Clera Windows + Doors has been manufacturing and installing vinyl windows and doors since 1978. Clera Windows is one of Canada's largest, oldest and most reputable window and door manufacturers, serving customers in Toronto, Ottawa and throughout all of Ontario. Clera windows takes full responsibility for your entire project - from initial estimate to the manufacturing of your custom made replacement windows and exterior doors to their installation and after-sales service. With more than 30 sales and installation offices throughout Ontario, and its head office and manufacturing facility located in Concord, Ontario, Clera Windows + Doors has improved more than 200,000 homes. Canada's Best 50 Privately Managed Companies We continue to be mindful of the values that helped us to earn these credentials, a true and total commitment to customer satisfaction. We are a Canadian company that has been manufacturing and installing Canadian-made products for nearly 35 years and our overriding goal is to make your renovation project a complete success. When you order custom windows and doors from Clera, you know you're in good hands.