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Bay Windows

The curves of bow windows make them the perfect replacement windows for Toronto homeowners looking to add some class. A bow window replacement offers beauty, extra space, and better lighting to create a wonderful, unobstructed view from your living room or master bedroom.

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Bay Windows Toronto

Bow windows from Thermo-Bilt, Toronto’s window replacement company, are manufactured with Cardinal Glass, protecting your windows from common and expensive seal failures. Seal failures lead to uncomfortable room temperatures, and even more uncomfortable energy bill costs. At an industry-low 0.2% failure rate over the past 20 years, these are some of the best replacement bow windows in the GTA in terms of value and thermal performance.

Elegant and Economical Bay Replacement Windows

  • Comprised of 3 individual windows jutting out at a 30°, 45°, or 90° angles
  • Panels can be stationary, functional, or a combination of the two, allowing for superior ventilation
  • Can be installed with head and seat boards

Contact us today to get a free quote on bay window replacement!

Elegant and Economical Bay Replacement Windows

  • Comprised of 3 individual windows jutting out at a 30°, 45°, or 90° angles
  • Panels can be stationary, functional, or a combination of the two, allowing for superior ventilation
  • Can be installed with head and seat boards

Contact us today to get a free quote on bay window replacement!


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The Thermo-Bilt Advantage

Over 20 years serving the Greater Toronto Area

 Equipped with a sturdy visibility screen for better airflow with an unobstructed view.  High-quality fusion welding on all corners for strong, insulating frames and sashes. Infrared-applied, white polyester warm edge seal for top thermal performance and smooth finish and energy efficient.

Lifetime warranty included. One of the few window companies in Toronto that uses Cardinal glass in all replacement windows and doors products; 7/8″ overall Cardinal I.G. sealed units. CSA rated. Available with self-cleaning Neat® glass.

Window installers will plan a Toronto window installation fit to your schedule. Custom awning window sizes and designs and materials available to suit your décor, including aluminum awning windows and vinyl awning replacement windows.

Thermo-Bilt Reviews

We purchased 10 energy efficient thermal pane windows and two doors in March. The representative Mr. Barry Liburkin did a fantastic job explaining the benefits of his products. We were very happy with the installation team led by Stan and Igor. The office staff was also very friendly and we will gladly refer this company to everyone for their windows and doors needs. A job well done! Thank you.

Thomas Reinboldt

Fantastic windows and installation services! Staff were prompt, courteous, and skilled. These windows are definitely high quality but the costs were affordable. Make a point of calling this excellent company.

Natalie M

We are very pleased with this company. They replaced 8 Windows in our house. Peter and his crew did a masterful job on our Bow window build. The job was done fast and efficient and we love the high quality of the product.

John Andrighetti

Customize Your Bay Windows for Your Toronto Home

Choose from seven beautiful awning window colour finishes and accent your Toronto home with touches of character and personality. Resistant to fading and deterioration, any colour you choose for your awning window replacement is sure to keep its pop throughout Toronto’s changing seasons.

Chestnut Brown
Commercial Brown
Dover Grey
Canyon Clay

When a splash of colour isn’t enough and you’re looking for more pop and originality, we offer seven textured and coloured surface finishes for awning windows. The added textures create depth, limit glare, and thanks to the hybrid co-polymer material we use, repels dirt – all while giving your awning style replacement windows and Toronto home a modern touch.

Chestnut Brown
Commercial Brown
Dover Grey
Canyon Clay
Double Glue Chip
Glue Chip

For a little more weight and depth to your awning style windows, we offer a variety of exterior brickmoulds in a number of sizes and colours to match your Toronto home’s style. All awning window brickmoulds include a built-in rubber gasket, meaning no messy calking or extra maintenance required.

1 ½”
1 3/16”
Zero Extension

Jambs solidify and enhance awning replacement windows on the inside and out. Choose from a number of solid vinyl, vinyl-clad, and wood jamb (Primed paint grade, oak, pine, and more) packages in a variety of cuts that perfectly complement common awning replacement sizes and styles.

Jamb sizes: 1-1/2″ 2-1/2" 3-3/8″ 4-5/8″
Casing sizes: 2-5/8″ 3-3/8″
Rosette sizes: 2-5/8″ 3-3/8″

Complete your Toronto awning window installation with sturdy, stunning grillwork. Whether your home is traditional, contemporary, or ultra-modern, Thermo-Bilt’s selection of grills complement any awning window design you choose. From classic brass and understated woods to gorgeous Georgian grills, you’re sure to find that final touch to make your new awning windows a work of art.

5/8” Brass
5/16” Brass
Brass Pencil
5/8” Pewter
5/16” Pewter
Pewter Pencil
SDL Shadow Bar
1” White
5/8” White
5/16” White
White Pencil
1” Georgian White
Georgian White

Standard Fiberglass Screen

Thermo-Bilt’s awning window screens are sourced from Phiferglass, Phifer’s trademarked fiberglass screening, a high-value, high-visibility screen that leads the pack in the replacement window industry. These screens for awning style replacement windows are made from a permanent glass yarn coated with a durable vinyl that protects from rust, corrosion, and stains.


  • Standard Widths: 24″ to 84″ (60.9cm to 213.4cm); other widths available on request
  • Standard Roll Length: 800′, 600′ and 300′ ROM’s (243.84m, 182.8m and 91.4m); 100′ rolls (30.48m)
  • Standard Colours: Charcoal and Silver Gray

Pet Screen

Got a dog? A cat? Another four-legged friend? Then consider Pet Screen as your window screen of choice for your awning window installation. More durable than typical insect screening, Pet Screen is a heavy-duty, vinyl-coated polyester insect screening that’s both pet- and puncture-resistant.


  • Standard Widths: 36″ (91.4cm), 48″ (121.9cm), 60″ (152.4cm), 72″ (182.9cm), 84″ (213.4cm), 96″ (243.8) and 120″ (304.8cm)
  • Standard Roll Length: 100′ (30.48m) in all widths and 50′ (15.24m) in all widths except 120″
  • Standard Colours: Black

BetterVue Screen

An alternative insect screen for your awning windows. BetterVue screens offer improved visibility and clearer views, all while maintaining its resiliency to insects and pets. Excellent airflow and durability, attested by its sterling accelerated weathering tests (QUV 1200hrs. and Xenon Arc 2500 Kjs.) scores.


  • Standard Widths: ROM’s: 18″ to 72″ (45.7cm to 182.9cm); 100′ Rolls: 24″ to 84″ (60.9cm to 213.4cm)
  • Standard Roll Length: 600′ ROM’s (182.8m) and 100′ rolls (30.48m)
  • Standard Colours: Black

Standard Handle

A straightforward awning window handle that operates smoothly and easily. Full 90-degree window opening. Quickly detaches from the sash for easy cleaning.

Folding Handle

Like your standard window handle, with one key differentiator: a peak operating torque for even easier operation. Arguably the most economical and space-efficient handle choice for awning windows.

Full-Flip Handle

The full-flip awning window handle maintains its ‘open’ position without retracting on itself while in operation. Evokes a modern aesthetic when nested. Smooth operation. Screen readily detaches for effortless cleaning without the need of removing the entire crank.

What's the Difference Between Bay and Bow Windows?

At first glance, bay and bow windows look very similar. Both work well to open up and beautify a room, let in lots of light, and add some elegance to the inside and outside of your home.

Bay Windows

  • Comprised of 3 panels
  • Angular structure, with a large window in the middle and a small window on either side
  • Protrude further from the wall into exterior space, creating more floor space inside
  • Optimal for more traditional architecture, but look great in any style home

Bow Windows

  • Comprised of 4-6 panels
  • Curved structure, creating a rounded appearance on the outside of your home
  • More glass panes allow for more light to enter the room
  • Usually wider than bay windows
  • Can be wrapped around the corner of a building for a panoramic view
  • Optimal for more modern architecture, but look great in any style home
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