French Shower Doors Cup shower doors have come quite a distance since the 50’s and sixties as far as how they are made and just how they look. Today’s glass bath doors are made with tempered cup. What is tempered glass? Tempered glass means that the a glass has been manufactures with a “heat treatment” which happens when the actual glass is removed from the particular furnace.
French Shower Doors The main reason why it is tempered is because it dramatically boosts the overall strength. For example , Tempered glass is four occasions stronger than regular wine glass and can resist temperature variations up to 300 degrees without having cracking.