
BESPOKE CONFIGURATIONS
Slim Sightlines
Our Heritage fixed windows feature ultra slim 46mm sightlines for a refined look. With a patented construction method and clean corners, these aluminium windows will provide a hand touched and seamless finish for your home.
Frame Options
Thermal Performance

featuring revolutionary InsuLock technology
Inside every Endurance Aluminium fixed Heritage window is an innovative multi-chamber thermal core. The revolutionary InsuLock technology provides you with market-leading performance, ensuring every window and door complies with building regulations and keeps your home warm and comfortable.
POPULAR HERITAGE WINDOW PRODUCTS
If you had something else in mind, we also provide casement, French and bay aluminium windows. These popular configurations offer all the benefits of quality aluminium and match our door range.
LET IN LIGHT
Take a look through our gallery to find design inspiration for your home. You can view both our Heritage and Architectural fixed windows and see other projects from across the UK.
COLOURS TO SUIT YOUR UNIQUE TASTE
Our fixed casement windows are available in nine powder-coated colours, with the option for different finishes on either side of the door. Three additional premium anodised colours can also be requested for a high end finish.
TECHNICAL INFORMATION

U-VALUE AS LOW AS: 1.5
PART L COMPLIANT
PAS 24
EXPLORE OUR
MATCHING ALUMINIUM DOORS
Our doors are designed to perfectly complement our fixed Heritage windows, ensuring a seamless and stylish aesthetic throughout your home.
DOWNLOAD OUR BROCHURE
Click below to download our aluminium window and door brochures. Inside, you will find a comprehensive selection of styles, colours and hardware to browse and compare.

Want to know more?
What is the Difference between Fixed Windows and Other Window Types?
As their name suggests, fixed windows are designed to not open and have no moving parts. They are also sometimes known as picture windows. They’re ideal for areas where ventilation is not needed, or as larger windows to complement modern architecture.
What Are the Advantages of Fixed Windows?
Aluminium fixed windows are highly secure, and require less maintenance than other window configurations. They are also highly energy efficient with fewer air leaks.
Are Fixed Windows Harder to Clean?
Where fixed windows don’t open, they can be harder to clean when installed in high and hard to reach areas. For advice on this, read our general maintenance guide here.
What Rooms are Best for Fixed Windows?
Fixed aluminium windows can often be found as large picture windows in living and dining areas, bathrooms, commercial spaces or as part of a decorative window design.