Door Specialty Company Overhead Doors is a locally owned business with locations in Mt. Zion, IL and Champaign, IL. We offer specialized service on all types of garage doors, garage door openers, and dock equipment. Fire doors, bifold doors, bug doors, agricultural oversized doors, high speed rolling doors, and a wide selection of residential doors. Door Specialty Co provides installation and service for most of Central Illinois. Our Technicians are trained on all brands and models of overhead doors. Call us for convenient and reliable repairs for all your door and opener problems. Call us today we service all brands and models of doors and openers. We carry a wide supply of parts too.