Advise on replacing bathroom floor

[tony Dimartino]

Hi All, I am after some help. I am looking at replacing my bathroom floor, its currently tiled on to chipboard. I was intending to replace the chipboard as its suffered water damage with 18mm ply then cover with 6mm Hardie backer but i am worried that this will make the floor height to high once tiled. Does anyone have any advise to keep the level lower, I was thinking of putting noggins 18mm from the top of the joist and insetting the ply between the joists and then laying 12mm backer boards on top?

 

[Perfect Tiling]

I'd agree with the above. put on new plasterboard and tank it. I doesn't need to be moisture resistant...not if your tanking it anyway. Also, some shower walls are on an external wall which requires duplex (foil backed) plasterboard and you don't get foil backed moisture check plasterboard (not up here anyway). When I'm doing floors I use a piece of stainless steel quadrant trim on the edge under the door...I leave about 6mm protruding for the carpet to be tucked under. It gives a nice slim rounded edge.....no stubbed toes!