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Why Clera?

Name: Windows and Doors
Brand: Clera Windows + Doors
Rating: 4.7 (2557 reviews)

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?

Over 41 years of experience

Since 1978, Steve Mastrorillo has played a key role in maintaining the high quality and craftsmanship behind every Clera window + door.

Window Wise certified installation team

Our installation team is fully Window Wise trained, certified, and bonded. All of our installers are local, meaning swift service if your windows or doors ever need further maintenance.

Serving Ontario with over 40 branches

With more than 40 sales and installation offices throughout Ontario, Clera Windows + Doors has revitalized over 250,000 homes!

Non-prorated lifetime warranty

Clera's windows + doors are backed by the best and most comprehensive warranty in the industry – a no-nonsense, non pro-rated, transferable lifetime warranty on all vinyl window hardware, components, and glass. You’ll never have to pay for a new part again!

ENERGY STAR® Certified

Being environmentally conscious is important to us. Every Clera window + door meets the strict technical requirements of ENERGY STAR®, resulting in big energy savings, and a small ecological footprint.

We manufacture, we install, you save!

Unlike many of our competitors, we design and manufacture every window that we install. That means you get better value for better windows and doors.

Learn More About Clera

I was very impressed with your operation and quality control procedures. I researched all the companies that were considered for this 70 unit complex, finding that Clera offered the best warranty.
- Mark S
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Your professional, courteous and caring sales approach put as at ease from day one. We wish all sales people could have your level of professionalism and understanding. Not to mention your knowledge of your product.
- Greg and Julie S
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We were really impressed with what a professional job was done with no mess. It is really nice to see staff dedicated to honouring an agreement and being on time with the right equipment.
- JoAnne M
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Read what clients have to say about Clera Windows

We recently had our sliding patio doors replaced with garden doors with interior blinds. We have received so many compliments on our doors. Mike and his crew (Mike and Anthony) are very friendly and professional. It was a pleasure having them in our home. The installation was seamless and clean. They already have someone who will be ordering from them, after seeing these doors at our place. I'm sure there will be more to come. Thanks guys!

Reviewer: Maria Novielli

5 out of 5 stars

I have nothing but good things to say about the services I have received from Clera. About 4 years ago I purchased a new front door from Clera. The salesperson was knowledgeable and understood what I was looking for. When it came time for installation, the installers were professional and friendly. They discovered a small dent in the door at the bottom and told me that they had ordered a new door . This was done before my final inspection. Based on this experience, I had new windows replaced in a rental home in Kingston. This salesperson was also very knowledgeable and took the time to help us. He even inspected other windows and told us which ones did not need to be replaced. More recently, I have purchased two new windows for my own home in Ottawa and have been equally pleased with the service, quality of workmanship and the windows themselves. I always recommend Clera to anyone that I know who are looking for windows or doors.

Reviewer: Tammy Yazbeck

5 out of 5 stars

Excellent! We have loved our dealings with Clera. Rod was amazing in listening and understanding the look we were trying to achieve and then suggesting products with the appropriate features. The windows were delivered within the expected delivery time frame. The installation was done quickly and the crew was very professional and accommodating. The windows we had install have made the house much brighter. The doors we had install feel very solid, despite both presently unique challenges. Clera's quote wasn't the cheapest quote we had but their price was certainly competitive and the results have been well worth the money.

Reviewer: Eric Tang

5 out of 5 stars

Why Clera?

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