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All of the windows that we install are Energy Star Certified for Southern Ontario (ratings vary across Canada by climate zone) and are approved by the CSA, WDMA (Window and Door Manufacturers Association) and AAMA (American Architectural Manufacturers Association).

In our experience, most customers are content to install windows with the same style that are currently in place. However, not everybody is as clever as us so if we find a compelling reason to change the style we will tell you and also tell you why.

We offer a number of lines of windows that will complement the decor of your home from the more classic designs that offer a more traditional look in a technologically advanced unit to a more contemporary, minimalist look.

Additionally, we can provide you with a totally custom solution for bay window installs, bow window installs as well as an infinite variety of architectural needs.

Great Windows
20-15 Heritage Road
Markham ON
L3P 3T1

416-639-1837

Feel free to call us at any one of our locations

  • Markham
  • Ajax
  • Pickering
  • Whitby
  • Richmond Hill

Related Links

  • Entry Doors
  • Great Windows
  • Our Offerings
    • Windows
    • Entry Doors
    • French/Garden Doors
  • Our Services
    • Window Installation Service
    • Window Supplier
    • Door Supplier
    • PVC Windows Supplier
  • About Us
  • Call Us
    • Ajax
    • Markham
    • Pickering
    • Richmond Hill
    • Whitby
  • Privacy Policy
  • Blog
    • All
    • PVC Window Supplier
    • Window Supplier
    • Window Installation Service
    • Door Supplier
  • Window and Door Types
    • Double Hung Window
    • Picture Window
    • Casement Window
    • Awning Window
    • Slider Window
    • Bay Window
    • Bow Window
    • Garden Window
    • Round Top Window
    • Hopper Window
    • Special Shape Window
    • Replacement Front Door
    • Replacement Sliding Door