Ply + SLC + cement board

[cky]

Hi

I'm looking to tile a cloakroom floor with 450x450 porcelain tiles (and later a small bathroom). I'm a competent DIYer and tiled walls before but not floors. As usual I like to be well informed before starting a job and hoping on some advice or direction to further reading.

It is wooden floorboards which slants about 8mm over a 2m length (and some unevenness along the length). I was thinking of ply screwed down, SLC and then a backerboard. Is this recommended? What thickness ply and backboard should I use to ensure the floor is sound, bearing in mind I want to minimize the height.

I've found a lot of advice in this forum and on the web in general about the thickness of ply to use but nothing when trying to do the above.

Thanks

Chi

 

[DHTiling]

If the boards are secure and very little deflection... then cement boards ( hardibacker etc ) and you want the floor bubble level then slc on top of the cement boards/// if you just want a flat floor, then cement boards will suffice if the floor is pretty flat as it is.

 

[charlie1]

Hey chi, your a diyer? I've seen so many attempts ....infact 99% of DIY attempts at tiling end up simply not up to scratch from guys who can turn there hand to most things. I think you should hire a tiler and save yourself a lot of bother ripping the floor up a few years down the line. Timber floors can be tricky to get sound and level, don't think slc will do it for you there is a lot of skill goes in to this process alone never mind leveling the tiles + getting a suitable coverage in order to make the floor last. But here is the best plan, to keep the height down....I can give you the info but not the skill! Remove current floor boards then add nogins between joists,then replace with 18mm ply, then 6mm backer board, then slc, then tile.

Tools required: wet cutter, dry cutter, core cutters, good quality stabila level, 6mm trowel, 10mm trowel, grout float, power drill, high torque mixer, Stanley knife, undercut saw or fein type saw, circular saw.

Good luck