Double Glazing

Double Glazing, insulated glazing, double glass, triple glass, double pane, triple pane and triple glazing are different words for the same thing but with possible slight variation. To put it in simple terms, they are double or triple window panes separated by a "spacer"to seal the multiple glass pieces and keep gas space between them. The Glass pieces are separated to by air or gas filled space to decrease the heat and noise from transferring across.

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A sectioned diagram of a fixed Insulated Glazed 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 inter… — A sectioned diagram of a fixed Insulated Glazed 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)