Replacement windows
Replacement Windows for Scarborough & Durham Region Homes
When it comes to enhancing the comfort, efficiency, and curb appeal of your home, the expertise of seasoned window contractors makes all the difference.
At Fortress Windows & Doors Inc., we bring over 37 years of experience to every project, serving homeowners in Ajax, Canada, with pride and precision.
Since 1989
Owner-run, family business
Canadian-made
Built for Ontario winters
Our own install crew
No subcontractors
Lifetime warranty
Covers product and labour
Window styles
Window Styles Offered by Fortress Windows & Doors Inc.
Canadian-made vinyl in six styles. Pick one to see how it works and where it fits.
Casement Windows
Hinged on one side and cranked open. The sash pulls tight against the frame, so it seals better than any other opening window.
Awning Windows
Hinged at the top, so they can stay open in light rain. A good fit above counters, in bathrooms and basements.
Sliding Windows
Sashes glide side to side with nothing sticking out. Made for wide, short openings like basements.
Tilt & Turn Windows
Tilts in at the top for fresh air, or swings in like a door for cleaning.
Bay & Bow Windows
Three or more windows that push the room outward for more light and space.
Single & Double Hung
The traditional look, with sashes that tilt in so you can clean them from inside.
Why Fortress
Why Homeowners Choose Fortress Windows and Doors Inc.
A professional window installation contractor ensures more than just placing new windows; we ensure optimal performance through careful measurements, advanced techniques, and the use of premium materials. With our A+ rating from the Better Business Bureau and recognition as a 12-time Best of Homestars winner, you can trust that our work not only meets but exceeds industry standards.
- Optimal Performance
- High Quality Materials
- Lasting Durability
- A+ Ratings
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.
Related services
Other work we do
Get a free window quote
One written price, measured by an owner. Call (416) 291-5795 or book online.