Commercial Garage Doors need to be fully functional and able to withstand daily operations in the toughest of industrial environments. For commercial applications, toughness is the name of the game. Gandert Door Company strives to offer the highest quality products and service to our clients, and that is why we proudly offer a wide selection of insulated and non-insulated commercial upward acting doors from CHI Doors to fit your exact specifications. Because commercial-use doors see a lot of action, they need to be durable and long-lasting. CHI’s line of tough, heavy-duty commercial doors are built to withstand a higher volume of operation, so you can be sure they’ll be around for a long time. For most heavy duty doors for the commercial or industrial user, the rolling steel is the answer. With the genuine rolling steel line, we offer the most respected rolling steel doors available, engineered for durability and smooth operation. Our line of sectional steel and insulated steel prod