Welcome to

Fortress Windows & Doors

We could be proud of our A+ Better Business Bureau rating. Many would expect us to ramble on about having the Best of Homestars for 2019. We’ll often talk about how we have the absolute best warranty in the windows and doors industry right now on our products and our workmanship. These things are great, but at Fortress Windows & Doors Inc., there is something even greater.

It’s the personal touch of an experienced, knowledgeable service provider. We focus on relationships within our locally owned and operated Toronto, ON business because together we make our community great. We provide our services in Toronto, Mississauga, Newmarket, Richmond Hill, Barrie, Oshawa & across Canada. Here is who you will be speaking with when you contact us about your next project.

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That's not all ...

Why Fortress is Trusted by Many for Replacement & Installation Services?


Everybody has heard that there is no “I” in TEAM. We recognize the importance of everybody on our team and the value that they bring with the right attitude and their many years of professional quality workmanship. LEARN MORE


Warren Buffett says that there is always one thing more important than price, and that is VALUE. To buy based on price alone is rarely a wise thing to do. LEARN MORE


Some people say they have 20 years experience when in fact, they only have one year experience 20 times. We at Fortress are dedicated to embracing the latest technology and installation processes and our clients are the beneficiaries of that focus. LEARN MORE


Our warranty, bar none, is the absolute best warranty in the industry: why? Because we care about you and we want you to know that we are a company of high integrity! LEARN MORE

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We have high quality products that are CSA Certified and Energy Star rated as well.

Our workmanship is amongst the best in the industry

We have been awarded the prestigious “Best of HomeStars” award, every year since 2014

Our warranty is the absolute best and most comprehensive in the industry.

We truly care about you and value our clients


  • Mike
    We were very pleased with the Installer Dave and the job he did for us. He was very professional, punctual and a perfectionist. Both Steves we dealt with were very helpful and kept us informed on when the job would be done. We would highly recommend this company.
  • Aisha & Craig
    The crew from Fortress Windows and Doors was excellent they came to our home, gave us a quote, measured and took the time to discuss our options: Excellent service and completed the job in an timely manner. They replaced did 5 windows for a fair price compared to other companies.I would recommend this company to anyone and will always consider using them for future projects.Thanks you Steve and crew
    Aisha & Craig
  • Eleanor
    The whole team did a great job replacing all of the windows. I obtained only the one estimate because Steve Mercer projected such a strong sense of integrity and work ethic and this was apparent in the whole team; Steve McCue, Stan and Paul. The price worked, the work was done efficiently and looks great. I even noticed a couple of extra touches after they left that were greatly appreciated but not part of the actual job. Steve Mercer followed up after the installation to ensure I know how to get the most out of my new window purchase. A very impressive organization and a pleasure to meet every one.

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