Laminated Glass Multiple layers of glass with interlayers of polyvinyl butyral connecting them. Traditionally, thickness have been chosen based on pane size and wind pressure using design tables developed by the glass industry. HS glass is approximately 2 to 3 times stronger than AN glass. At freezing temperatures, the adhesive is very effective and the layers act as a single unit. Breaks in shards, so it is prohibited from use in doors and overhead glazing.
Laminated glass has better resistance to fallout, as does film coated glass.