Using Slate Tiles Inside To Match Outside
Hello Caroline
We don't recommend using the same thickness tiles outside as you would inside. From previous experience using 10mm tiles externally they can become cracked and lift due to there thickness.
We would recommend using the slate pavers for external use. All the Brazilian black slate tiles both internal and external slate pavers will match in colour, they are supplied from the same quarry.
We do stock a range of matching sizes in both types so its all down to your personal preference.