Double Glazing Glass refers to a window that consists of two panes of glass. The meaning of double glazing might be quite evident from the name. However, it is more than just double panes of glass on a window or door. In fact, double glazing is made up of the frame and the hardware in addition to the sealed glass unit. It is a low-emissivity glass (known as low E glass) that has a transparent metallic layer inside it. This layer helps to reflect the heat back into the house. Double Glazing Glass is made for use in the various applications as per the need.