Insulating glass (IG) ,

also called IGU (insulating glass unit) is an energy-saving glass. 

Insulated glass was invented by an American in 1865. It is a new type of building material with good heat insulation, sound insulation, beautiful appearance, and can reduce the weight of buildings.

IGU Consists of two or more panes of glass. 

Insulating glass separates two pieces of glass by air (or inert gas), which can reduce the surface heat transfer, making it widely used in the envelope structure of modern buildings.

South Star Glass has developed TPG (ThermoPlastic space Glass) with better performance on the basis of  insulating glass. It is an improved IGU with warm edge. The warm edge uses thermoplastic material to make heat transfer lower. Click to view more information about TPG.


1.  energy saving :

The U value of single glass pane is about 5.7, while the U value of insulating glass can be reduced to as low as 1.4. The heat transfer value is greatly reduced. IGU isolates the heats of indoor and outdoor , thereby saving the energy.


2.Improve the indoor environment

  Insulating glass can block part of the energy that the sun sends into the room, so it can prevent the discomfort caused by radiant heat and reduce the dizziness caused by the evening sun.


3. Reduce the frost

If the temperature difference between indoor and outdoor is too large, and the single layer of glass will frost. Due to  the inner glass of IGU is in contact with the indoor air is affected by the air spacer, even if the outer layer is very low, condensation will not occur on the glass surface causing by the temperature difference