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100% European Quality
Premium European Aluminum Windows, Doors & Tilt and Turn Systems in Markham, ON
At Double G Windows & Doors, we specialize in premium European aluminum windows and doors — including advanced tilt and turn windows for superior ventilation, security, and energy efficiency. Our products are crafted with high-quality European profiles and engineered to meet the highest standards of modern design, durability, and performance.
About GG Windows & Doors
For over 20 years, homeowners across Europe have trusted our aluminum windows and doors. Now, they’re available in the GTA. Combining top-notch German-Slovak engineering with elegant European design they bring lasting quality, style, and comfort to modern Canadian homes.
What makes GG Windows & Doors different?
True luxury isn’t just how something looks – it’s how it works. We bring Markham, ON the highest European standards of quality and innovation. We specialize only in European windows and doors.
We’re proud to be a Markham-based business with a focus on craftsmanship, service, and integrity. When you choose us you’re not just getting windows. You’re getting decades of expertise, and a piece of European excellence that will elevate your home or business for generations.
Modern Luxury
Engineered to Last
Satisfaction Guaranteed
Why Choose GG Windows & Doors?
20+ Years of Window Industry Expertise
European-Engineered Quality
100% Satisfaction Promise
Specialists in High-End Residential & Commercial Projects
Markham’s Source for Premium European Windows
What Our Customers Say About Us?
Total professional. Went way beyond my expectations.
John C.
I was very impressed with the installers' professionalism and attention to detail. I would highly recommend GG!
Milan S.
We got our windows and doors replaced, and I’m very impressed - the quality is exceptional. They did a great job and offered us several options. Replacing windows and doors in an old house isn’t always easy, but George and Peter were very polite and professional. I would recommend this company anytime.
Tomas G.
Modern Luxury
Engineered to Last
Satisfaction Guaranteed
Aluminum Windows in Markham, ON
Discover the best of European window design right here in Markham with our premium aluminum windows. Made in Europe using top-tier german profiles and cutting-edge technology, these windows combine sleek design, excellent thermal performance, and lasting durability. They’re not just windows – they’re a stylish upgrade that brings European elegance and comfort to your home.
- Ultra-slim aluminum profiles for maximum glass area
- Advanced multi-point locking systems for security
- Superior thermal insulation exceeding Canadian standards
- Precision German hardware and mechanisms
- Custom colors and finishes to match your vision
- Triple-glazed performance as standard
Aluminum Front Doors In Markham, ON
Our luxury European doors are engineered for both beauty and performance – offering seamless design, structural integrity, and enhanced security perfect for properties. Whether you need a statement entryway for your Markham home or minimalist interior solutions.
What Sets Our Doors Apart:
- Matching door and window systems for design consistency
- Advanced insulation and acoustic performance
- Contemporary European panel styles and finishes
- Optional smart-lock and keyless entry technologies
- Weather-sealed for superior performance in the Canadian climate
- Fully customizable sizing and hardware options to suit diverse Toronto architectural styles.
Patio Doors in Markham, ON
Our sliding and folding patio doors are all about bringing the outside in whether you’re hosting friends, enjoying a quiet coffee, or just want more light and space. Designed with top-tier European engineering, they look amazing and work even better.
Why Homeowners Love These Patio Doors:
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Huge glass panels give you wide-open views
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Super smooth glide – thanks to German hardware that lasts
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Weather-sealed so you’re ready for all four Canadian seasons
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Multiple ways to open – even those fancy corner-less setups
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Aluminum frames with thermal breaks keep things warm without the bulk
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Great for patios, balconies, and wide open living spaces
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Fits perfectly in modern homes, luxury condos, or sleek commercial builds
Perfect for contemporary homes, penthouses, and upscale commercial properties.
Premium Windows and Doors for Commercial Projects
Transform commercial spaces with our windows and doors designed for high-performance commercial applications. From luxury Markham condominiums to prestigious office buildings, our aluminum window systems deliver the sophistication and reliability that Toronto’s commercial market demands.
- Volume housing solutions for Canadian developers
- Energy-efficient European systems for sustainable Markham building
- Architectural flexibility for creative Markham design projects
- Project management and installation coordination
Ready to Experience True Luxury in Markham?
Why settle for standard windows when your Markham home deserves the best? With over 20 years of experience, GG Windows & Doors brings European aluminum window design to life, combining expert craftsmanship with service you can trust.
We proudly serve the Greater Toronto Area, including Toronto, Mississauga, Etobicoke, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington, Milton, Pickering, Ajax, Whitby, Oshawa, Aurora, Newmarket, King City, and Caledon. We also love taking trips up to Muskoka.
The #1 European Aluminum Window Specialists in Markham Proudly Serving Our Community
Why GG Windows & Doors Make a Difference in Markham, ON?
As window specialists here in Markham, Canada we really get what this climate throws at buildings. Hot, humid summers push thermal performance to the limit, and those freezing winters? Yeah they demand serious insulation. That’s exactly why European windows are such a game changer – but not just any windows. You need the right systems that can handle Markham year round.
Why European Luxury Windows Make a Difference in Canada
We focus only on high-end European windows. That’s our thing. We know which manufacturers make systems that perform best in our climate, and which ones actually look right on the different styles of homes across the city – from old-school heritage houses to sleek modern builds.
European Quality, Installed by Toronto Experts
Thanks to our close partnership with top European manufacturers, we can bring the latest aluminum window tech straight from Slovakia – made with precision German engineering and install it right here with a local Markham crew. No flying in technicians from Europe no crazy wait times. Just high-performance windows backed by people who actually live and work here 🙂
Modern Luxury
Engineered to Last
Satisfaction Guaranteed
Our Window Installation Process
From Start to Finish: Our 5-Step window & door installation
When we arrive at your property, we don’t just measure and install standard windows — we take a completely different approach. Our team brings authentic European craftsmanship to every project, combining precision, design, and performance.
We start with a detailed property assessment to understand your structure, goals, and style. From there, we provide clear specs and visual plans so you know exactly what to expect.
Your custom windows are then crafted by our partners in Slovakia, with rigorous quality checks and factory inspections before they ever reach Markham.
Whether it’s a new installation or a full replacement, our team uses specialized techniques designed for European aluminum systems — ensuring a flawless fit and lasting performance.
Every step is handled with care and attention to detail, so you get windows and doors that look beautiful, perform perfectly, and feel truly built for your home.
Windows and doors installation in Markham, ON
Our installation team uses techniques that go beyond standard window installation practices. For luxury Markham properties, heritage buildings, or complex architectural projects we offer specialized services including structural reinforcement consultation, custom flashing systems and integration with smart home technologies
We also provide comprehensive project management for large-scale Markham installations, coordinating with architects general contractors, and other trades to ensure seamless integration of your European windows into your overall Toronto project timeline.
Trusted Expert Service •
100% European Quality
The Benefits of European Aluminum Windows and Doors
Did you know that premium European windows can last 50+ years with proper maintenance, compared to 15-20 years for standard Canadian windows? When you invest in European luxury windows from GG Windows And Doors you are not just getting superior aesthetics and performance – you’re making a long-term investment in your Markham property’s value and your family’s comfort.
Many of our clients report immediate benefits after window installation, including dramatically improved thermal comfort, virtually eliminated drafts, significant noise reduction, and enhanced security. But the benefits extend far beyond immediate comfort improvements for Markham homeowners.
European aluminum windows deliver superior energy efficiency, potentially reducing heating and cooling costs by up to 30%. Their advanced thermal break technology and precision manufacturing eliminate the air leakage that plagues standard windows. Plus when your HVAC system doesn’t have to compensate for poor window performance, it operates more efficiently and lasts longer.
A common question we hear is: How long do our windows last? While every home and building is different, high-quality European aluminum windows typically offer over 50 years of reliable, low-maintenance performance. For properties exposed to harsher conditions like lakeside homes or busy commercial buildings we recommend a proactive maintenance plan to ensure they keep performing at their best. At GG Windows & Doors, we’re here to help you choose the right solution for your space – built to last, perform, and impress.
Frequently Asked Questions
Still have questions about our windows or doors? We’ve compiled answers to the most common questions our clients ask us. If you don’t see your question answered here, just give GG Windows & Doors a call!
How much do European luxury windows cost in Ontario, Canada?
The cost of European luxury windows from GG Windows & Doors varies depending on several factors, including window size, configuration complexity, hardware options, and installation requirements. GG Windows & Doors always provides detailed, transparent pricing before beginning any Toronto project, ensuring no surprises.
How do European windows compare to Canadian windows?
European Aluminum windows from GG Windows and Doors offer significant advantages in thermal performance, durability, security, and design flexibility. European aluminium windows typically feature superior thermal breaks, multi-point locking mechanisms, inward-opening designs, and precise manufacturing tolerances that surpass North American standards. The result is windows that perform better and last longer in Toronto conditions.
How long does Aluminum window installation take in Toronto GTA?
The installation time for Aliminum windows depends on the size of your home – but we’re known for fast, efficient service without compromising on quality.
From the moment you place your deposit, it typically takes about 18 to 22 weeks for your European windows to be fully installed. This includes the time needed for custom manufacturing in Europe, overseas shipping, and professional installation here in Toronto. We keep you updated every step of the way to make the process smooth and stress-free.
Are GG aluminum windows certified in Canada?
Yes, our Aluminum windows meet and exceed Canadian building codes and energy efficiency standards. All GG Windows And Doors windows are tested and certified for Canadian climate conditions, including thermal performance, structural integrity and air/water infiltration resistance, ensuring perfect compliance for Toronto installations.
What warranty do you include?
European luxury windows from GG Windows & Doors typically include comprehensive manufacturer warranties of 10-20 years on hardware and thermal performance, with lifetime warranties on frame and glass components. We also provide Toronto installation warranties and ongoing service support.
Can European windows be customized?
European windows from GG Windows And Doors provide outstanding customisation options, including custom colors, hardware finishes, glass options, and configuration possibilities. Our partnership with premium European manufacturers provides Toronto clients access to hundreds of customization options to match any architectural vision.
