Wetroom floor construction

[Flintstone]

I'm doing one at the moment and it was boarded level with the tray then ufh on top and into tray.

 

[Lakey]

I'm doing one at the moment and it was boarded level with the tray then ufh on top and into tray.

Were tile backer boards used or straight onto the floorboards?

 

[Flintstone]

Insulation boards yes.