Southern Ontario's trusted exterior specialists
Replacement windows, entry and patio doors, eavestroughs and full exterior renovations. Family-owned, Canadian-made products and 37+ years of work across Toronto, the GTA and Simcoe County.
★★★★★ Rated on Google and HomeStars · Financing available (OAC)
37+ years
Serving Ontario families
Family-owned
Owner-run, start to finish
100% Canadian
Canadian-made products
HomeStars winner
Every year since 2014
What we do
Window and door installer for Scarborough, Durham, York Region and Simcoe County.
Casement, awning, bay & bow, sliders and basement egress windows with Low-E glass.
Steel and fibreglass entry doors, patio doors and garden doors that seal out the cold.
Eavestrough and gutter replacement that moves water away from your walls and foundation.
Siding and exterior work that protects your home and lifts its curb appeal.
Complete exterior renovation
Windows, doors, eavestroughs and siding, planned together and installed by our own crew. You deal with one team and one written price.
A recent job in Oro-Medonte covered:
Why Fortress
Thousands of homeowners across Southern Ontario have trusted us with their homes. Here is why.
The True Fortress Exclusive Lifetime Warranty covers the product and the labour to fix it.
No subcontractors. The people who measure and install work for Fortress.
Certified products that meet Canadian standards for durability and energy efficiency.
Fully licensed, bonded and insured, so you can have us in your home with confidence.
Our glass
Choose from Neat+, Low-E 180, Low-E 366 and Low-E 272 sealed units, matched to how each room faces the sun.
Reviews
Real reviews from homeowners on Google and HomeStars. HomeStars winner every year since 2014.
Can’t say enough about Fortress Windows & Doors. We had our bay window leaking profusely during this past winter’s ice and snow. As we were drying our floors and carpeting a flyer arrived in the mail and my husband called them right away. Very professional and friendly. Answered all my questions and concerns. Our window looks amazing! Installation was done in one day. Steve and Richard did an awesome job. If you want a job done right call Fortress! I certainly will if I need them again!
I would highly recommend Fortress Windows!! We recently moved into an old house that had almost 50 year old windows that were falling apart and needed to be replaced before the winter time. Since we needed to replace so many windows, and wanted to keep the original wood framing to maintain the character of the house, we were looking for the right company to install them who would have high attention to detail and were easy to work with. We ended up evaluating 7 different window companies since it was such a big job, and Fortress windows stood out from the start! Our main contact Richard was excellent to work with and was very communicative (especially about making aware of potential issues and how to mitigate them) without being overly pushy like so many of the other companies were. The window installer Max was excellent as well! He had such a high level of attention to detail, and made sure everything was clean/organized on sight. Amazing experience and would definitely recommend!!
I moved into a townhouse with old windows which started leaking and was looking for replacement options. I’m glad I found Fortress windows, Steve was awesome from start to finish! Quality and value – best, communication great! The best part is Steve really patiently explained what options I have and what’s most suitable for our house to save money with best value. I’ve dealt with multiple contractors but very rare to find like Steve who is professional and genuinely care about customers nowadays! Neighbours liked the windows and I wish Steve and team get more business. I’m very happy with my new windows and highly recommend Fortress Windows to anyone who is looking for new Windows or Doors!
Our process
Five steps from first call to final walk-through.
Call (416) 291-5795 or send the quote form. Weekdays or Saturday, your pick.
An owner measures every opening, checks its condition and answers your questions.
Products and install on a single quote. No surprises later.
Everything is made to your measurements, then our crew installs it and cleans up.
We check the work with you before we leave. Your lifetime warranty starts.
Service areas
Offices in Scarborough and Barrie, with crews working across Southern Ontario.
Get a free, no-pressure quote. One written price, measured by an owner.