Spandrel glass is the opaque glass that conceals structural building components such as columns, floors, HVAC systems, vents, electrical wiring and plumbing, preventing these from being visible from the exterior of the building. Curtain wall and structurally glazed designs often require the use of spandrel glass to achieve an architect’s vision of the finished project. Typically located between vision glasses on each floor of a building, spandrel glass can be either complementary or contrasting in color when compared to the appearance of the vision glass.