Help required - Please!

[paul flight]

12mm ply the dita matting then tile. this stops cracking but as a tiler you should know this a!!

 

[kilty55]

hi broughty. personally i wont use ply anymore myself for exactly the same reason.....i dont trust the quality of ply i was getting from either the merchants or b and q sometimes the sheets were split /sheering even before fixing.....and with the temperature differences in bathrooms and the humidity i dont think imo that ply has any place in a bathroom now.

i use cement boards it is slightly more costly i can only advise you to do the same

its only been the last 6 months really i have been called to so many jobs where this has happened with the ply

 

[sgd tiling]

where the gap between ply fil with hard as nails then smooth down,let it set,then tile again

 

[diamondtiling]

where the gap between ply fil with hard as nails then smooth down,let it set,then tile again

Don't fill the gap between the ply with hard as nails, its an expansion gap.