Exterior patio help

[Dumbo]

Dural doesn't drain so you can get issues with frost lift.
Adped system tiles need to be 20 mm . In this instance your spacing would probably have to be 450 .

 

[Italy]

@JulianSidney

http://products.kerakoll.com/gestione/immagini/prodotti/Green-Pro%20UK%202018.pdf

ready, I trust only the technical sheets
the thickness is not specified, but check the wetting yes
and avoid high adhesive thicknesses.
a few times I used it, I used 7 / 8mm.
on the substrate of sand and cement quite rough.

 

[J Sid]

Bal

Schluter say

There is no maximum limit to the tile/stone thickness that can be installed above Schlüter®-DITRA-DRAIN, providing the thin bed adhesive method is used to bond the tile/stone covering. The minimum tile/stonethickness above Schlüter®-DITRA-DRAIN is 8 mm.

With the thin bed adhesive method, the maximum adhesive bed above Schlüter®-DITRA-DRAIN is 10 mm.

 

[Just Rizzle]

I'm with harry , is nobody concerned about frost lift . Ditra drain 8 is my favoured approach
Just done a patio with adpeds but it is a 25 mm build up approx .

yes frost could be a problem in winter as bal flex bone is a non adhered membrain and breathable in my view most suited but will check with rep.
you can always add frost proofer to your addy

 

[Dumbo]

Frost lift is where you get a pocket of water that freezes and expands . No amount of frost proofer is going to help that.

 

[Unused Account 1]

Ive done two 150 metre outside areas on a screed,just primed and tiled .,that was 2 years ago ,no problems

 

[Joshjupp]

Ive done two 150 metre outside areas on a screed,just primed and tiled .,that was 2 years ago ,no problems

Same here we just primed and tiled good solid bed of adhesive no issues either the base had been down a long time no cracking so just tiled straight to it