Porcelain tiles not sticking to plywood?

[Bill]

What would you use to fix porcelain tiles to ply?

 

[charlie1]

I'm trying to picture this job based on what's been said and I think white beam has a good point... Dry mix going off!

 

[charlie1]

What would you use to fix porcelain tiles to ply?

Webber set SPF rapid primed with webber pr360 / water 5:1 ratio... Everyone is different though. Some on here would not even tile on to ply

 

[Bill]

Webber set SPF rapid primed with webber pr360 / water 5:1 ratio... Everyone is different though. Some on here would not even tile on to ply

should I overlay the ply with backerboard?

 

[charlie1]

should I overlay the ply with backerboard?

Not necessarily ? Does the floor feel solid? What thickness of ply is currently down? Are you a pro tiler or DIY project?

 

[Bill]

Not necessarily ? Does the floor feel solid? What thickness of ply is currently down? Are you a pro tiler or DIY project?

15mm ply screw fixed at 300mm centres, as per BAL advice. Ply is fitted over original 22mm chipboard floor. I'm a DIY tiler, but done a few floor tiling jobs in the house and never had a problem. Just worried about try to refix them to ply and having the same problem again?

 

[charlie1]

15mm ply screw fixed at 300mm centres, as per BAL advice. Ply is fitted over original 22mm chipboard floor. I'm a DIY tiler, but done a few floor tiling jobs in the house and never had a problem. Just worried about try to refix them to ply and having the same problem again?

It wont do any hard other than your pocket to fit hardie 6mm glued and screwed! Make sure there are no height restrictions though. I think where the tiles have failed though is more down to your application. Use standard setting adhesive would be my advice rather than rapid and apply how we described above... You can do it! Or... Hire a pro

 

[beanz]

You still haven't clarified about this chipboard floor.. Is it floating, or suspended? 300mm centres are too far apart anyway.. At the very least, I'd be adding more screws.

 

[Bill]

You still haven't clarified about this chipboard floor.. Is it floating, or suspended? 300mm centres are too far apart anyway.. At the very least, I'd be adding more screws.

It's 22mm thick T&G Caberboard chipboard flooring on suspended timber joists. I've overlaid with 15mm exterior grade ply screwed at 300mm centres.......as per instructions on BAL single part flexible bag. I don't think deflection in the substrate is the problem....seems be an issue with the adhesive sticking to the tiles but NOT sticking to the ply!

 

[beanz]

I'm not saying that's why they're not sticking. But, once you get the laying method down, you don't want them popping up in 6 months because of deflection. And I don't care what it says on the Bal bag, 300mm centres for over-laying is too far apart. 300mm centres into joists/noggins yes, but not just into chipboard.

 

[Lee garnham]

Was the primer able to fully cure before tiling?
Think I would get a reo out

 

[demi34]

First you have to use single part fast flex and not single part flex. Rubber adhesive better then other one.