In architectural glazing applications, the use of heat-treated glass reduces the breakage potential due to stress induced by temperature change and strain from wind and snow loads considerably. In most cases, safety glazing is required by applicable building codes, and fully tempered or laminated heat-strengthened glass often is specified.
The most commonly used type of safety glass is tempered glass. It is made by heating presized glass panels to approximately 1200°F (650°C), then rapidly cooling them through quench. The result of using a fast quench is a glass panel with the surfaces and edges in compression and the center of the glass in tension.