While there is no visible difference in the appearance of a floor or wall tile that can distinguish the two, the friction level will let you know if a tile is suitable for floor application. Tile COF, which is a friction rating, ranges from 0.3 to 0.6. Tiles with COF of 0.5 or 0.6 are recommended for the floor, but can be applied on walls as well. Within Tile, we carry 432 backsplash tiles, 432 wall tiles, and 68 tiles for your floor.