R ratings, what they mean
R ratings (R9 to R13) are derived from a ramp test under contaminated conditions. R9 is essentially non-slip-rated and unsuitable for any wet area. R10 is the minimum for general commercial wet zones (entrances, hospitality wet areas, salons). R11 is the spec for commercial kitchens, care home wet rooms, school changing areas. R12 and R13 are heavy industrial, food production, abattoirs, oil/grease environments.

