Grainstone is a stylish collection of porcelain stone tiles. Avaiblible in a fine or rough grain aethestic surface. A rich assortment of finishes, sizes and colours, to ensure the right design solution is always available for every type of setting, both indoor and outdoor.20mm is perfect of outdoor useage. It’s thickness guaratees excellent resistance. It is easy to lay on grass, sand and gravel and can be used for industrial and commercial driveways. Ideal for access ramps and garages. Plus, the creation of cavity floors.