Keraflex on plywood

[zapatista]

Hi,
I have bought Mapei Keraflex to lay slate tiles on a plywood base. Will I need to prime the plywood before using the Keraflex and if so which primer should I use? Some say I will need to use Primer S but others say that there is no need to with Keraflex.


Thanks
David Bass

[Sir Ramic]

No need to prime according to Mapei. What thickness is the ply and is it WBP ply ?

[zapatista]

Thanks for the quick reply.

The ply is 10mm thick. I am not sure if it's WBP as it was fixed by Wickes as part of my kitchen installation. It is well screwed down though as i have read that warping can be a problem.

[deanotile]

What is underneath the ply?

[zapatista]

The original floorboards.

[Sir Ramic]

15mm is BS, It wont be 10mm anyway, 9mm is normal size but too thin IMO.

[deanotile]

The original floorboards.

then 9mm is no good

[kilty55]

9mm is too thin,amazing how many companys think this is okay to use

[deanotile]

you can over board with a 6mm tile backer board

[zapatista]

Thats a bit rubbish. It is only a small area though so hopefully it will be ok.

[kilty55]

slate is expensive,so is adhesive,so is sealer mate

if it fails you will be kicking yourself,

[Sir Ramic]

Thats a bit rubbish. It is only a small area though so hopefully it will be ok.

Will you be tiling it then.. Lets say the first time will be practice...next time you will do it right.

[TF Ed]

id definately overboard with the 6mm backerboard. leave a 2mm joint around the perimeter of each board and fill with silicone. personally nowdays, its russian roulette tiling onto some of the cheap imported plywoods that are out there..

[zapatista]

Will you be tiling it then.. Lets say the first time will be practice...next time you will do it right.

I did want to do it myself, but I'm thinking twice about it now.

[Pebbs]

Thats a bit rubbish. It is only a small area though so hopefully it will be ok.

Whats a bit rubbish? the 9mm ply...yes indeed its a bit rubbish, so overboard it and save yourself the worry

[kilty55]

ZAP,if you over board it you can still tile it yourself,a little prep and its sorted

[zapatista]

Ok, I'll do that. Thanks for the good advice.

[deanotile]

its ok to do it your self but do it right

[Sir Ramic]

Advice is free, Mistakes are expensive