Constructed of a 24-gauge steel or thinner steel skin with no insulation. Offers basic protection and security.
Steel – Insulation
Constructed of a 24-gauge steel or thinner steel skin. Fitted with a layer of expanded polystyrene board insulation and a thin, protective vinyl back cover. Insulation increases energy-efficiency and soundproofing and adds greater structural integrity for quieter operation. Offers good protection and security.