Canadian-Made Vinyl Windows & Doors
Our Partner for Energy-Efficient Vinyl Windows & Doors
Grace Windows & Doors is a proud authorized dealer for Ostaco, one of Canada's most respected manufacturers of vinyl windows and doors. We carry Ostaco — including the premium Frank by Ostaco line — because their products deliver the energy efficiency, durability, and value our clients depend on, backed by manufacturing right here in Ontario.
Energy Efficiency
ENERGY STAR-certified windows engineered for Canada's climate, with high-performance glass and insulated frames that help lower heating and cooling costs year-round.
Canadian Craftsmanship
Locally manufactured in Ontario with a wide range of styles, colours, and configurations — so every window and door is built to fit your project and finished to last.
Our Projects
Explore a selection of completed projects featuring Ostaco windows and doors — installed and serviced by our team in homes across the GTA and Muskoka, and built to perform for years to come.
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Let’s Start Your Project
Whether you’re planning a new build, renovation, or replacement, our team is here to support your project with expert guidance & tailored solutions.
Phone: 905.660.0271 | Email: [email protected]
Speak with Our Team