tiling on sloping wooden floor

[sukicat]

Hello
We want a low profile shower tray in our new bathroom,,...but the floor slopes slightly. The shower tray must be level, so what is the best way to make the floor level before tiling it? It is wooden floorboards at the moment. Also what is the best type of adhesive/ grout to use?
Hope it's not going to be a big problem!!

 

[mountford]

One way to do it but expensive is to get BAL fast flex or dunlop 2 part rapid set flex and level the area you need or the other way is to ply line the floor.

 

[gcol]

Overboard the floor with ply as mentioned. See the sticky for details.
Pack the shower up and tile against the tray (hiding any packing).