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?

 

[Boggs]

Hardie backer and metal studs, Good luck to whoever gets to rip that out in a few years!
Been there, complete nightmare!!!

 

[Waluigi]

Might be a consideration to use new bare plasterboard on the metal studs. This increases your weight limit.

Boggs, I just had a think about that, what a nightmare as you can’t tear the stuff down.

 

[tony Dimartino]

Hardie backer and metal studs, Good luck to whoever gets to rip that out in a few years!
Been there, complete nightmare!!!

Is it the right way about doing it? Which backing board is best there are so many to choose?

 

[Boggs]

Nope, 20sqm bathroom, porcelain tiles on 12mm Hardie screwed to metal stud work.

Could not get the tiles off the Hardie or the board off the studs. Took 2 of us 1.5 days to strip out!
Also the issue with the dust created by breaking it apart, not good.

Hardie backer has its place but not on metal studs.

 

[Boggs]

Is it the right way about doing it? Which backing board is best there are so many to choose?

I would remove existing skimmed plasterboard and replace with moisture resistant plasterboard, just tank the wet areas.

With tanking you should still be looking at 32kg sqm, so should be fine for 600 x 300 porcelain and adhesive.

 

[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!