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We're excited to introduce our new WarmCore aluminium bifold door system, fabricated locally in Derbyshire.
WarmCore combines the strength and elegance of aluminium with outstanding thermal performance, delivering slim sightlines, enhanced security and impressive energy efficiency without compromising on style.
Designed for modern extensions, renovations and open-plan living, WarmCore bifolds create bright, spacious interiors while seamlessly connecting your home with the outdoors.
Traditional aluminium systems have always offered exceptional strength, durability and contemporary aesthetics. However, earlier generations of aluminium frames often struggled to achieve the levels of thermal performance homeowners now expect. Moving forward this will be a minimum requirement for new builds and renovations alike.
While many systems rely on thermal breaks to reduce heat transfer, WarmCore was designed from the outset with energy efficiency at its heart.
By combining a high-performance insulated core with premium aluminium outer skins, WarmCore delivers impressive U-values, excellent structural integrity and beautiful slimline aesthetics in one innovative system.
Exceptional insulation helping to reduce heat loss and improve comfort.
Maximise glazing areas and natural light.
Advanced locking systems and robust construction.
Powder-coated aluminium requiring minimal upkeep.
Locally fabricated and installed by Ashfen.

Ideal for smaller openings and garden rooms.

Probably the most popular layout for kitchen extensions because it gives an everyday traffic door.

Symmetrical opening from the centre.

Works well for wider openings while retaining a traffic door.

Excellent for large contemporary extensions and gives a balanced central opening.

Excellent for large open spaces onto gardens because of the quick access traffic door.
We have other configurations available. Please contact us for details.
WarmCore aluminium bifold doors are available in a wide choice of colours and finishes, from contemporary Anthracite Grey and Jet Black to classic White and bespoke RAL options. Whether you're creating a modern extension or renovating a traditional property, WarmCore offers the flexibility to achieve a truly personalised look.
Finished with a high-quality powder coating for exceptional durability and weather resistance, WarmCore bifold doors are designed to retain their appearance for years to come while requiring very little maintenance.
We love our customers, so feel free to get in touch on the above form or using the Whatsapp button below.
Ashfen Windows & Doors Ltd
Unit 15, Dunstall Park Road, Derby DE24 8HJ