Cultured Stone - Mortar or Thinset?
The type of mortar they used came in large bags and was mixed with sand. I bought it for them from concrete materials, so I know it is a mortar like you lay block and brick with. I don't know if you have concrete materials or not, but here (ky) they sell cultured stone and can easily tell you which type of mortar, I think mine called for type "N" but again, it's up to the manufacturer. One thing to keep in mind, if the stone isn't set correctly, it will fall off when it gets damp, so make sure you use the right type and grout it correctly so you don't leave spaces for water to get behind it. My experience has been is that thinset is mostly used for tile, not stone. You may have to use a form of exterior thinset to lay the tiles on top, but I wouldn,t use it on the stone veneer. See if you can find a website for cultured stone and installation instructions.