Fixing slate tiles outdoors on a concrete base

Hello Jordan

You can put slate tiles almost anywhere, but you must take in to consideration the weather. If in the winter the temperature falls below say -20 then there is a slight possibility that the slate tiles could crack due to extreme temperature changes.

On the whole though if you use a recommended flexible tile adhesive then this should compensate for any slight expansion or contraction due to changes in temperature.

We would also recommend you use a flexible grout & ensure all the grout lines are well filled. Outdoor concreted areas are also recommended to have a suitable waterproof membrane installed.