With the beginning of winter, Building Tempered Glass (especially outdoor) is two thousandth over the previous season, and tempered glass is an prestressed glass. There is compressive stress on the surface and tensile anxiety inside. Generally, the glass is due to a state of equilibrium of force. However, there are hardly any impurities in the glass raw material.
As time moves, and the temperature with winter is large during the day and night, a phase change occurs plus the volume increases. In particular, the temperature inside the property is high, and the temperature outside the house is low. It is usually the temperature outside the double glass on the window, which in turn destroys the compressive stress and also tensile stress balance belonging to the tempered glass, and breaks itself. It is called self-explosion construction business.
In order to prevent the rupture of Ultra Large Tempered Glass or glass while in the northeast, they are separated by two layers door and windows.