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Building Chemicals, Mixtures & Insulation

A window is an opening in a wall, door, roof or vehicle that allows the passage of light, sound, and/or air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame[1] in the opening; the sash and frame are also referred to as a window.[2] Many glazed windows may be opened, to allow ventilation, or closed, to exclude inclement weather. Windows often have a latch or similar mechanism to lock the window shut or to hold it open by various amounts.