Building a DIY garden patio, with Indian sandstone and wooden sleepers

[@LAproductions]

What mix did you used, to embed the sandstone in?

[@duke_hammersmith_iii]

Hi,
The sub-base layer of mortar mix is cement and concrete/sharp sand, at a ratio of around 4:1 or 5:1.
Then, to get the slab to bond with the mortar, mix 1 part cement to 1 part SBR fluid and apply to the back of the slab using a paint brush. This is called a "priming slurry". You can buy a dedicated slurry product, but cement + SBR will do the same job.

[@LAproductions]

@@duke_hammersmith_iii Thanks!