REPLACEMENT WINDOWS AND DOORS WHITBY
Choose from a wide variety of energy efficient replacement windows to suit the unique requirements of your home. As one of the few window companies in Whitby that utilizes Cardinal Glass, you can expect some of the best replacement windows in Whitby in terms of energy efficiency and value.
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REPLACEMENT WINDOWS AND DOORS WHITBY
Choose from a wide variety of energy efficient replacement windows to suit the unique requirements of your home. As one of the few window companies in Whitby that utilizes Cardinal Glass, you can expect some of the best replacement windows in Whitby in terms of energy efficiency and value.
Schedule your free in-home,
no-obligation quote today!
"*" indicates required fields
Looking for replacement windows and doors for your Whitby home? Thermo-Bilt proudly services your area.
With the highest-quality replacement window and doors products that use Cardinal Glass, and an expert team of window installers behind us, Thermo-Bilt strives for absolute satisfaction in all the work that we do. Our windows and doors are not only beautiful, but strong, functional, and built to last. Our window installers are dedicated to 100% customer satisfaction, backed by a lifetime manufacturer’s warranty on all parts. We work quickly, often completing windows and doors installations in one single day, without compromising quality.
For the best blend of industry expertise and experience, make Thermo-Bilt the go-to for your Whitby windows and doors replacements.
Over 20 Years of Experience Serving Ontario’s Windows and Doors Needs
Over 20 years and over 30,000 installations later, Thermo-Bilt has built a reputation as, and remained an industry leader in Whitby window installation and door replacement. We have extensive experience throughout the GTA, including the Durham region and Whitby area. Two decades later, we’re still putting our window installers through rigorous training, ensuring every installation is completed to perfection so that you can confidently enjoy your new replacement windows and doors without worry.
Looking for replacement windows and doors for your Whitby home? Thermo-Bilt proudly services your area.
With the highest-quality replacement window and doors products that use Cardinal Glass, and an expert team of window installers behind us, Thermo-Bilt strives for absolute satisfaction in all the work that we do. Our windows and doors are not only beautiful, but strong, functional, and built to last. Our window installers are dedicated to 100% customer satisfaction, backed by a lifetime manufacturer’s warranty on all parts. We work quickly, often completing windows and doors installations in one single day, without compromising quality.
For the best blend of industry expertise and experience, make Thermo-Bilt the go-to for your Whitby windows and doors replacements.
Over 20 Years of Experience Serving Ontario’s Windows and Doors Needs
Over 20 years and over 30,000 installations later, Thermo-Bilt has built a reputation as, and remained an industry leader in, Toronto window installation and door replacement. We have extensive experience throughout the GTA, including the Durham region and Whitby area. Two decades later, we’re still putting our window installers through rigorous training, ensuring every installation is completed to perfection so that you can confidently enjoy your new replacement windows and doors without worry.
See all Thermo-Bilt Windows in Whitby

Double Hung Windows
Our double hung windows are an excellent choice for rooms that face decks, porches and walkways.

Casement Windows
Our casement windows are reliable, practical, energy efficient and designed to keep harsh weather out.

Bay Windows
Our bay windows are decorative that curves outwards from the wall, allowing you amazing views.

Single Hung Windows
Our single hung windows are easy to clean and take up no additional space when open.
Thermo-Bilt Reviews
See all Thermo-Bilt Doors in Whitby

Steel Entry Doors
Our steel entry doors are rich with features that make them an excellent choice for your home.

Fiberglass Doors
Our fiberglass entry doors are a perfect compromise between aesthetics, durability, and safety for your home.

Sliding Patio Doors
Our sliding patio doors are an excellent way to save space in your cozy home.

Hinged Patio Doors
Our hinged patio doors swings outwards, opening up the inside of your house to your beautiful yard, garden, or patio.
Our Work
Our window company in Toronto has worked on thousands of homes. Take a look at the range of Toronto window installation jobs we’ve completed over the years.
FAQs
Are Energy Efficient Windows a Good Investment?
In a word, absolutely! Compared to conventional windows, energy efficient windows are up to 40% more effective. This means that even though the Ontario Energy Rebate Program, GreenON, has been dissolved, energy efficient windows are proven to significantly cut down your energy bills and HVAC expenses. Combining excellent insulation, double- or triple- glazed glass, and an air tight seal, you will never have to worry about issues such as drafty windows, air leakage and condensation. Solid insulation means your air conditioning and heating will not have to work as hard, and the temperature of your home will always be at whatever comfort levels you enjoy.
Don’t forget that energy efficient windows also make a big difference when it comes to increasing your property’s value. Potential buyers are likely to be impressed by the major upgrade made to your home, and happy with the energy savings that you’ll be passing on to them.
Why Choose Vinyl Windows in Whitby?
Vinyl windows are an excellent choice for many reasons. Not only are they more cost-effective than many other window types, but they also present a number of unique benefits. First off, vinyl windows’ energy efficiency is hard to beat. Vinyl grips on to the glass and frame, forming an air tight seal that doesn’t allow air to flow in and out of the house, maintaining a comfortable climate. As a material, it also doesn’t allow for climate transfer, meaning that cold or warm air coming from outside will have no effect on the indoor temperature.
Aesthetically speaking, vinyl is a versatile material that is easy to paint and comes in an assortment of colours.
The Cardinal Glass Difference
Cardinal Glass, Thermo-Bilt’s only choice when it comes to glass manufacturers, is a highly innovative company that designs and manufactures the most advanced residential glass products in the industry. The Energy Star® compliance achieved is due to their highly efficient, industry-setting insulation properties. Cardinal Glass windows are effectively able to keep warm air from escaping your home in winter, while repelling harmful UV rays and heat in the summer – without producing any glare or tint. All Cardinal Glass products come coated with a special self-cleaning coating that uses the power of UV rays and rain water to make your windows maintenance-free.