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Over $325 per Window in Free Factory Upgrades

We're Extending Our Sale, Don't Miss Out!

Plus 50% Off all Window and Door installations.

No Interest and No payments for 365 days from installation! OAC.

6 Great Reasons to Choose Clera Windows + Doors in Ontario

Why take a chance with other window or door companies that purchase their products from another supplier, only to resell them to you for a higher cost?

Clera Windows + Doors is one of Canada’s largest, oldest, most dependable and reputable vinyl window manufacturers in Ontario. We fully manage and take care of your door and window replacement project from start to finish, ensuring every stage of your window or door project meets our lofty standards of craftsmanship.

Why are we Ontario’s most awarded window and door company?

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Canadian Ownership

Celebrating 45+ years of serving Canadians.

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Free at Home Consultation

No pressure, just expert advice and a straightforward estimate.

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Buy Direct!

We manufacture & install so you save!

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Lifetime Warranty

Non-Prorated, Fully Transferrable Warranty

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Most Awarded Company

For Windows + Doors by HomeStars, 16 times.

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Top Choice Award Winner

Awarded one of the Top 3 Best Windows + Doors Companies.

Customized Windows & Doors In Alliston - Clera Windows + Doors

New Windows in Ontario

With a wide variety of styles and colours customized to your needs, you’re sure to find the perfect new windows for your home at Clera Windows + Doors. Because we only use top quality materials and all of our installations are done by our window wise trained and experienced staff, we are able to offer a no-nonsense, fully transferrable lifetime warranty on all window hardware, components, and glass including no-cost replacement parts. Featuring a large selection of sizes, colours, and styles Clera has solutions for every home, style, and budget.

Utilizing compression weather stripping, warm edge spacers and multi-chambered frames, we are able to create exceptional insulation against heat and cold as well as keeping moisture out. By using only the highest quality materials and our own window wise trained installers, we guarantee you will be satisfied by providing you with a no-nonsense, transferrable warranty.

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Free Factory Upgrades When You Replace Your Windows With Clera

Maximize Your Savings

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Get over

$325 per Window

in FREE factory upgrades

With our wide range of ENERGY STAR products, you can be sure to save big on your next dream project!

Learn More
Celebrating 45 Years - Clera Windows And Doors

Cost Benefits of Choosing Clera Windows + Doors

Necessary home upgrades can be costly but are a worthwhile investment. We are committed to overseeing the entire process of manufacturing windows and doors, guaranteeing cost efficiency for you. Taking advantage of Clera Windows + Doors promotions on top of our factory direct pricing can help make improvements to your property even more affordable. 

Our sales and other promotions are updated regularly to ensure our customers only get the best bang for their buck.

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Over 45 Years of Experience

With over 45 years of experience, we have earned a reputation as one of Canada's leading window and door manufacturers and installers.

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Certified Technicians

You can trust our team of factory trained technicians to install your new windows perfectly—our A+ BBB rating is no accident!

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Serving Ontario With over 45 Branches

We have over 45 branches across Ontario, which means that we're always close by when you need us.

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Non-prorated Lifetime Warranty

Whenever anything goes wrong with your windows, we'll take care of it for you—no questions asked.

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ENERGY STAR® Certified

Our windows meet Canada's strict energy-efficiency standards. A window from Clera is not only high-quality and durable, but also energy-efficient..

Ontario's Preferred Choice for High-Quality Windows & Doors

We’ve served the GTA area for over 45 years, outfitting more than 300,000 homes with windows and doors built to last.

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Talk to our window and door consultants

In business since 1978, we’re known for our quality doors and new windows in Ontario as well as for our excellent customer service. We custom manufacture your replacement vinyl windows and doors to your exact requirements and specifications in our factory in Concord, Ontario. Our certified quality program ensures that you get a top-notch installation from our own window wise trained installers, many of whom have been with us for decades. With Clera Windows + Doors, there’s no middle man, just straight talk and an honest approach. If you need new windows in Ontario, there is no better choice!

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