Plywood over floorboards

[mutley racers]

To be honest, am not sure what the walls are prepped with, they have tiles on them already, which need to be removed. But i have come across some old houses that cemented the tiles on. And when i had to take them off, i basically had to rip all the old render off right back to brick. So, i am just thinking the worst here

 

[mutley racers]

Hi Rich, thanks for that Link, that is great! Just one question though, when you say to use the cement backer boards, do you mean put this straight on top of the floorboards/ Or do you take the boards up and put these straight onto the joists?

Cheers mate

 

[Mike]

The cement boards go over the existing boards, they don't have enough strength on their own.

tapatalk on my HTC

 

[mutley racers]

So, if i wanted to remove the floorboard, i would have to put 18mm ply, and then the cement boards on top of those? But then, this would be pretty much the same height as the original floorboards any way wouldn't it.

 

[Mike]

So, if i wanted to remove the floorboard, i would have to put 18mm ply, and then the cement boards on top of those? But then, this would be pretty much the same height as the original floorboards any way wouldn't it.

It would be the same height but a deflection free floor if done right and an ideal substrate to tile onto

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[nybor62]

as above

 

[Rich]

Sorry, I may not have been clear in the thread that I linked to, the backer boards are for over boarding and are not suitable for fixing straight onto the joists. The heights are irrelevant, you need to get floor suitable for tiling and removing the floor boards and replacing with min 15mm wbp ply and over boarding with 6mm backers would be the best way of doing that. If the floor boards are in good nick (no rot or damage then you could over board straight over these as long as you could fix them down so that they were bounce free.

 

[mutley racers]

ok, cheers rich. You were clear. Thanks for all the advice mate. i really appreciate it

 

[TilerBhoy]

Your mimimum tile backerboard overlay on T&G boards or chipboard / plywood would be 10mm, standard flexi adhesives offer no guarantee if any less.

 

[Ajax123]

Your mimimum tile backerboard overlay on T&G boards or chipboard / plywood would be 10mm, standard flexi adhesives offer no guarantee if any less.

10mm eeeeek!!! 15mm should be minimum for ply shouldnt it and chip board is not good for tiling........