Marble wet room advise

[Ttt1601]

Hello gents I've got to price for a wetroom, never done one in marble before so just want to check a few things, what tanking system would you recommend? It's 50mm marble mosaics on the floor, with ufh and into the shower tray, then mosaic carrying up the wall 1000mm height, ceramic listello then 900 x900 carrera porc 1 height on top with another ceramic listello above and marble mosaics to ceiling, walls are float and set on brickwork, can this be tiles direct or do I need to hack it all off and overboard fresh?

 

[Flintstone]

Tanking wise, I would use whatever your used to. Tilemaster for me but a lot highly rate Ardex, to tank before the ufh or after, that is the question!

 

[Ttt1601]

I'm tanking before ufh I know that much

 

[J Sid]

use the best tanking system the customer is willing to pay for. For stone id use a sheet membrane system.
marble will let water through over time depending on amount of use.