I thought French Building regs prohibitted the use of Gypsum substrates in Bathroom floors. Is that not correct then. I would have though Agilia Sol C steel would have been more appropriate over there in the bathroom floor. Not that it is a problem if you intend to tank it anyway.
It's possible, but I'd be surprised. I had 2 quotes from separate suppliers & neither of them, nor the plumber, nor the mason batted an eyelid. Both the plumber & mason seem to be well aware of the French norms (picture sucking of teeth & shaking of heads whenever I suggest an English way of doing things).
Re tanking, I'll put my plans into the wetroom thread & you can all give me the benefit of your experience there, where others are more likely to be able to find it & benefit too.
No-one any experience of tiling up to uneven (stone) walls, or advice on the Marcrist CC750 curved disk ?