Levelling a floor for vinyl click lock and a shower

[koomber]

I'm putting a new low profile shower in my bathroom. The floor is fairly uneven but in good condition.

As I'm laying vinyl click lock tiles (tarkett) I'm going to be putting plywood on top. However I've also got to put a shower in which illI need to put on plywood to level it out too.

My issue is that the level of cement/sand mix for the shower will be thicker than the thickness of the tiles.

I'm thinking of cutting the floorboards out under the shower and having it sit on its own ply direct on the joists. I'd use 22mm ply for this. Since the floor boards are 30mm thick the concrete mix would be about the same thickness as the surrounding floor boards so with the ply and floor tiles it would come up about 10mm by the side of the shower tray.

Does this sound reasonable?

 

[blup]

You could screw bearers to the side of the joists so that the ply lies flush with the top of the joists, creating a lower starting point for the screed which would leave room for the shower tray base to be flush with/proud of the top of the tiles if this is what your after.


Blup