StormGlass™ In independent testing, StormGlass™ met test requirements for large glass sizes up to 50 square feet. That means the freedom to design larger glazed openings while meeting the most stringent building codes for hurricane resistance. StormGlass™ has even been tested in four-sided structural glazed. Capabilities Oldcastle BuildingEnvelope® supplies all the main types of laminated glass used for hurricane-resistant applications. See our Product Performance chart. Usually, the laminate is made up of two pieces of glass of the same thickness; however, the two pieces of glass may be annealed, heat-strengthened or tempered, depending on the system in which it was tested.