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Warmcore® Aluminium Sliding Doors

The Next Generation of Sliding Doors

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If you would like to get in touch - please call us on 0115 838 4747 or email us at


The Warmcore sliding door is an advanced aluminium door with the same award winning Warmcore technology found in our market leading Alu Haus Range. This guarantees superior, thermal efficiency and will conduct less energy than other patio doors.

The Warmcore sliding door features a Safety Brake Mechanism designed to prevent trapped fingers as well as the unintentional slamming of the sliding door panel.  If you have young children or care about safety on a large glass sliding door, this innovative braking system offers and guarantees a slow opening and closing action as well as ‘soft-closing’ facility.

Warmcore sliding doors come with many innovations and features including a thermally insulated interlock, anti-prising features and even a low threshold for easy access.

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Why Choose Alu Haus?

"Aluframe brings you sophisticated design, cutting-edge manufacturing, excellent security and long-term performance."

Reasons to Choose Warmcore Aluminium Sliding Doors

We’ve taken the best bifold door technology and improved it

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    A captive pivot roller mechanism delivering a safer sliding operation

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    Thermal Efficient

    25% more thermally efficient than other Aluminium windows

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    10 Years Guarantee

    Built to stand the test of time and give you peace of mind

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    Safety Break

    'Soft Closing' to prevent trapped fingers and unintentional slamming

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    Low Threshold

    Provide the best access to all through our low threshold finishes

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    Flush Door Handles

    Bespoke designed handles maintain a clean aesthetic, not found on any other sliding door on the market

Your door. Your way.

Choose from our premium colours to fit your home

Choose from our various colour options by creating your solid or dual colour bifold door designs to suit your modern contemporary aspirations.

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  • Pebble Grey

  • Slate Grey

  • Anthracite Grey

  • Pure White

  • Cream

  • Lavender Haze

  • Telegrey 4

  • Telegrey 2

  • Dusty Grey

  • Jet Black

  • Deep Saxe Blue

  • Light Admiralty Grey

  • Traffic White

  • Smoke Grey

  • Antelope

What is Warmcore

Warmcore is a warm aluminium system created out of a desire to combine the desirability and durability of aluminium with exceptional thermal performance.


Superior Thermal Performance

Warmcore beats all its competitors and is designed specifically to offer superior thermal performance.


Saves you Money

Superior performance brings energy savings and reduces your home energy costs.


Style with Performance

With smooth, sleek and slimline profiles to the stylish sash options, Warmcore provides elegant style with thermal performance

Warmcore® U-Value Performance

What is a u-value? U-values measure how effective a material is as an insulator. The lower the U-value is, the better the material is as a heat insulator. Current Part L Building Regulations require a U-Value of 1.8 W/m2k for replacement doors.

Warmcore U-Value Performance Graph

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