The Diamond Suite

Duraflex offer arguably the most extensive range of PVCu products on the market.

Aluminium Bi-Fold Doors

Slim and simple sitelines. Sleeker and more pleasing design.

High Performing System

Benefit from the Duraflex high performance BFRC Energy Rated System.

Complete Solution

The products and service to keep you ahead of the competition.

Welcome to Duraflex - Making the Difference

Duraflex is one of the largest extruders of PVCU profile for the Window Industry in the UK, established for over 60 years, we supply the high performing Diamond Suite to meet the ever-changing needs of Householders, Builders, Developers, Local Authorities and Housing Associations through a nationwide network of window fabricators and installers. Supported by a full-service solution, covering marketing, technical and sales support, Duraflex offer the complete solution to support your needs. Servicing our customers from a dedicated, purpose built 275,000sq/ft facility in Tewkesbury, Gloucestershire, Duraflex operates to the latest quality standards covering ISO 18001 and ISO 9001 to deliver the highest quality products and service for our customers.


Product RangeThe Diamond Suite

Explore Our Product Range

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BIM Centre


In a competitive market you need asupplier who you can rely on

The complete solution from Duraflex and the MASCO UK Window Group, delivering a robust sustainable future for your business with the ability to provide the most complete range of products and service in the industry.


Aluminium Bi-Fold

Our aluminium bi-fold delivers both performance and aesthetics, matching the sightlines of the Duraflex Diamond Suite.

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Q-Lon Gasket

The best performing gasket in the world, with lifetime guarantee - fitted as standard across the Diamond Suite.

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Flush Casement

Our new Flush Casement combines traditional aesthetics with modern multi-chambered performance.

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