20mm brick slips on 12mm ply - Tile Advice

[Jamorgan90]

hi all,

Looking for some advice. Tiling 20mm thick brick slips onto 12mm ply wood on the walls. It is fixed very well. I am just wondering what prep people would do and what adhesive you would use. Changing the ply for plasterboard or hardi is not a option.

 

[Qwerty]

Why is another substrate not an option?

 

[Rookery]

Inside, outside??

 

[One Day]

Ply is not suitable these days. Everywhere I look I see failures involving ply.
Save yourself the risk and overboard it with 6mm wedi board or similar. (even dare I say it - 6mm hardibacker)

 

[Bond]

If your sticking with the ply, a flexiable cement based adhesive, prime well and apply slurry or burn a tight coat of flexi adhesive on to ply . Before applying slips.

 

[Bond]

Should have said above, use SBR in the slurry or burn coat.

 

[Qwerty]

But you will still have the issue's with expansion and contraction, swelling etc

 

[LM]

Why do something that is more than likely to fail?
Either replace or over board the ply.

 

[Bond]

If you use SBR and water at 50/50 there should be no issues with flexiable cement based adhesive over ply. Most failures occur due to inadequate preparation. Remember the ‘p, prior planning and preparation prevents **** poor performance.

 

[Perry]

Dont do it. I do it for a living.

 

[Bond]

I would be confident enough to do it,( no problem) it’s up to the OP.
He said changing or over boarding is not an option.

 

[Perry]

I have seen the aftereffects many times. People injured court cases.

 

[Bond]

If done correctly, there should not be any problems.
In March of this year, done a job with random stone slips ( up to 30 mm thick) on a feature, behind a free standing log burning stove. Was a bit apprehensive initially, however it worked , a that was with open joints ( without grout or pointing).

 

[Jamorgan90]

Inside, outside??

Inside

 

[Jamorgan90]

Dont do it. I do it for a living.

What makes you think i do not? Because I am asking a question and don't act like I know everything?