The Gallery® Collection three-layer construction provides exceptional strength, energy efficiency and dent resistance as well as a beautiful carriage house appearance. The 2″ or 1-3/8″ thickness of Intellicore® polyurethane or bonded polystyrene insulation and thermal break makes these doors heat and cold resistant while the tongue-and-groove joint helps seal out wind, rain and snow. Available in short and long panels with multiple window options, the three-layer Gallery® Collection is virtually maintenance-free, so the first fabulous impression becomes a lasting impression.