Family-owned since 1989
About Fortress Windows & Doors Inc.
A locally owned window and door company that has served Southern Ontario families for more than 37 years. The two owners still measure and install every job.
37+ years
Serving Ontario families
Family-owned
Locally owned and run
Lifetime warranty
Product and labour
HomeStars winner
12 times, including 2026
Our story
Our work speaks for itself. The difference is in the relationships we build.
We could be proud of our A+ Better Business Bureau rating. Many would expect us to ramble about having won Best of HomeStars 12 times. We’ll often talk about how our products and installation currently have the absolute best warranty in the windows and doors industry. These things are great, but there is something even more significant at Fortress Windows & Doors Inc.
It’s the personal touch of an experienced, knowledgeable service provider. We focus on relationships within our locally owned and operated business because we make our community great together.
Recognition
Awards earned
Best of the Best 2025
Winner 4 times.
Best of Awards 2026
Winner 12 times.
HomeStars winner
12 times, including 2026.
A+ BBB rating
Rated A+ by the Better Business Bureau.
The owners
Our team
Steve Mercer
Owner, estimates
Steve has 37 years of experience in the industry. He’s been involved in the building and contracting trades all his life. Most recently, his knowledge was as a home inspector. He’s also worked with several real estate agents, so you can rest assured that your estimates will be fair and accurate.
Steve McCue
Owner, installation
Steve has been installing windows and doors for 37 years. He’s in charge of each project’s installation components. If you have any questions about a complex installation, he’s your guy.
Our process
How the job runs
From first call to final walk-through.
Book a measure
Call (416) 291-5795 or send the quote form. Weekdays or Saturday, your pick.
In-home measure
An owner measures every opening, checks its condition and answers your questions.
One written price
Products and install on a single quote. No surprises later.
Build and install
Everything is made to your measurements, then our crew installs it and cleans up.
Walk-through
We check the work with you before we leave. Your lifetime warranty starts.
Our services
What we install
Talk to the owners
Get a free, no-pressure quote. Call (416) 291-5795 or book online.