Double glazing refers to the process of insulating a room by turning one or more glass panes into an airtight barrier to stop heat exchange. Insulating glass is made up of either two or several glass window panes attached either by a gap or air-filled cavity to the surface of a building envelope to prevent heat transfer through a specific part of that building envelope. Heat can neither enter nor exit a sealed enclosure, so the heat will not be transferred from the interior of a building to the exterior. In most homes, double glazing is recommended for commercial and industrial buildings where high temperatures are to be avoided, because in those settings, even the smallest gap in the seal can cause increased heat loss. Moreover, installing and maintaining this type of window can help improve energy efficiency.
A typical double glazing window consists of a thin piece of glass attached at both the top and bottom of the frame. The glass is then affixed to frames at both the top and bottom using either screws or nails. This design allows some air space between the glazing and the frames. As a result, the inside temperature of the room will remain constant during the day as well as at night. The type of glass used in these structures depends on the manufacturer and the application.
Many modern double glazed windows are constructed from UPVC, or Unplasticized polyvinyl chloride, which is a high-quality resins used in virtually all fields of industry. UPVC is resistant to rot, mildew, warping, shrinkage, fogging, condensation and scratching. In addition, it is highly durable, capable of withstanding temperatures of up to extreme levels (up to +450 degrees Fahrenheit). Other benefits of double glazed windows include reduced energy costs, reduced noise and increased security. In most cases, they require low maintenance and come with a long warranty, both of which translate into substantial savings over traditional wooden frames.