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High-quality Custom Window Creation in St. Catharines and the Niagara Region

Fleming Windows & Mirrors Limited offers a wide range of custom-designed windows to add a touch of charm to your home. We specialize in custom window creation in St. Catharines and the Niagara Region. Our professional team works with experienced designers to transform your house into a visual masterpiece.

We Are the Go To Shop for Window Repairs, Hardware and Glass Replacement!

Easy-to-clean, Energy-efficient and Low Maintenance

We sell windows manufactured using quality extruded vinyl, cut and welded to standards, and some even have a tilt-in function to allow easy cleaning.


You can trust us as we offer windows with:

  • ‘ENERGY STAR®’ rating

  • Double and triple sets of weatherstripping

  • Low E glass, warm edge, and argon gas filled technology

  • Our windows have been tested and met the new NAFS 2014 (North American Fenestration Standards)

Our Products

As a reliable provider of custom products, we offer several window options:

Casement Windows

These energy-rated operating windows are available in various colours, accessories and glass options. They come with an interior removable full screen and allow complete ventilation.


These windows open outward with a top hinge instead of a side hinge. They offer protection from the weather and allow great ventilation.

Fixed Picture Windows

Available in large sizes and several shapes, these windows have high energy ratings as they allow natural light into the room.

Single/Double Hung Windows

These windows are ideal for walkways or patios. They allow proper ventilation. Single-hung windows have a single operating lower sash, while double-hung windows have a double operating sash.

Single/Double Horizontal Slider Windows

These windows are economical and feature easy cleaning. Slider windows open with a sash sliding right or left, and many people find them easier to open than casement windows.

Custom Windows for Heritage Homes

When it comes to your heritage home, window installation is best left to professionals. If you want to maintain the architectural integrity of your heritage home, we can design custom windows and ensure that they are properly installed to optimize your energy savings.

Custom Windows

Casement window


Awning window


Double Hung window

Double Hung

Single Hung window

Single Hung

Double Tilt Slider window

Double Tilt Slider

Single Tilt Slider window

Single Tilt Slider

Double Lift-Out Slider window

Double Lift-Out Slider

Single Lift-Out Slider window

Single Lift-Out Slider

Bay window


Bow window


Ask Us for a Quote

Talk to our custom window and door installers in St. Catharines and the Niagara Region.

Get in Touch

Contact Information


Fleming Windows & Mirrors Limited

29 Maywood Avenue

St. Catharines, ON L2R 1C5






  • Niagara Falls

  • Niagara-on-the-Lake

  • Welland

  • Beamsville

  • Thorold

  • Vineland

  • Grimsby

  • Fonthill

  • Ridgeway

  • Fort Erie

  • Port Colborne

  • Niagara Region

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