Double-glazed glass, often referred to as an Insulated Glass Unit (IGU), is a common construction element designed to significantly improve a building's thermal performance. This specialized glass assembly consists of two individual panes of glass separated by a measured space, known as the cavity. At the core of the assembly is the spacer bar, which maintains the distance between the two panes. It. The double glazed unit, which slots into a window frame, is made up of a number of components. The cavity – the gap formed between the component parts this can be filled with air or argon gas. Please attach any plans or photos you have. PDF, PNG or JPG under 5mb file size accepted. This entire assembly then fits into a frame that holds everything in place and connects to. Double-hung and casement windows feature distinct components like sashes, locks, grilles, and weatherstripping that impact both functionality and aesthetics.