Why Clera?

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.

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