Hello. I'm new to this website, and my interest is uromastyx and armadillo lizards, but close enough. I wanted to use roofing tiles as hides, but I'm not sure if the ones made of concrete are reptile/lizard safe. Clay tiles are hard to find but everyone has concrete. My concern is the alkalinity of concrete roof tiles, especially new ones that are not well weathered. Does anyone know if new concrete roof tiles are safe and will not cause skin burns due to alkalinity? Thanks for your help.