Floor heating design shows pipes laid across the whole area which will need a bit of juggling to accommodate the shower waste.
The tile showrooms offer various sizes of pre-formed trays at moderately exorbitant prices. With dry screed I imagine a skilled screeder could create the falls within the tolerances needed for tiling.
My other surprise is that the *tanking membrane* is actually a cement based roll on mix rather than the expected plastic sheet.
I know Tim posted his experiences with setting out his wetroom but is there any other helpful experience in here?