to forgo greenery and only leave roofing felt on the roof.

Hello, I have now contacted the sauna builder in writing. Reads more relaxed now, right? 240 kg per m2....

Plan for about 240 kg per m²

I should be able to manage well now, right?