Duration’s Aluminium Heritage Windows


This aluminium window system is designed as a extremely slim-line thermally efficient replacement for steel windows. Our Heritage windows use the latest ‘Polyamide’ thermal break technology, has complete and authentic range of furniture, replica steel look-a-like profiles and is still a fraction of the cost of steel windows. Due it‘s high specifications our Heritage Windows are suitable for NEW BUILD as well as replacement or refurbishment projects and can (and has been) approved for use in Grade II listed buildings and conservation areas. When combined with our patented Ste’alth Secure™ Locking, it makes for an incredibly strong and secure Heritage window.

Heritage Windows

Aluminium Heritage Windows - Security features

Incorporate Our Ste’alth Secure™ Stealth Plane Locking System

If you wish to keep the authentic furniture of a traditional window but also want to upgrade to modern locking system it is possible to do so with our patented Ste’alth Secure™ Locking. Our brand new protected Ste’alth Secure™ Locking is now on demonstration in our showroom. The Ste’alths is available as a "peg and stay" driven system, or handle driven system.

In order to add the Ste’alth Secure™ locking system to our Heritage window you need to use our purpose built Ste’alth sash. What makes our Ste’alth Secure™ locking unique is that the opening movement of the handle actuates the modern multi-point locking - securing the window on three sides in at least six positions.
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High security profile related Butt hinges

These butt hinges are designed specifically for the Heritage window profile and incorporate sash jammers. If someone was to remove the exposed part of the butt hinge the window is still secured along the hinge edge.
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Internally Beaded

A window that is internally glazed is easier to fit in multi-story buildings; as you fit the glass and the glazing bead from inside of the building. Therefore scaffolding is not required. It is also a security feature because in order to de-glaze the window, not only do you need the right tools and the knowledge, but it is only possible to do so from inside the building.

Concealed Handle Fixings

The handles cannot be unscrewed or removed to get at the locking mechanisms. This is due to the fact that the fixing screws are concealed under the glazing bead, the visible screws on the Authentic handles are fake and are for aesthetics only. So you cannot remove the handles without first de-glazing the window.
Available Handles »

Key Locking Handles

The handles have a key locking facility, which drives a grub screw into the handles back plate to prevent the handle from being operated. The fact that these handles are key locking means that you are covered by your insurance.
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Secure Night Vent Facility

The secure night vent facility allows the window to be slightly open in a locked position, that allows ventilation.

Build your own Heritage window from the options you see here, using our online Heritage Window Builder »

NBSPlus Logo We are featured on RIBA product selector, Royal Institute of British Architects We have been approved by BM Trada - certificate number 105 BFRC logo We are a supplier to the Ministry of Justice Rehau authorised partner Smarts Systems approved fabricator. We are the largest supplier of Smart products in the UK. Blyweert authorised partner, approved fabricator of Blyweert Beaufort products Twitter