About Williams Door Company, Inc Williams Overhead Door Sales, Inc. more commonly known as Williams Door Co., was founded in 1971. Williams Door Co. began in a small garage, but with strong work ethics, perseverance and enthusiasm has evolved into one of the largest overhead garage door dealers in the southeast. Providing a complete line of Clopay residential garage doors, LiftMaster residential door openers, Clopay commercial sectional overhead doors, Asta rolling sheet and mini warehouse doors, Cookson rolling service doors, LiftMaster commercial door opening devices and a wide variety of accessories and parts, Williams Door services it's customers from two different locations.