For a tile to be suitable for external use in Scotland it needs to be frost proof. A frost proof tile
Does not absorb water and is fully vitrified. This quality has been traditionally been produced in the manufacture of extruded quarry tiles. The modern day equivalent is a “porcelain” tile.
At The Ceramic Tile Warehouse we stock both options. The tiles suitable for external use are clearly labeled on the displays to make your choice informed and easy. Most designs have a structured top face to provide an anti-slip surface and come in a range of sizes and colours.