stone wall tiles to plywood adhesive

[riff]

What would you recommend as best adhesive stone tiles to plywood. Plywood is 18mm screwed to battens into stone wall & tiles weigh roughly 30 kg per sq metre
thanks

 

[Dan]

So plywood onto existing stone / brick wall, and then stone tiles on that, right?

 

[riff]

yes - stone walls - battens - 18mm ply & tile on that

 

[danmasey]

Make sure the batons are absolutely solidly screwed to the wall. Seen a few jobs before where the batons have ripped out and the wall is flapping around at the top. And that was with small ceramic.

 

[EverDon Tiling]

can i ask why ply and what room is it in?

 

[riff]

Room is kitchen & they're to go on the walls & will weigh 30kg per sq m & ply because it will take the weight & yes I do know they have to be solidly anchored battens & Ill be using the same heavy duty wall anchors that work on my walls & if I can get my roof to stay on in 125mph gales I can surely get plywood to stay on my kitchen walls & can someone please just tell me what's the strongest best adhesive to get the heavy stone tiles to stick to the plywood without falling off? Thank you all! PS I'm having a bad day!

 

[danmasey]

Bal Stone & Tile PTB? I use this on floors for stone but not sure on plywood on walls. Maybe check their website.

 

[Peter]

Would be best plaster boarding/backer boarding over the ply and then using a good SPF. Not ideal to tile straight onto ply.

 

[beanz]

I wouldn't use Ply on walls personally, although i believe it was standard practice back in the day.. I'd go with a cement backer board, where you could just use SPF.. Plaster board won't take the weight either. I would have to suggest a 2 part flexible adhesive for Ply, but as i haven't personally done it, i couldn't really recommend a specific brand.. Good luck with it

 

[kilty55]

as above riff i wouldnt tile stone onto a ply lined wall

 

[widler]

yup plasterboard it,or hardi.
beanz,he said tiles were around 30kg m2,(i am presuming he means addy and grout as well),plasterboard is around 32kg m2

 

[The D]

BS5385 6.1.2.6
Sheets and boards
The use of sheets or boards that are subject to movement from
changes in moisture content should be avoided if at all possible. If
such boards (plywood board, chipboard, some fibre building boards)
have to be used, they should be restricted to small areas and installed
in such a way that they provide a dimensionally stable and rigid
background. The backs and edges of such boards should be treated
against the ingress of atmospheric moisture that would result in
movement and warping. Tiles should not bridge joints between
boards.

 

[Rookery]

Bal Stone & Tile PTB? I use this on floors for stone but not sure on plywood on walls. Maybe check their website.

The PTB stands for Pourable Thick Bed. Good for floors, less so for walls unless you're Paul Daniels! I wouldnt use plywood either, I'd use plasterboard, Hardie or Marmox.

 

[riff]

Thanks for your all your good advice - will reconsider project

 

[beanz]

yup plasterboard it,or hardi.
beanz,he said tiles were around 30kg m2,(i am presuming he means addy and grout as well),plasterboard is around 32kg m2

What's the stone? And how thick is it? I've never fixed stone tiles that are so light!?!