IN ACCORDANCE WITH BGR 181
Working rooms and areas are classified according to five assessment groups on the basis of the extent of the risk of slipping. Coverings belonging to group R9 are subject to the lowest requirements, while the most stringent requirements apply to group R13 coverings. Working rooms + areas where a displacement space is necessary under the tread level in order to discharge substances that are particularly conductive to slipping are indicated by ‘V’ in conjunction with a number specifying the minimum volume of the displacement space. V ratings are particularly important for areas where water is likely to be present, e.g. swimming pools, shower areas, reception areas and outdoor areas etc. V ratings are classified as V0 being the lowest and V10 as the highest.