Engineered in Leeds
Precision Metal Systems for Architectural Vision
0.8 W/m²K
U-value
42 dB
Acoustic
PAS 24
Security
4 Weeks
Lead Time
Our Frame Systems
Explore our range of thermally broken aluminum, heavy-duty steel, and bespoke curtain walling systems, engineered for performance and compliance.
Slimline Aluminum Windows
Heavy-Duty Steel Doors
Bespoke Curtain Walling
Ultra-slim sightlines and advanced thermal breaks deliver superior energy efficiency and minimalist aesthetics for modern facades.
Robust, fire-rated assemblies and structural glazed screens provide uncompromised security and durability for high-traffic environments.
Custom-engineered curtain walling systems, precisely fabricated to integrate seamlessly with complex architectural designs and specifications.
Third-Party Verified
Our systems consistently meet and exceed U-value, acoustic, and security standards, providing verifiable performance data for every project.
NN Doors & Windows Technical Team
Ready to Specify Your Next Project?
Send us your CAD files directly for precise quotation and expert technical support from our Leeds factory.