Window Replacement & Installation in London, ON
Old windows do more than look tired — they leak heat, let in noise, and drive up your energy bills every winter. We install high-performance replacement windows built for Ontario's climate, from standard double-hung to custom shapes. Every installation includes proper insulation, flashing, and interior trim so the job is done right, not just done fast.
What's included
- Double-pane low-E glass standard, with triple-pane available as an upgrade
- Argon gas fill for improved insulation
- Professional measurement and custom sizing
- Full interior and exterior trim finishing
- Proper flashing and weatherproofing
- Lifetime manufacturer warranty on most products
- Workmanship guarantee on installation
- May qualify for Canada Greener Homes Grant rebates
- Reduced energy costs — often noticeable within the first season
Windows We Install
A range of windows options to suit your home and budget.
Casement Windows
Side-hinged windows that crank open for full ventilation and a tight seal when closed. One of the most energy-efficient styles available.
Single-Hung Windows
Traditional design with a fixed upper sash and an operable lower sash. Cost-effective and reliable, with a classic look that suits most homes.
Double-Hung Windows
Classic top-and-bottom sliding sash design. Both sashes tilt inward for easy cleaning from inside your home.
Bay & Bow Windows
Projecting window assemblies that add depth, light, and architectural character to any room.
Slider Windows
Horizontal sliding windows ideal for wider openings. Low-profile hardware and smooth glide operation.
Awning Windows
Top-hinged windows that open outward, allowing ventilation even during light rain. Great for basements and bathrooms.
Custom & Specialty Shapes
Round tops, geometric shapes, and architectural windows built to match your home's unique character.
Picture Windows
Fixed, non-opening windows for maximum light and unobstructed views. Often paired with operable windows on either side.
Basement & Egress Windows
Code-compliant egress windows for finished basements. Proper sizing, well installation, and permit coordination included.
Why Choose Ridgestone for Your Windows
One Point of Contact
Marko personally manages your project from first quote to final walk-through. You deal with the owner, not a rotating cast of sales reps.
Fully Insured
Full liability coverage and WSIB compliance. Your property is protected from day one.
Honest Pricing
Detailed written quotes with no hidden fees or bait-and-switch tactics. The quote you get is the quote we work to.
London-Based
We live and work here. Not a franchise, not a call centre — a local company owned and run by the person you'll actually deal with.
Clean, Professional Work
We respect your property. Job sites are kept clean and the work is done to a standard we'd accept on our own homes.
On Time, On Budget
We show up when we say we will and finish when we say we will. No ghosting, no endless delays.
What Customers Are Saying
Love my new windows! Quick installation done by experts.
Emily
London, ON · May 2026
How It Works
A straightforward process from first call to finished project.
Request a Quote
Tell us about your project. We'll be in touch shortly to set up an on-site visit.
On-Site Consultation
We visit your home, take measurements, discuss options, and provide a detailed written quote.
Professional Installation
Our crew handles the work — clean, efficient, and finished to a standard we stand behind.
Final Walkthrough
We walk through the completed work with you, answer any questions, and make sure you're satisfied.
Common Windows Questions
Products We Trust
We source from manufacturers with proven track records and warranties we stand behind.
Let's talk about your project.
Honest quote in writing. No pressure, no franchise upsell.
Tell Me About Your Project
I'll come out, take measurements, and write you an honest quote. No pressure, no franchise upsell.