tiling on to plywood

[natnat]

Hi

I recently tiled a bathroom which was boarded out on the stud walls with 12mm wbp(origin china).It was a ceramic tile approx 400mmx250mm.
Ply was primed with acrylic primer then tiles fixed with a good quality single part flexible adhesive.

Floor was joists @ 400mm centres.22mm Chipboard overboarded with 12mm wbp(china origin). tiles are porcelain 300mmx300mm.

All have come away completely from plywood.

I have been using these methods for years with no problems.

Anyone got any input on what the cause could be for this major failure.

 

[White Room]

Hi and welcome.....some very low grade ply has been coming over from china, which your post proves the point...no easy way round this but to rip up.

 

[Ian]

What adhesive was used? Some manufactures specify not to prime the face before application.

 

[White Room]

Read it wrong, after having another read thought the ply was separating from itself....

 

[Dan]

Welcome to the forum. Sorry to hear about your problem that sounds expensive.

 

[natnat]

this manufacturer specifies to prime first

 

[White Room]

Is this the first time you have used this brand of ply for this job...

 

[natnat]

yes it is whitebeam

 

[ruairi mac]

Has adhesive stuck to either the plywood or the tile??

 

[White Room]

Has the ply any delamination or swelling on the surface..