ThermoMark™ Model 530 is the strongest and most thermally efficient door in the Wayne Dalton product line-up. Premium 3” thick foamed-in-place polyurethane insulation features continuous steel strips for flexibility in hinge placement. The preferred choice for large openings where thermal performance and durability are essential. ThermoMark™ insulated doors help to minimize energy costs and provide year-round comfort and security for your building. ThermoMark™ Model 530 is designed to deliver optimal performance in commercial and industrial applications where climate control, durability, and less maintenance are the primary concerns.