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Why choose a WarmCore Bi Fold Door?

Whether you are tucked up inside watching TV with your WarmCore folding sliding doors protecting you from the elements, or hosting a garden party with the doors wide open on a bright spring day, you can be assured your doors will look pristine.

Trade, Supply Only & DIY Friendly

The flexibility of Warmcore Bi Folding Door is perfect for tradesmen and those looking to try a little DIY.  With nationwide delivery we can have any standard colour configuration set of doors turned around in 2 weeks!

Available in a choice of 4 powder coated colours, WarmCore allows you to pick a different colour for each side of your door – at no extra cost.

Your choice helps define the personality of your door and helps match the architectural style of your home. Want grey outside with white inside to leave you free to change your interior in the future? – with WarmCore that’s no problem.

Customise-able Options

Whatever the style of your home, WarmCore folding sliding doors have the options that enable you to create the door that matches your needs.

Available in a choice of 3 hard-wearing powder coated finishes, WarmCore’s unique composite construction enables you to choose a different colour for the interior of your door from the outside, at no extra cost.

There is also a choice of 4 external aluminium designs for the door sashes, 4 threshold options and a choice of 3 handle finishes, Matt Black, Brushed Graphite and Satin Silver.

Thermal Performance

The result is an innovative ‘warm aluminium’ frame construction, carefully dimensioned to provide an optimised 70mm front-to-back overall sash depth, while ensuring market-leading thermal performance thanks to the multi-chambered insulating core.

At the heart of WarmCore products is a thermal core which significantly outperforms the polyamide thermal breaks commonly used to reduce the threat of cold bridging on aluminium windows and doors.

Dedicated Warmcore Department

For Warmcore (only) related enquiries please email relevant plans, drawings and information to our dedicated Warmcore department via:


Alternatively, if you would like a quote for Warmcore Bi Folds (only), feel free to use the Warmcore Door Designer below.

Supply Only Warmcore Door Designer

Three powder coated colour options

Available in a choice of 3 powder coated colours, WarmCore allows you to pick a different colour for each side of your door. Your choice helps define the personality of your door and helps match the architectural style of your home.

RAL 7016

WarmCore Door Configurations

Single Door

French Door

3 panel Door

4 panel Door

Personalise your WarmCore

External Styling

A choice of 4 external aluminium door sash designs, ranging from a contemporary pencil round to a decorative sculptured look, enables you to personalise your new WarmCore door to match the style of your existing windows.

Dual Colour

WarmCore windows and doors come in four distinctive, modern colours and offer unrivalled thermal performance compared with traditional aluminium systems.

Threshold Options

WarmCore doors come with a range of threshold options, including ultra low Part M compliant aluminium threshold, 150mm, 120mm integrated and an outerframe option. Be confident that WarmCore has the right option for your home.

Glass Upgrades

Celsius Clear insulated glass is available as an optional upgrade on WarmCore folding sliding doors. This unique high performance glass utilises a Low-E and solar control coating.

Glazing Bead Options

WarmCore doors can be glazed with 28mm double glazed units or 44mm triple glazed units. Glazing can be carried out with a choice of aluminium beads for a neat internal finish.

Made to Measure

Warmcore doors are expertly made to measure and ready to install. Specific to your needs each door can be personalised to suit you.

Visit one of our local showrooms

now open in middlesbrough and newcastle

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Request a Quote

Interested in our products click here to complete our quote request form, one of our experts will get right back to you with a price.

Want to speak to an advisor? Give our team a call on 0800 025 8007