REPLACEMENT WINDOWS AND DOORS OSHAWA
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 Oshawa that utilizes Cardinal Glass, you can expect some of the best replacement windows in Oshawa in terms of energy efficiency and value.
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REPLACEMENT WINDOWS AND DOORS OSHAWA
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 Oshawa that utilizes Cardinal Glass, you can expect some of the best replacement windows in Oshawa in terms of energy efficiency and value.
Schedule your free in-home,
no-obligation quote today!
"*" indicates required fields
Proudly extending Thermo-Bilt’s replacement windows and doors services to the Oshawa area
As one of the GTA’s leading windows and doors companies, Thermo-Bilt has become a household name in and around Toronto. All of our replacement window products use Cardinal Glass, which is durable, beautiful, and built to last. Our commitment to 100% customer satisfaction is backed by a lifetime manufacturer’s warranty on all parts, while our long list of seals and compliances demonstrate our dedication to top-of-the-line products.
Between high-quality products and friendly customer service, Thermo-Bilt is your first and last stop for replacement windows and doors in Oshawa.
Serving Windows and Doors Needs in the Durham Region for Over 20 Years
As a brand with over two decades of experience, Thermo-Bilt is a true industry expert. Our team of window installers takes the time to thoroughly assess the project first, so that when it comes time for the installation, it can often be completed in a single day. At Thermo-Bilt, we work fast without making any comprises on quality and procedure.
Proudly extending Thermo-Bilt’s replacement windows and doors services to the Oshawa area
As one of the GTA’s leading windows and doors companies, Thermo-Bilt has become a household name in and around Toronto. All of our replacement window products use Cardinal Glass, which is durable, beautiful, and built to last. Our commitment to 100% customer satisfaction is backed by a lifetime manufacturer’s warranty on all parts, while our long list of seals and compliances demonstrate our dedication to top-of-the-line products.
Between high-quality products and friendly customer service, Thermo-Bilt is your first and last stop for replacement windows and doors in Oshawa.
Serving Windows and Doors Needs in the Durham Region for Over 20 Years
As a brand with over two decades of experience, Thermo-Bilt is a true industry expert. Our team of window installers takes the time to thoroughly assess the project first, so that when it comes time for the installation, it can often be completed in a single day. At Thermo-Bilt, we work fast without making any comprises on quality and procedure.
See all Thermo-Bilt Windows in Oshawa

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 Oshawa

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?
YES! Energy efficient windows are an excellent choice for your Oshawa home. As a lakefront city, Oshawa is known to experience extreme weather conditions, especially in the winter. Having properly insulated, double- or triple- glazed energy efficient windows can make all the difference when it comes to climate control and major savings. Even though the Ontario energy rebate program is unfortunately no longer around, energy efficient windows have still been proven to make a positive impact on your energy bills and HVAC spend.
Thinking of selling your home? Energy efficient windows are a great value-add to any property. Impress prospective buyers with a major upgrade on your home, and pass on the energy savings to future homeowners.
Why Choose Vinyl Windows in Oshawa?
There are many reasons to choose vinyl windows for your Oshawa home. Vinyl is a very versatile material, flexible and airtight enough to tightly seal any opening, and with such low heat transference, vinyl windows beat out many other window types in terms of energy efficiency. Aesthetically-speaking, vinyl windows come in a range of colours, and can be painted to match your home’s décor.
What is the Cardinal Glass Difference?
All Thermo-Bilt products are crafted exclusively with Cardinal Glass. Cardinal glass is not only beautiful, it offers high insulation value, repelling cold air while retaining hot air in the winter, and rejecting heat and sunrays in the summer. Cardinal Glass is also uniquely self-cleaning, coated with a special coating that uses the power of UV rays and rain water to eliminate and wash away dirt and grime. All Cardinal Glass products are Energy Star® compliant, meaning that energy efficiency is high on the priority list.