All of the materials we use at PES are marine-grade and meet or exceed the material requirements of the Department of Transportation (DOT) and the American National Standards (ANSI) Code for safety glazing materials for motor vehicles operating on land and highways, including luminous transmittance, chemical resistance, flammability and weathering. Our materials and hardware are also used on the finest boats, made to withstand the elements. When properly maintained our enclosure will protect your porch or patio, maintain a snug fit, a clear view, and many years of enjoyment.