With the advancement of winter, Building Tempered Glass (especially outdoor) is two thousandth more than the previous season, and tempered glass is a kind of prestressed glass. There is compressive stress about the surface and tensile tension inside. Generally, the glass is a state of equilibrium of force. However, there are few impurities in the glass raw material.
As time goes on, and the temperature inside winter is large in daytime and night, a phase change occurs as well as volume increases. In special, the temperature inside your house is high, and the temperature outside the home is low. It is usually the temperature outside the glass about the window, which in turn destroys the compressive stress as well as tensile stress balance in the tempered glass, and smashes itself. It is called self-explosion in the market.
In order to prevent the rupture of Ultra Large
insulated glass or glass inside the northeast, they are separated by two layers door and windows.