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Duraflex Product Performance

For complete peace of mind and to demonstrate the advanced performance of the Diamond Suite, each and every Duraflex product undergoes rigorous testing to ensure they meet the highest standards and are fully compliant. Duraflex holds Certificate No. FM 10093 and operates a quality managed system which complies with the requirements of BS EN ISO 9001 and EMS 514848 for ISO 14001. Duraflex Diamond Suite holds BSEN 12608 and BS 7950/BSEN 12608. KM 12894 and KM 33502.


Testing Programme

Meticulously designed and manufactured to meet the specific demands of architects, specifiers, fabricators and installers; Duraflex have an ethos of investing in design, product development and continuous improvement. For total peace of mind every product undergoes a rigorous testing programme to ensure it meets the latest regulatory standards; including all products within the suite achieving PAS 24 and BS 6375 security and weather performance. 


Thermal Performance

We are committed to designing and developing sustainable products that help protect our environment and deliver outstanding energy and thermal efficiency. The multi chamber design of our profile delivers exceptional thermal performance across our window and door systems; enabling the Diamond Suite to achieve A++32 WER as certified by the British Fenestration Ratings Council (BFRC), and U-Values as low as 0.8 when used in conjunction with high performance glass units. 

Security Performance

When fabricated and installed to a Duraflex Approved specification, the Diamond Suite is able to achieve market leading security performance, including PAS 24 Enhanced Security and Secured by Design. 


Weather Performance

Built to endure the most extreme weather conditions that the UK has to offer, our window and door systems have been successfully tested to achieve BS 6375 Severe Weather Performance. You are advised to seek guidance from the Duraflex Technical Department for specific data regarding min/max sizes, strength, wind loading calculations etc. 


Q-Lon Weatherseal

The world’s best weatherseal gasket, Q-lon is supplied in all Duraflex profile - as standard. Delivering exceptional compression recovery of 99%, the best acoustic and thermal performance, and a lifetime guarantee - as standard. 



All main profiles are of multi-chambered construction for ultimate performance. The Diamond Suite is fully welded, however a number of our products may also be mechanically jointed. All products must be fabricated in strict accordance with Duraflex technical manuals. 



Duraflex window and door systems have been designed to be compatible with a wide range of hardware, with a particular focus on safety, security and aesthetics. 


Glass and Glazing

With various glazing options available, our window and door systems can be supplied with Double or Triple glazed glass units, depending on the thermal and acoustic requirements.



Where a given project demands enhanced structural strength, steel or aluminium reinforcement sections can be incorporated (fully enclosed) within the Diamond Suite profile.