Grade 0: Tiles in this class are not recommended for use on floors.
Grade 1: Floor coverings in areas that are walked on essentially with soft soled footwear or bare feet without scratching dirt (e.g. residential bathrooms and bedrooms without direct access from the outside).
Grade 2: Floor coverings in areas that are walked on by soft soled or normal footwear with, at the most, occasional small amounts of scratching dirt (e.g. rooms in living areas of homes but with the exception of kitchens, entrances, and other rooms which may have a lot of traffic). This does not apply to adnormal footwear (i.e. hobnailed boots).
Grade 3: Floor coverings in areas that, with normal footwear, are walked on more often with small amounts of scratching dirt (e.g. residential kitchens, halls, corridors, balconies, loggias, and terraces). This does not apply to adnormal footwear (i.e. hobnailed boots).
Grade 4: Floor coverings that are walked on by regular traffic with some scratching dirt so that the conditions are more severe than Grade 3 (e.g. entrances, commercial kitchens, hotel, exhibition and sales rooms.)
Grade 5: Floor coverings that are subject to severe pedestrian traffic over sustained periods with some scratching dirt, so that the conditions are the most severe for which floor tiles may be suitable (e.g. public areas such as shopping centres, airport concourses, hotel foyers, public walkways and industrial applications).