When it comes to windows and doors,
Toronto’s First Choice is Ostaco.

To avoid draughts and high energy bills in the cold Canadian winter, you need expert help! If you need windows and doors, turn to Ostaco. Quietly and effectively, we have been manufacturing and installing beautiful, high quality doors and windows for Toronto homeowners since 1981.

We are the go-to windows and doors company in Toronto because we offer it all. Prompt delivery, expert installation, CSA Certification, Energy Star efficiency ratings and superior manufacturing standards... all Ostaco hallmarks. Our customers value our endless customization options as much as our superb energy efficiency. That's why these demanding homeowners have spoken highly of Ostaco to friends and neighbours for 30 years.

Ostaco products are certified and tested by the National Fenestration Rating Council (NFRC), and have received many awards.