WarmCore - innovative aluminium folding sliding door system

WarmCore is an innovative aluminium folding sliding door system which incorporates a radically different product design approach to deliver a new high performance fenestration framing solution: “warm aluminium”. At Synerjy Ltd, we are redefining thermal performance in wide span aluminium doors.

Built around a belief that beauty doesn’t have to compromise performance, WarmCore aluminium folding sliding doors were created out of a desire to combine the desirability and durability of aluminium with unparalleled insulation. The orange thermal core – hidden away in the finished doors – is key to why WarmCore doors are 25% more thermally efficient than traditional aluminium systems.

Built with a revolutionary thermal core at its heart…

Strong and secure, WarmCore doors come with class leading security built in, backed by a comprehensive 10 year product guarantee, reinforced by the ERA Five Star security guarantee.

Inwards or outwards opening doors up to 6m wide, with as many as 7 opening sashes glide along custom designed tracks. While a wealth of colour, style and configuration options help you choose the perfect warm, secure and beautiful WarmCore door for your home.


Hi-Tech Elegance

Precision-manufactured with a high quality surface finish and affording slim sightlines when installed, aluminium has become the material of choice for premium folding sliding door applications.

An attention to detail that goes as far as creating bespoke union mouldings for gaskets ensures WarmCore outperforms the competition.

WarmCore doors utilise a composite of materials to ensure an end product that is energy efficient and recyclable combined with the premium quality, structural integrity and architectural design elegance of aluminium to create a product perfect for both residential and commercial building applications.

From the rollers to the handles to the corner assemblies, WarmCore displays an elegance of design that translates into a high performance installed product that looks outstanding.

High Strength Construction

Strong Construction Built for unparallelled Security

Hi-Strength-Cons-2From the unique 5 point lock, designed to run the full length of the door sash, to the high strength hinges and rollers; each element of the WarmCore door combines to ensure optimum security.

WarmCore’s aluminium construction, custom-made roller assemblies – sitting deep within the top and bottom tracks – and extruded aluminium hinges make them inherently strong and secure. Added security features such as integral dog bolts bind the door sashes together when closed, protecting against forced entry.

A custom designed door lock, available on no other door system, uses a 5 point locking system with 3 opposed hook locks and twin shoot bolts – that engage fully into the aluminium top and bottom tracks – helping keep you and your family safe and secure. For added peace of mind choose the optional laminate glass upgrade – giving WarmCore doors Secured by Design accreditation – the official UK Police initiative ‘designing out crime’ through physical security.

Every WarmCore door is independently certified to PAS24:2012, the benchmark in enhanced security performance requirements for doorsets and windows in the UK.

Thermal Performance

Superior Thermal Performance

At the heart of WarmCore products is a thermal core which significantly out-performs the polyamide thermal breaks commonly used to reduce the threat of cold bridging on aluminium windows and doors. The result is an innovative “warm aluminium” frame construction, carefully dimensioned to provide an optimised 70mm front-to-back overall sash frame depth while ensuring market-leading thermal performance thanks to the multi-chambered insulating core.



Fully concealed multi-chambered cores substantially improve

thermal performance when compared to thermally-broken aluminium doors:

U-value of 1.4 W/m2K with 28mm double glazing
U-value of 1.0 W/m2K with 44mm Triple glazing

Choice Styling

External Styling

Four external aluminium designs deliver a range of classic aesthetic styles:

External Styling