With sales headquarters in Whitby, Ontario, Superior Garage Doors services Markham, Scarborough, Durham Region (including Ajax, Pickering, Whitby, Oshawa, Port Perry, Beaverton, Courtice, Clarington, Bowmanville, Newcastle ), City of Kawartha Lakes ( including Lindsay, Fenelon Falls, Bobcaygeon, and Coboconk), Cobourg and Port Hope Markham- 905-944-6000 Lindsay - 705-878-1151 Coburg - 905-885-0059 At Superior we believe that a quality product, installed with pride, sold at a fair price and backed up with a dedication to excellence in service is what consumers are looking for. Residential, Commercial & Industrial Doors, Sales, Installation, Repair