Service Door Industries is a Canadian Door manufacturer specializing in rolling steel, sectional door, fabric door and custom ... manufacturing as well as distribution of gate automation, access control and safety products. SDI was founded in 1988 and has grown substantially over the last 25 years by striving to keep moving forward with the latest technology and best quality products. SDI has recently expanded into a third building which includes a larger customer service area, training room, show room, aluminum door manufacturing and automation products. read more