Out door stone fixing

[nipper76]

Hello folkes

I have been asked to price up a job it's a external tiling job on to a concrete slab that is 10" thick laid to a small fall away from the building the slab is reenfoced.

Due to door sills I be building up a thick bed approx 22mm to finish at correct hights.
The stone is 600mm wide random length 22mm thick stone.
My question is can I lay this on a cement and sand bed ? And what mix would be recommended ?
White cement I guess ? And should I add some sbr to the mix to improve adhesion

Also what about decoupling mat (ditra or equiverlant ) any advise greatly appreciated

 

[Bill]

no need to use white cement if you are thinking of laying in sand and cement.

Make sure you put a cement slurry coat on the back of the tile as you fix them.

22mm bed is a little thin for S&C but I have done it in the past, it is not ideal.

I would use a 4:1 ration for the mix as it is so thin. I would also use an sbr to prime the concrete first.

 

[Old Mod]

You can add Ronafix to your mix, that will help with a thin bed.
That's a tip I stole off our very friendly Porcelthin supplier uncle Ray.

I'd also look at using something like Ditra Drain 8 as opposed to Ditra 25
That alone will give you a 10mm lift in height and provide good drainage.
And decouple your stone from the slab.
Then you have far less to make up, and be able to use a ptb adhesive instead.
It's Just another idea.

 

[White Room]

That's a blast from the past Ronafix 🙂

 

[nipper76]

You can add Ronafix to your mix, that will help with a thin bed.
That's a tip I stole off our very friendly Porcelthin supplier uncle Ray.

I'd also look at using something like Ditra Drain 8 as opposed to Ditra 25
That alone will give you a 10mm lift in height and provide good drainage.
And decouple your stone from the slab.
Then you have far less to make up, and be able to use a ptb adhesive instead.
It's Just another idea.

Hi 3_fall
What sort of cost dose the ditra drain8 work out per a meter !

 

[J Sid]

anyone tried these sort of thing?

Adjustable Self-Leveling Floor Pedestal SE Silent - http://www.pedestal-eternoivica.com/en/products/adjustable-self-leveling-floor-pedestal-se-silent-with-bi-material-head

 

[LM]

Hi 3_fall
What sort of cost dose the ditra drain8 work out per a meter !

A 12.5mtr roll of DITRA-DRAIN 8 is £16.63 net per m2 full retail

 

[Old Mod]

View attachment 85376

anyone tried these sort of thing?

Adjustable Self-Leveling Floor Pedestal SE Silent - http://www.pedestal-eternoivica.com/en/products/adjustable-self-leveling-floor-pedestal-se-silent-with-bi-material-head

How did you find those Julian?
Got a use in mind?

 

[J Sid]

twitter, plus had ad on this site. You the ones at bottom of page
Tile Pedestals | Paving Support Pedestals | Tiling Accessories - https://www.tilefixdirect.com/category/pedestals

 

[J Sid]

go on then, do tell