In Australian commercial construction projects, insulating glass, often referred to as insulated glass units (IGUs) or double glazing, consists of two or more glass panes separated by a spacer and sealed to create a single unit with an air or gas-filled space between the panes. This design enhances thermal insulation by reducing heat transfer between the interior and exterior environments, thereby improving energy efficiency in buildings. The space between the glass panes can be filled with air or inert gases like argon or krypton to further enhance insulation properties. Insulating glass is commonly used in windows, facades, and curtain walls in commercial buildings to improve thermal comfort, reduce energy costs, and minimize noise transmission. Additionally, it can be combined with other glass technologies, such as low-emissivity (low-E) coatings, to further enhance its performance.

In addition to its energy-saving and noise-reducing benefits, insulating glass can also provide better thermal comfort for occupants. The space between the panes of glass helps to prevent condensation from forming on the inside of the window, reducing the risk of mold and mildew growth.

Insulating glass is available in a range of styles and configurations, including clear, tinted, and low-emissivity (low-E) glass. Low-E glass is coated with a thin layer of metal or metal oxide that reflects heat back into the building, further improving energy efficiency.

Insulating glass is typically used in commercial construction projects, such as offices, retail spaces, and hotels. It can be used in both new construction and retrofit projects, and can be installed in a range of window and door systems.