Casement Windows
- Secure and energy-efficient designs
- Available in uPVC and aluminium
- Perfect for traditional homes and modern spaces
Rated 4.87 / 5
805 Reviews
Rated 9.92 / 10
672 Reviews
Rated 4.9 / 5
357 Reviews
Rated 4.9 / 5
68 Reviews
Rated 4.87 / 5
805 Reviews
Rated 9.92 / 10
672 Reviews
Rated 4.9 / 5
357 Reviews
Rated 4.9 / 5
68 Reviews
Product Features
Thermal Performance
A-rated energy efficiency guaranteed
Classic Aesthetic
Slim frames with heritage bars
Secure & Safe
Manufactured from industry-leading materials
Increased Natural Light
Slim frames let the light in
Custom Colours
Full RAL range available
A Variety of Heritage Window Styles
Our heritage aluminium windows offer a wide range of traditional and contemporary styles, perfect for preserving character while improving performance. Choose from fixed panes, decorative glazing options, top-hung, or side-hung configurations, all available in RAL colours and tailored to your exact specifications.
Aluminium is ideal for heritage windows due to its strength and slim profile, allowing for large panes of glass that let in natural light while maintaining the traditional look. It offers durability, thermal efficiency, and security, making it the perfect choice for period-style homes.
Why choose Heritage Windows?
Here are some reasons to consider heritage windows for your next home improvement project:
- Double glazing with A-rated insulation
- Modern security built into every frame
- Multiple window configurations
- Suitable for homes across Essex & London
- Customisable to your style
Energy Efficient Window Systems
With thermal breaks and advanced double glazing, our Heritage aluminium windows outperform older steel or uPVC windows. The result? Lower heating bills and more comfort, all year long.
- Colours
- Downloads
Choose from a variety of colours
Over 200 RAL colours available, including dual colour options for added flair.
Anthracite Grey
White
Textured Anthracite Grey
Off White
Grey
Dark Red
Gloss White
Dark Grey
Dark Brown
Dark Green
Dark Blue
Cream
Brown
Black
Download Specs & Brochures
Get full technical info, product guides, and installation tips for third parties or your own installers.Compare Window Styles
Flush Casement Windows
- Sash sits level with the frame for a clean, minimalist look
- Available in durable uPVC for strength and longevity
- Wide selection of stunning woodgrain effects and colours to choose from
Tilt and Turn Windows Essex
- Easy to clean
- Dual-opening mechanism
- Energy efficient
Bay & Bow Windows
- Stylish outward projection for more space and extra light
- Available in uPVC or aluminium materials
- Highly energy-efficient with A-rated glazing
Your Heritage Windows Questions Answered
Yes. Heritage windows are a premium upgrade from standard uPVC, offering impressive looks and energy efficiency.
Absolutely. Our range of products includes A-rated double glazing and thermal breaks for top performance.
Yes, we work across Essex and London.
Yes. Heritage windows pair beautifully with our range of doors, French doors, and bifold doors.
Visit our Essex office or send us an email — our friendly team will guide you with zero hassle.
Convenient Video Appointments Available
We offer video appointments for all our services, allowing you to get expert advice from the comfort of your home.
Book your video appointment todayRead Customer Reviews
See why homeowners trust Advanced Glazing Systems. Don’t just take it from us, discover real experiences from our happy customers!
We received a prompt and efficient service. We had excellent communication from the AGS team throughout, with reliable delivery and fitting of good quality windows.
Mary Magee
Via Trusted Trader
Great service from Start to finish. After looking around for a while I made the great decision and chose AGS. From the start Tyler was...
Read more
Sam Gleeson
Via Google
We received a prompt and efficient service. We had excellent communication from the AGS team throughout , with reliable delivery and fitting of good quality...
Read more
Customer in Greater London
Via Which?
Brilliant Company. Andy’s communication and response to any queries was excellent. Quality of work is great with affordable pricing. I can recommend them to anyone...
Read more
Raghu Kota
Via Trusted Trader
Advanced Glazing Systems Ltd have provided and outstanding service from start to finish. The door they've provided is great quality and the installation has been...
Read more
Verified Reviewer
Via Trusted Trader
AGS were very friendly and professional from the initial contact for a quote, the appointment for measuring the window and final fitting. Everyone I had...
Read more
K Louch
Via Checkatrade
We received a prompt and efficient service. We had excellent communication from the AGS team throughout, with reliable delivery and fitting of good quality windows.
Mary Magee
Via Trusted Trader
Great service from Start to finish.
After looking around for a while I made the great decision and chose AGS.
From the start Tyler was very professional and helpful on the phone, he sent me pictures by email of doors in the colours I was thinking about and also pictures of the fixtures and fittings so I could compare colours.
Tyler was very communicative throughout the whole process. On the day of installation the fitter was punctual and polite and clearly knew his stuff, door is working a dream. Especially happy with the making good and how he installed the trim, such a clean and tidy finish.
Sam Gleeson
Via Google
We received a prompt and efficient service. We had excellent communication from the AGS team throughout , with reliable delivery and fitting of good quality windows
Customer in Greater London
Via Which?
Brilliant Company. Andy’s communication and response to any queries was excellent. Quality of work is great with affordable pricing. I can recommend them to anyone considering fitting double glazing.
Raghu Kota
Via Trusted Trader
Advanced Glazing Systems Ltd have provided and outstanding service from start to finish. The door they’ve provided is great quality and the installation has been done to a high standard. Customer service has been top tier throughout and I wouldn’t hesitate to recommend them to others.
Verified Reviewer
Via Trusted Trader
AGS were very friendly and professional from the initial contact for a quote, the appointment for measuring the window and final fitting. Everyone I had dealings with were so helpful and I was kept informed throughout. I would 100% recommend AGS to anyone that needs work doing.
K Louch
Via Checkatrade
Get in touch for a free quote!
We provide completely free, no-obligation quotes for every installation project—whether it’s a small home improvement or a large-scale renovation!
