tiling on plywood

[grumpygrouter]

Have you tried to assertain how much deflection you actually have in the floor? One easy way is to fill a glass with water right to the brim and then walk around and jump about a bit! if the water stays in the glass, you don't really have much of a problem with deflection. As a belt and braces if that is the case, I would lay the 6mm hardie and tile away.

 

[mondieu]

I have done the test with the glass of water and no water came out so I suppose 06mm hardie backer boards would be sufficient.
What thickness adhesive should I use?
I was recommended to use Bal SBR OR APD and single part flex as adhesive by an expert on this site, do you mix the SBR/APD to adhesive or apply to backer board ? Is it necessary ?

 

[grumpygrouter]

I have done the test with the glass of water and no water came out so I suppose 06mm hardie backer boards would be sufficient.
What thickness adhesive should I use?
I was recommended to use Bal SBR OR APD and single part flex as adhesive by an expert on this site, do you mix the SBR/APD to adhesive or apply to backer board ? Is it necessary ?

The SBR is usually to seal the back and edges of the ply before fixing it to the joists. If you are using BAL adhesives, it is not necessary to prime the floor before tiling, neither with Mapei adhesives. I would personally use Mapei Keraquick adhesives but if you are a little inexperienced then something with a longer bucket life would be better, try Keraflex or Keraflex maxi both in white.

 

[wetdec]

I have done the test with the glass of water and no water came out so I suppose 06mm hardie backer boards would be sufficient.
What thickness adhesive should I use?
I was recommended to use Bal SBR OR APD and single part flex as adhesive by an expert on this site, do you mix the SBR/APD to adhesive or apply to backer board ? Is it necessary ?

If its 18mm ply,screwed to sound joists at 300mm centres and as stable as you say you dont need to overboard it with anything wasting money, put a membrane over it and tile............



,
.

 

[mondieu]

Hi again,

My wife has changed her mind :mad2: and we have now brought beige floor porcelain tiles 400mm x 400mm for the upstairs bathroom floor.
As per above, I am laying 6mm backer boards to plywood floor and then tiling on top,is Bal single part flex or Mapei keraflex still good for porcelain tiles ?

Thanks for all you help,

 

[grumpygrouter]

Hi again,

My wife has changed her mind :mad2: and we have now brought beige floor porcelain tiles 400mm x 400mm for the upstairs bathroom floor.
As per above, I am laying 6mm backer boards to plywood floor and then tiling on top,is Bal single part flex or Mapei keraflex still good for porcelain tiles ?

Thanks for all you help,

Yes they are.

 

[iaincameron]

Hi,
I am a DIYer and am 3/4 of the way through a bathroom with 300x600 porcelain tiles. I tiled onto plyboard floor and went for Mapei Keraflex Maxi in the end. It was a fraction of the cost of Bal and highly recommended here. I paid less than £14 for a 20kg bag from CTD, which seemed a good deal for a non trade person. The Bal SPF seemed to be close to twice that. Only draw back is long setting time for on the floor (24hrs). This was fine for me as I have another bathroom in the house, but if you want to be able to walk in after a couple of hours then Keraquick seemed to be the recommened adhesive.
Cheers
Iain