Insulated door is a type of door designed with materials that provide thermal insulation properties, helping to regulate temperature and improve energy efficiency in buildings. Typically used in both residential and commercial settings, insulated doors feature layers of materials such as foam, fiberglass, or rigid insulation sandwiched between durable outer layers. This construction helps to prevent heat transfer between indoor and outdoor spaces, keeping interiors cooler in summer and warmer in winter. Insulated doors are commonly used for exterior entryways, garages, and industrial applications where maintaining consistent indoor temperatures is important for comfort, energy savings, and environmental control.