What is Double glazier Burgess Hill ? The term "double glazing" describes a window with two glass panes. The double-glazed sealed unit, also referred to as an insulated glass unit (IGU), is the major part of the window and is housed in a frame made of uPVC, aluminium, or wood.
A spacer bar separates two sheets of glass to generate an air gap that is then filled with an insulating gas to form the IGU. similar to a sandwich made with glass bread and air as the filling.