15 Best Window Manufacturers in Ontario

If you’re a homeowner in Ontario planning to replace your windows, you’re in the right place. The climate here can be a demanding teacher: scorching summers, freezing winters, and everything in between. Therefore, it is essential to pick windows that not only look beautiful but also stand up to Ontario’s weather year-round.

This guide is designed specifically for Ontario homeowners, whether you live in a cozy bungalow in Toronto, a heritage home in Kingston, or a cottage up north near Muskoka! We'll help you find the best window manufacturers in Ontario that can provide you with the windows of your dreams!

Things to Keep in Mind While Looking For Window Manufacturers in Ontario

When selecting a window manufacturer in Ontario, it’s important not to rely solely on advertising claims. Instead, pay close attention to the technical aspects and quality markers that indicate a reliable product and service:

• Frame material – since Ontario often experiences dramatic temperature swings, choose windows built from strong, weather-resistant materials that won’t warp, crack, or deteriorate with seasonal changes.
• Glass & insulation – effective insulation depends on features like double or triple glazing, low-emissivity (Low-E) coatings, durable spacers, and a well-engineered insulated glass unit (IGU). A good company should provide multiple glazing technologies so you can select what best matches your energy needs and comfort preferences.
• Hardware quality – smooth functionality and long-lasting durability rely heavily on the design and build of the hardware. Prioritize windows that are easy to operate, require minimal upkeep, and allow for simple cleaning.
• Screens & blinds – for a consistent look and precise fit, look for providers that also supply built-in or compatible window treatments.
• Customization & warranty – a top-tier window and door manufacturer will let you personalize elements such as colour, finish, and style while also offering a robust, transferable warranty that protects your investment.
• Energy performance – always review energy efficiency ratings, including U-factor (a lower number is better), Solar Heat Gain Coefficient, and Visible Transmittance. In Canada’s severe climate, ENERGY STAR® certification is an essential benchmark.
• Professional installation – even the best window won’t perform properly without skilled installation. So, choose companies that employ certified installers, manage the removal and disposal of old windows, and complete a final inspection to verify results and warranty compliance.
• Customer satisfaction & reputation – visit showrooms, read verified reviews, and examine company brochures and marketplace standing. The most reliable providers deliver strong customer service and maintain fair, competitive pricing.
• Price transparency – make sure that the company offers a detailed, itemized quote with no hidden charges. Ideally, the initial consultation should be complimentary.

Important note: avoid companies that present unclear pricing, use pushy or aggressive sales tactics, or fail to provide straightforward warranty details.

15 Best Window Companies in Ontario

So, which window company in Ontario should you choose for your window replacement project? Below, you'll find a list of the top-rated window manufacturers in Ontario (in no particular order). Most of them service multiple regions in Ontario, so it's recommended to confirm with them whether they install windows and doors in your particular area.

Don't forget to check with each company directly regarding their warranties, as different window components are covered by different terms.

1. Magic Windows and Doors

Magic is a Toronto-based window company, leading in installation, servicing, and warranty with over 40 years of market experience, servicing different areas across Ontario. Our products feature innovative technologies like the Hybrid Fusion Frame, Parallex Hardware, and Slide’N’Hide screen technology, making windows energy-efficient and aesthetically pleasing.

We offer sliding windows, awning windows, bay windows, bow windows, double-hung windows, casement windows, custom windows, fixed windows, and pass-through windows. We also provide a wide range of sliding patio doors, glass doors, window wall, and front door options.

Noteworthy highlights:

• Manufacturing is done in-house, ensuring quality control
• Hybrid Fusion Frame, which combines vinyl, aluminum, and stainless steel, featuring welded corners and sleek profiles
• Parallex hardware, which eliminates the need for traditional cranks
• Enhanced insulation benefits from a wider gap between panes, maximizing argon gas fill
• An industry-leading 40-year warranty
• Multi-point locking systems
• Unique Slide'N'Hide technology, which offers fully retractable bug screens to invite more natural light indoors
• Integrated energy-saving solar shades and thermal blinds
• Hi-Flo Drainage system, which prevents water accumulation and insect entry

Important considerations:

• Products generally come with a higher price point compared to average market options.

2. Centennial Windows & Doors

Centennial Windows & Doors is a well-regarded manufacturer and supplier operating in Ontario, known for producing high-quality, energy-efficient windows designed to meet the demands of Canadian homes. They focus on durable materials and innovative designs that blend performance with aesthetic appeal, offering a range of customizable options suited for various architectural styles across the province.

Noteworthy highlights:

• Constructed with high-performance vinyl for durability and energy efficiency
• ENERGY STAR certified windows tailored for Ontario’s climate
• Multiple glazing options, including double and triple-pane glass for superior insulation
• Possibility to benefit from Instant Manufacturer's Rebate
• Wide range of finishes and colors with customizable hardware choices
• Designed for easy maintenance and long-term reliability
• Foam-filled frames for superior heat and sound insulation

Important considerations:

• Some customers have noted variable lead times depending on customization levels.
• Warranty details should be reviewed carefully as terms may vary based on product lines and installation.

3. Canadian Choice Windows & Doors

Canadian Choice Windows & Doors specializes in manufacturing and installing energy-efficient windows and doors. They offer every homeowner custom solutions, having installed new house windows for over 100,000 clients in the region!

Noteworthy highlights:

• Proudly manufactured in Canada, ensuring stringent quality standards
• Over 40 distinct styles and a broad palette of colour options to fit your design preferences
• Proprietary DraftLOCK™ technology, which significantly boosts your home's energy efficiency and helps reduce energy bills
• Products carry ENERGY STAR certification, meeting high energy performance standards
• 25-year transferable warranty that provides peace of mind for years to come
• Free consultation paired with flexible payment plans to suit your budget

Important considerations:

• There have been reports of occasional customer service delays and missed appointments.

4. Northern Performance Windows & Doors

Northern Performance Windows & Doors is a locally owned and operated company that has been serving Simcoe County and the Muskoka region since 1991. Based in Orillia, Ontario, they are known for high-quality products, professional installation services, and exceptional customer service, with over 30 years of experience in the window and door industry.

Noteworthy highlights:

• SUPER SPACER technology, the best to safeguard against condensation and heat transference
• Double and triple-pane windows with argon or krypton gas

Important considerations:

• Limited information available online about warranties
• Service area is primarily focused on Central Ontario (Simcoe County and Muskoka regions)
• As a smaller, local company, they may have limited capacity during peak seasons

5. Clera Windows + Doors

With 47 years of solid experience, Clera Windows + Doors stands out as a prominent Ontario-based company. Family-owned since its founding in 1978, the company controls the entire process: from design and manufacturing to installation and after-service. Plus, their factory-direct pricing model allows customers to save by eliminating resellers.

Noteworthy highlights:

• Certified ENERGY STAR products that meet strict energy-efficiency guidelines
• Constructed from 100% pure virgin UPVC vinyl, fusion-welded for added strength and durability
• Factory-direct sales channel, ensuring cost savings for customers
• Super Spacer® technology, which enhances thermal insulation and reduces noise infiltration
• Locally based installation teams who are fully trained and certified
• Lifetime warranty that is non-prorated and fully transferable between homeowners

Important considerations:

• Some customers have experienced delays in installation and service timelines.
• Communication feedback is mixed, with occasional reports of inconsistent responsiveness.

6. Renewal by Andersen

Renewal by Andersen is a premium window replacement brand in Canada, specializing in custom-built, energy-efficient windows that are installed by expert craftsmen. The company operates as a division of Andersen Windows, offering comprehensive window upgrade services. Their products are also available through The Home Depot, authorized window and door dealers, and certified contractors.

Noteworthy highlights:

• Frames made from exclusive Fibrex® composite, which is stronger than vinyl, durable, and environmentally friendly
• ENERGY STAR® certification, ensuring excellent energy efficiency
• SmartSun with HeatLock technology provides superior thermal insulation
• Custom sizing options, along with a broad selection of interior and exterior colors
• Low-maintenance materials that resist flaking, pitting, peeling, and corrosion
• In-house professional installation teams to ensure quality workmanship
• Complimentary in-home design consultations to tailor solutions

Important considerations:

• Pricing is higher compared to many other window options on the market.
• Their service model only supports full-service replacement with certified installers; self-installation or third-party contractors are not allowed.
• Dealer coverage is limited in certain regions, which may affect availability.

7. Total Home Windows & Doors

Total Home Windows & Doors is a Toronto-based company serving the Greater Toronto Area with over 15 years of experience, having installed windows for over 15,000 satisfied customers!

They specialize in manufacturing and installing premium windows and doors engineered for Canadian climates, combining advanced technology, innovative design, and customer-focused service. They also offer turnkey service, which means they'll take care of everything from A to Z for your window replacement project.

Noteworthy highlights:

• Vinyl and aluminum windows
• Windows constructed for ENERGY STAR® standards, featuring double and triple glass units with argon gas, Low-E coatings, and super spacers
• Enhanced Encore Operators with a full-flip folding handle and snap-fit cover for better operation
• Total Seal technology for superior weather defense
• Free in-home consultations and detailed measurements using advanced software to tailor precise orders

Important considerations:

• Demand and customization may affect lead times, so early consultation is recommended.

8. Pella Windows and Doors

Pella Windows and Doors is a leading innovator, recognized for built-in blinds, advanced smart-home features, and a wide range of material choices. Offering wood, vinyl, and fiberglass frames, Pella provides superior energy efficiency with ENERGY STAR certification.

Noteworthy highlights:

• Frame options available in wood, vinyl, and fiberglass to suit different performance needs and aesthetic tastes
• ENERGY STAR® certification, which ensures excellent energy efficiency
• Integrated blinds and shades, which provide privacy while simplifying cleaning
• Custom sizing options with a variety of finishes and hardware selections
• In-house design consultations to assist with personalized projects

Important considerations:

• Warranty transferability may vary and should be confirmed directly with the company.
• Some customers have reported delays in customer service and challenges obtaining replacement components.

9. GTA Direct Windows & Doors

GTA Direct Windows & Doors serves the Ontario region, primarily Toronto, Mississauga, Hamilton, Markham, Vaughan, and Brampton. The company is known for its Canadian-made, energy-efficient products. They offer a range of customizable, high-performance windows and entry doors made of durable materials like uPVC.

Noteworthy highlights:

• Windows crafted from high-quality uPVC and other robust materials
• ENERGY STAR certified products, which offer excellent thermal insulation and soundproofing
• Multiple glazing choices, such as single, double, triple, and Low-E glass options
• Wide array of finishes, trims, casings, and color selections for personalized aesthetics
• Frames designed with multiple internal air chambers to enhance insulation

Important considerations:

• Some customers have experienced delays in scheduling appointments.
• Occasional communication challenges have been reported in reviews.

10. Window Mart Windows and Doors

Window Mart is a Canadian company with a strong presence across the country, serving Alberta, British Columbia, Saskatchewan, and Ontario. They are recognized for their high-quality vinyl windows and fiberglass entrance door installations designed specifically for Canadian weather conditions, offering custom solutions for both new construction and renovation projects.

Noteworthy highlights:

• Constructed from 100% lead-free uPVC vinyl
• Patented fusion-welded frames and sashes for superior strength
• Glass units with 13/16″ overall thickness
• ENERGY STAR® certified products with excellent U-factor ratings
• Comprehensive service coverage across multiple provinces, including Ontario

Important considerations:

• Lead times may vary depending on customization requirements and location.
• Service availability might be limited in extremely remote areas.
• Product lines may have different warranty terms that should be clarified during consultation.

11. NorthShield Windows and Doors

NorthShield Windows and Doors is a Canadian company serving Toronto and the Greater Toronto Area. Renowned for manufacturing premium vinyl windows and doors, their products are designed to endure Ontario's challenging weather conditions. The company emphasizes local production, cutting-edge window technology, and professional installation backed by a lifetime transferable warranty.

Noteworthy highlights:

• Windows proudly made in Canada with robust vinyl frames built to last
• Wide range of window coverings to complement any home style
• Numerous energy-efficient options to reduce energy consumption
• Inside-accessible screens designed for easy cleaning and maintenance

Important considerations:

• Some customers have reported delays in scheduling.

12. EcoChoice Windows & Doors

Eco Choice Windows & Doors is a well-established company serving Ontario with over 15 years of experience. They specialize in supplying and installing high-quality, energy-efficient vinyl windows, entry doors, and garden doors designed to enhance home comfort and reduce energy expenses.

Noteworthy highlights:

• ENERGY STAR® certified products for reliable performance and durability
• Options with triple-pane and impact-resistant glass for added protection
• Frame profiles measuring 4 9/16” with extra thermal pockets for superior insulation
• Multiple window types, finishes, and customizable colour options
• Flexible payment plans available
• Complimentary in-home consultations
• Professional installation by trained experts

Important considerations:

• Some customer feedback highlights occasional delays in delivery and installation.
• There have been reports of challenges with post-installation customer support.

13. Vinyl Light Windows & Doors

Vinyl Light Windows & Doors specializes in energy-efficient vinyl windows tailored for homes throughout the GTA. Their products (from single-hung windows to bow windows and picture windows) suit homes of all ages, from heritage-style Victorians to new builds, focusing on insulation and noise reduction.

Noteworthy highlights:

• ENERGY STAR® rated for lower energy costs
• Available fiberglass door and window options
• Multiple glass and frame styles for security, performance, and appearance
• 90-degree sash opening for accessibility
• Free in-home consultations and fast, local manufacturing for quick turnaround

Important considerations:

• Peak season can lead to delays in delivery or installation.

14. EcoTech Windows & Doors

Operating since 2001, EcoTech Windows & Doors supplies Ontario homeowners with energy-efficient vinyl windows and doors built to withstand Canadian climates. A commitment to durable products, professional installation, and excellent customer service defines their reputation.

Noteworthy highlights:

• ENERGY STAR certified with EcoSmart Technology designed for Canadian conditions
• Certified installers with keen attention to detail
• Lifetime transferable warranty on most products
• Free in-home estimates and competitive pricing
• Financing available and Air Miles rewards program

Important considerations:

• Some reports of post-installation service issues and inaccurate measurements.

15. Nordik Windows and Doors

Nordik Windows & Doors is a factory-direct company with a strong Ontario heritage, specializing in stylish, ultra-energy-efficient RevoCell mPVC windows. They offer local manufacturing, a broad selection of contemporary and classic styles, and significant year-round energy savings.

Noteworthy highlights:

• Exclusive RevoCell microcellular PVC technology for exceptional energy efficiency
• Industry-leading 25-year transferable warranty covering product, installation, and service
• Factory-direct pricing, eliminating middleman costs
• ENERGY STAR certification

Important considerations:

• Some customers report communication delays
• Higher pricing compared to competitors
• Occasional installation issues cited

Window Installation and Performance in Ontario’s Rural and Suburban Areas

If you live outside of the city, in one of Ontario’s beautiful rural or suburban areas, replacing your windows can bring some special challenges, but also big benefits. Here’s what to keep in mind to make sure your window project goes smoothly and delivers the comfort and energy savings you want!

Installation Tips for Rural and Suburban Homes

Homes in rural and suburban Ontario often have unique features: maybe larger window openings, custom shapes, or older heritage styles. Because of this, the installation process might take a bit more time and require custom fitting to get the perfect seal and finish.

Plus, access might be tricky: narrow roads or weather can slow down deliveries or installer arrival times. That’s why it’s super important to pick manufacturers and installers who know these challenges well and have experience working outside of urban centers.

Handling Ontario’s Cold and Humid Climate

Winter in Ontario isn’t easy on your windows. The cold, wind, and moisture can cause heat loss and drafts if your windows aren’t up to the task. Therefore, look for windows that have double or triple glazing, special Low-E glass coatings, and gas fills like argon that help keep heat in and cold out.

Proper installation also means avoiding annoying issues like frost build-up or condensation that can affect your home’s comfort and even cause damage over time.

Finding the Right Supplier Where You Live

While places like Toronto, Ottawa, and Hamilton have plenty of window suppliers and installers, more remote areas might have fewer options. This might mean longer wait times or higher costs for delivery and service.

Luckily, many top Ontario manufacturers now offer regional support or work with local partners to help cover the entire province. Nonetheless, before you buy, make sure your supplier can service your home’s area without headaches.

Take Advantage of Rebate Programs

Good news: Ontario offers several rebate programs to help you afford energy-efficient windows. Therefore, you could get money back for choosing windows that meet ENERGY STAR® standards. These programs often have deadlines and require paperwork, so get details early from your manufacturer or local energy office to make sure you don’t miss out on savings.

For more details on Ontario rebate programs, you can check our comprehensive guide on the topic. You can also learn how to apply for a window rebate in Ontario in this article.

Ontario's Regional Climate Differences: How Do They Influence Your Window Choice?

Ontario is a huge province with different climates, from the milder, more temperate areas in the south to the colder, harsher conditions in the north. So, when you’re considering replacing your windows, it’s important to pick a window manufacturer that provides products and features suited to your specific location and its unique weather challenges.

Southern Ontario

If you live in southern Ontario (think Toronto, London, or Windsor) you’ll experience humid summers with temperatures that can easily climb above 86°F (30°C) and winters that get cold but generally stay a bit milder compared to the north. In this region, you’ll want windows that handle humidity well, offer strong UV protection, and deliver good insulation against cold winters.

Other Regions

Head north toward places like Sudbury, Thunder Bay, or even beyond, and the weather changes dramatically. Temperatures can plunge well below freezing for months, often hitting -4°F (-20°C).

Here, energy efficiency isn’t just about saving money. It’s about keeping your home comfortable and safe during long, bitterly cold winters. Triple-pane glazing, argon or krypton gas fills, and robust weather stripping become absolutely essential. You’ll also want windows that can resist frost buildup and won’t let drafts sneak through.

Remote Northern Areas

And then there are the remote northern areas, including communities accessible only by air or seasonal roads. These regions have even more extreme weather, with shorter growing seasons and long winters that demand windows built for durability and superior thermal performance.

Final Thoughts

When choosing between window and door companies in Ontario, focus on more than just the price. The right company will ensure craftsmanship, energy performance technologies, and a smooth customer journey from consultation to after installation.

Choose companies that are transparent about pricing and warranty, offer ENERGY STAR-certified products for Ontario’s climate, and provide modern technologies for better insulation, security, and ease of use.

Among the many Ontario-based window manufacturers, Magic stands out for its innovative technologies and industry-leading 40-year warranty.

Therefore, for reliable, technologically advanced, and beautifully crafted replacement windows in Ontario, book a free in-home consultation with Magic!

Frequently Asked Questions

What is the best brand of windows in Canada?

The top window replacement companies in Canada depend on your specific needs, but industry leaders like Magic, Canadian Choice, and Renewal by Andersen consistently receive high marks for quality, energy efficiency, and customer satisfaction. These brands offer products tailored to Canadian climates and come with robust warranties and proven performance.

Who makes the best quality windows?

Manufacturers such as Magic, Renewal by Andersen, EcoTech, Nordik, and Clera are known for producing some of the highest quality windows in Canada, combining innovative materials and superior craftsmanship. Their products are designed for durability, energy efficiency, and long-lasting performance in harsh Canadian weather.

What are the best windows for Canadian winters?

The best windows for Canadian winters are those that offer triple-pane glazing, high-performance Low-E coatings, and gas fills like argon or krypton to maximize insulation and minimize heat loss. Look for ENERGY STAR certified windows with warm-edge spacer technology and durable, weather-resistant frames.

What brand of windows lasts the longest?

Brands like Magic Windows, renowned for their Hybrid Fusion Frame technology, and Renewal by Andersen, with their durable Fibrex composite frames, are recognized for producing windows that can last several decades with proper maintenance. Magic windows, for example, come with an industry-leading 40-year warranty.

How much does a new window cost in Ontario?

A new window in Ontario typically costs between $300 and $2,500, influenced by factors such as material, size, style, and installation complexity.

How often should home windows be replaced?

Home windows should generally be replaced every 15 to 20 years, or sooner if you observe drafts, condensation, or operational issues.

What should I look for in a window company's warranty?

Seek warranties that offer extensive coverage on both materials and labor to ensure lasting protection for your investment. This guarantees peace of mind and reinforces the quality of the window products.