Service areas
Expert Window & Door Installation Across Toronto, Scarborough, Barrie & the GTA
For over 35 years, Fortress Windows & Doors has been the trusted choice for homeowners throughout the Greater Toronto Area, York Region, Durham Region, and Simcoe County. From Toronto and Scarborough to Barrie and beyond, our family-owned business delivers premium window replacement, door installation, and exterior renovation services with unmatched craftsmanship. Call us today: (416) 291-5795
Two offices
Scarborough and Barrie
Since 1989
Owner-run, family business
Our own install crew
No subcontractors
Lifetime warranty
Covers product and labour
Where we work
Cities and towns we serve
Pick your city for local details, or call (416) 291-5795 in the GTA and (705) 294-2345 in the Barrie area.
Toronto & GTA
- Toronto
- Scarborough
- North York
- Etobicoke
- Markham
- Richmond Hill
York Region
- Aurora
- Newmarket
- Stouffville
- Keswick
- Sharon
Barrie & Simcoe County
Peel & Halton
- Mississauga
- Oakville
- Milton
- Georgetown
- Bolton
Why Fortress
Why Choose Fortress Windows & Doors for Your Home
Since 1989, Fortress Windows & Doors has built a reputation as one of Southern Ontario’s most trusted window and door companies. As a family-owned, 100% Canadian business, we take pride in delivering superior craftsmanship, energy-efficient solutions, and personalized service that national chains simply can’t match. We’ve earned Best of HomeStars 12 times, including 2026, maintain full licensing and insurance, and back our work with the industry’s most comprehensive warranty.
From your initial consultation to final installation and beyond, our experienced team manages every detail of your project. We listen to your needs, respect your home, and deliver on our promises. Whether you’re upgrading a single window or transforming your entire home’s exterior, you’ll work directly with skilled professionals who genuinely care about your satisfaction. We also give back to our community through ongoing support of Sick Kids Hospital and Princess Margaret Hospital.
- Energy Star Approved
- Modern, Contemporary Design with more glass, and less frame
- Better home security
- A quieter home; improved noise reduction from the outdoors
- No maintenance: vinyl windows are virtually maintenance-free
- Pilkington Low-E Glass Technology, engineered specifically for Canadian climates
- Wet-glazed frames and sashes on all windows; the ultimate in protection against water and wind infiltration, with added structural integrity
- Triple-fin weatherstripping with built-in anti-microbial properties, meaning no mould and better air quality
- 100% pure virgin UPVC, providing protection from fading
- Stronger hardware and structural integrity thanks to integrating galvanized steel (allows for larger, more spectacular views!)
Reviews
What our customers say
Real reviews from homeowners on Google and HomeStars.
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.
Not sure if we cover your area?
Call (416) 291-5795 in the GTA or (705) 294-2345 in the Barrie area. If we can get there, we will tell you.