We were asked to install 20mm porc at the far end of a pool on peds, I refused as when you read the small print of the tiles they have every angle covered for liability. Things like should a tile suffer any point impact now or in the future it must be replaced even if there are no visible signs of damage. So now we have to put a sentry duty 24/7 to keep guard. Imagine the injury if you naked leg did go through.
But I am old and the cup is half empty. Always