External Tiling - Tile Advice

[Stephen]

I’ve been asked to tile a concrete block wall outside that is currently wet due to the dreadful weather...
The tiles are natural slate in strips that interlock and are glued together .
I’m thinking wait until the block work is dry and prime before tiling with a s2 adhesive
The other side of the wall will be infilled after tiling with stone and topped with soil
What’s the best primer to use as there is a good chance moisture could hold in the blocks after in filling as don’t want the tiles to come off at a later date ...Any ideas or info would be appreciated
Thanks

 

[Dan]

Breeze blocks?

 

[Stephen]

Breeze blocks?

Concrete

 

[Stephen]

Concrete

It’s a retaining wall to be infilled with stone and soil I’m tiling the front face and top of the blocks

 

[Dan]

Got a picture?

 

[Stephen]

It’s a retaining wall to be infilled with stone and soil I’m tiling the front face and top of the blocks

Basically the wall has a cavity

 

[Stephen]

Got a picture?

No unfortunately not but it’s 3 ft high basically how you would build a house in concrete blocks with a cavity be a house would be rendered this is been tiled

 

[Dave]

Wrong time of the year for exterior tiling. A C2 adhesive will suffice and solid bed to avoid voids that can create problems with freeze/thaw.

 

[Stephen]

Wrong time of the year for exterior tiling. A C2 adhesive will suffice and solid bed to avoid voids that can create problems with freeze/thaw.

Would you prime the bocks too? What’s the difference between a c2 and s2 ? As always use a s2 or s1

 

[Dave]

Would you prime the bocks too? What’s the difference between a c2 and s2 ? As always use a s2 or s1

Basically more deformable..
As for the blocks, burn the adhesive into the blocks creating a good key. Priming won’t hurt 👍