Double-glazed
Insulating glass was invented by the Americans in 1865. It is a new type of building material that has good heat insulation, sound insulation, beauty and application, and can reduce the weight of buildings.
It is made of two or three pieces of glass, using a high-strength and high-airtight composite adhesive to bond the glass pieces to an aluminum alloy frame containing a desiccant to make high-efficiency sound-insulating and heat-insulating glass.