Insulated glazing facts for kids
Insulated glazing unit (commonly referred to as IGU) is a piece of glazing consisting of two or more layers (lites) of glazing separated by a spacer along the edge and sealed to create a hermetically sealed air space between the layers. This provides better heat and sound insulation than standard single-glazed windows.
Insulating windows are usually double paned and are also referred to as "double glazing" but windows with triple panes or more, "triple glazing" are sometimes seen in very cold areas. Insulated glazing is framed in a sash or frame as if it were a very thick piece of glass.
IGU made of glass is called insulated glass (which refers to heat insulation, not sound). A more technically correct term, though, is insulating glass, since the glass itself has no insulative properties. It is actually the air space between the glass layers (lites) that provides the insulative qualities.
Images for kids
A sectioned diagram of a fixed insulating glass unit (IGU), indicating the numbering convention used in this article. Surface #1 is facing outside, Surface #2 is the inside surface of the exterior pane, Surface #3 is the outside surface of the interior pane, and Surface #4 is the inside surface of interior pane. The window frame is labelled #5, a spacer is indicated as #6, seals are shown in red (#7), the internal reveal is on the right hand side (#8) and the exterior windowsill on the left (#9)
Insulated glazing Facts for Kids. Kiddle Encyclopedia.