Are rubber patio tiles classified as R10?

Patio tiles made from rubber granules achieve slip resistance class R10 under BS EN 16165. The test uses standard test footwear on an oil-wetted ramp, in accordance with Annex B of BS EN 16165 (formerly DIN 51130). Depending on the product range, the mean overall acceptance angle lies between 12 and 17 degrees, so every range achieves R10. The tiles are described as slip-resistant rather than slip-proof because the classification applies only to the conditions tested.

Most of this slip resistance comes from hysteresis friction: the sole of the shoe deforms as it moulds around the individual rubber granules, and it is that deformation that generates most of the friction. Outdoors in rain, the permeable surface also helps, as rainwater drains through the tiles and a continuous film of water does not normally build up. The oil ramp test does not capture this effect.

The tiles have not been rated for barefoot areas under Annex A of BS EN 16165 (classes A, B or C), so no slip resistance rating can be given for barefoot use. Wet leaves, algae, ice, frost, compacted snow, oil, grease and cleaning residues can reduce slip resistance or remove it altogether. Keep the surface clear, sweep it and remove any oil promptly. Slip resistance may also decline over the service life, as abrasion can gradually smooth the surface of the granules.