Commercial Garage Doors - Insulated Sectional INTELLICORE POLYURETHANE Warmer. Quieter. Stronger. Climate control. Reliability. Durability. Our premier Intellicore® insulated steel doors have it all, providing excellent temperature control, energy efficiency and long lasting service for a wide range of applications, such as firehouses, warehouses, and municipal buildings. Click here for more information. POLYSTYRENE These high quality, polystyrene insulated steel doors provide energy efficiency and long service under demanding conditions. Ideal for use in municipal buildings, warehouses and shipping dock applications, or where value and energy efficiency is needed. Click here for more information. ECONOMY Premium-duty 20 guage and heavy-duty 24 gauge steel insulated doors are for most commercial and industrial applications. 25 gauge insulated steel doors are an alternative for applications requiring economy and reliability in a lighter gauge commercial door. Click here for more information. A Great start to long lasting door solutions. . . For areas of high traffic and the possibility of the door being struck, a break away bottom section is available. This section can be hit and reset in seconds maintaining the function of the door and the integrity of the building.