Insulating Glass (IG), also known as double pane, triple pane or double/triple glazing, consists of two or three panes of glass
separated by a vacuum or gas-filled space to reduce heat transfer. IGs can be made using regular (annealed), tempered, or laminated
glass and can be made in thicknesses starting at 3/8" thick. They are generally made using: Single Strength (SSB), 1/8", 5/32", 3/16", 1/4",
or 3/16" glass, though other options are available.