Which backer board

[2020Tiling]

Hardy with spf all day long.. I never knew the advised against it. surly it can only help?

 

[charlie1]

They categorically advise non flexi adhesive. If I remember right, the adhesive is in no way there to stick the boards down, it's simply filling the voids between the board and timber. So as a void filling entity, I can see why non flexi would perform better and increase the rigidity of the floor.

 

[White Room]

if you do ever get a failed floor then don't give them an opportunity to pass blame, follow manufacturers instructions.

So we have rely on about 8 Turbo screws 25mm to hold on....

 

[charlie1]

So we have rely on about 8 Turbo screws 25mm to hold on....

I don't set the guidelines, I'd guess around 50 screws per board. Yes, it's the screws that hold the boards to the floor, not the adhesive.

 

[White Room]

I don't set the guidelines, I'd guess around 50 screws per board. Yes, it's the screws that hold the boards to the floor, not the adhesive.

More holes than a pin cushion....

 

[2020Tiling]

Might as well use a non flexi slc to fill the voids haha... (joking) don't try this kids!! :yikes:

 

[rj1884]

What do you guys think of plastic ply

 

[Andy Tiler]

What do you guys think of plastic ply

I don't think id trust it purely because there's a plastic sticky back coating that's holding it down???!

 

[The Legend; Phil Hobson RIP]

I don't think id trust it purely because there's a plastic sticky back coating that's holding it down???!

Just seen this I agree with Andy re. plastic ply. As far as the boards go Marmox, Wedi, and the like are no good on floors if the tile is less than 50mmx50mm ie. mosaic, geometrics, due to point loading issues.

 

[johnryan]

What do you guys think of plastic ply

used it once before on new build flats. only used it due to moisture proof flooring, and this was the only thing that i could find that the manufacturer said can go onto that substrate, after being informed by several adhesive tech depts that none of their adhesives can be guaranteed to stick to green chipboard.also, the architects/builders refused to let me raise the floor the 8 or so mm with hardi or marmox. it was very easy to work with, and been 2 years now and no call backs. however was a great worry, and probably wont use it again.