I had this professionally installed, and three years after, it literally exploded into little shards of glass, and some little splinters had enough force to embed into the paint in the wall, 6 inches away. This might be tempered glass, which i thought would peel off like a car windshield, but it was tiny little pieces that you could inhale if you aren't careful. I can not believe this! this was in the summer, in a basement , around 77 degrees fahrenheit. nothing unusual, except that nobody was home for two days, and we came back to glass everywhere in the bathroom.