Wind and Heat!
Toughened Glass is a great solution for most applications however, when the glass is likely to be exposed to greater wind loads or higher thermal stress, it is widely recommended to use Heat Strengthened Glass.
The heat strengthening process increases the mechanical and thermal strength of the glass, increasing its resistance and making it twice as tough as Tempered Glass.
The process is similar to that of the traditional process of glass tempering but the cooling cycle is less rapid; the heating temperature remains the same for both processes. Due to the relatively lower rate of cooling during the heat strengthening process, Heat Strengthened Glass develops less stress as compared to fully Tempered Glass.