Aluna Bifold

Expertly Designed. Panoramic Sightlines. Luxury Reimagined.

With marine-grade PAS24-secure aluminium as standard and Part L compliant U-values as low as 1.1 W/m²K (DER Rating B), especially when paired with triple-glazed glass, Aluna aluminium bifold doors deliver unmatched performance, security, and style.

The super-slim profile sections of the Aluna bifold system minimise visible framework and maximise glass area, with sightlines of just 107mm from frame to sash. This creates bright, open spaces, perfect for bifold patio doors, origin bifold doors.

The Aluna Bifold System

The Aluna system offers complete flexibility, with configurations of up to seven leaves per side, creating openings of up to fourteen panels. Doors can open from either side and fold inside or outside, making it ideal for large bifold doors installations. A moving corner post allows right-angled doors to open fully, while a fixed corner option is also available.

Engineering-grade hardware ensures a smooth, effortless glide, transforming spaces with bifold patio doors crafted to outperform standard aluminium bifold doors.

Sleek, Stylish & Versatile.

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Our super-slim profiles reduce the amount of visible framework, giving you more glass, cleaner lines and beautifully clear 107mm sightlines from frame to sash on our bifold patio doors.
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Aluna aluminium bifold doors combine high-end engineering with elegant, modern finishes, creating a premium look that feels refined and effortless in any setting. These origin bifold doors are designed to elevate any home with style and sophistication.
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Designed for generous openings, each sash can be made up to 1200mm wide and 3000mm high, helping you create dramatic, light-filled spaces with large bifold doors.
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Exceptional energy performance comes as standard, with Part L compliant U-values as low as 1.1 W/m²K when triple-glazed, and 1.4 W/m²K with double glazing plus a strong DER Rating B.
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Our clever Click and Forget clip-in beads make installation faster and simpler, giving installers a smoother, more efficient fitting experience on all bifold patio doors.
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You can personalise your doors with a wide choice of handles, hardware and accessories to suit any interior or exterior style on your origin bifold doors.
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The 120kg heavy-duty wheel system ensures every door opens and closes smoothly, even on large bifold doors configurations.
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Every finish can be colour-matched across the full Aluna luxury collection, including sliders, windows and roof lights for a beautifully consistent look throughout your home.

Single Doors

French Doors

Bifolding Windows

Click & Forget Clip In Beads

Profile & Features

Click & Forget Clip-In Beads

Our Clip-in Beads are available across the entire Aluna range of bifold patio doors, origin bifold doors, and large bifold doors, offering a smarter and more efficient way to glaze each pane. Unlike traditional systems, our unique bead design works seamlessly with the Aluna profile, providing installers with far more flexibility and significantly reducing installation time.

What really sets this innovation apart is the reassuring “click” you hear as the bead locks into place on bifold patio doors and large bifold doors. There’s no need for tools, no excessive force, and no fiddly wedge gaskets, just a quick, clean, confident fit every time.

Unique Universal Lock Keep

Designed exclusively for Aluna by experienced product developers, this universal lock keep is engineered with the fabricator in mind. Suitable for both left- and right-hand configurations, it simplifies ordering, stocking and fabrication, removing the hassle of managing multiple components and reducing errors across our aluminium bifold patio doors, origin bifold doors, large bifold doors, and even expansive bifold patio doors.

It adjusts easily with a simple allen key and requires fewer screws, using just one type alongside plastic alignment packers for quick, accurate fitting. The wider faceplate increases overall strength, supported by diecast back boxes for hooks and the centre deadbolt. With a reduced hook box depth, the system avoids interference with intermediate lock configurations, ensuring a smooth, secure and dependable installation for all large bifold doors.

Glazing

Heritage Look Astragal Bars

Aluna slimmer astragal bars in 25mm or 40mm add heritage charm, while fixed transoms and luxury integral blinds elevate any bifold patio door, origin bifold door, or large bifold door.

Fixed Transom Heritage

Our premium, beautifully engineered Aluna True Divide Heritage design brings stylish, durable elegance to every window, bifold patio door, origin bifold door, large bifold door, French or single door installation.

Integral Blinds

We offer a selection of premium integral blinds designed to suit every need for bifold patio doors, origin bifold doors, and large bifold doors.

Colours

Our Aluna bifolds, French and single doors are available in any RAL colour upon request. The standard colours that we have in stock are Grey 7016 (Matte), Black 9005 (Matte), White 9016 (Gloss), Grey 7016 (Matte) on White 9016 (Gloss), Black 9005 (Matte) on White 9016 (Gloss), Textured Grey 7016 and Mill Finish.

Thresholds & Cills

Standard Threshold

The standard threshold (55mm) provides a strong weather break, keeping aluminium bifold patio doors dry and warm in all conditions. Recommended for durable external large bifold doors installations.

Low Threshold

Our Low Threshold (20mm) offers a sleek, seamless transition for aluminium bifold patio doors, though with reduced weather protection. Its lower height decreases trip risks, making it ideal for improved mobility access, safe daily movement, and child-friendly usability within modern living spaces.

Low Threshold with Ramps

When a threshold cannot recess below floor height and accessibility is required, ramps can be installed on each side of the low threshold, improving inclusive entry on aluminium large bifold doors and bifold patio doors.

Universal Aluminium Cills

Our integrated cill and threshold system enhances aluminium bifold patio doors, origin bifold doors, and large bifold doors by delivering reliable weather performance on the lowest threshold, while increasing sash height. For simple fabrication, the profile includes pre-drilled drainage slots positioned neatly along the inside face for efficient installation.

Integrated Cill & Threshold

Our integrated cill and threshold profile provides full weather rating on our lowest threshold and maximises the overall sash height of the door leaf. For ease of fabrication, the profile already has pre-drilled drainage slots along the inside face.

Technical Performance

Market-leading maximum sash size of 1200mm x 3000mm for large bifold doors
Minimal sightlines of 107mm for enhanced glass area on bifold patio doors and origin bifold doors
PAS24:2022 compliant security for aluminium bifold patio doors
Glazing thickness supported up to 44mm
Energy-efficient U-values as low as 1.1 W/m²K with a DER Rating B meeting Part L
Weather-tested to BS6375 Part 1:2009
73mm frame depth for strength and stability
Single or dual-colour options, powder-coated to marine-grade Qualicoat standards
Supports up to 120kg per leaf, ideal for large bifold doors
Engineering-grade rollers for smooth, quiet operation
Air permeability Class 4 (600 Pa)
Water tightness Class 9A (600 Pa)
Wind load resistance Class A3 (1200; 1/150)(View Configuration)-Button

View Configurations

Inspiration & Frequently Asked Questions

The Aluna Bifold System offers impressive benefits, including strong security, slim sightlines, excellent weather performance and smooth operation. Its market-leading sash sizes maximise views, while the energy-efficient design makes our aluminium bifold patio doors, origin bifold doors, and large bifold doors a reliable, stylish, and high-performing choice for any home.
Yes, Aluna bifold patio doors are highly thermally efficient, achieving Part L-compliant U-values as low as 1.1 W/m²K when paired with energy-efficient glazing. This advanced insulation helps maintain comfortable indoor temperatures and improves overall performance throughout the year in any season.
Yes, the Aluna bifold system offers exceptional security, supported by PAS24 accreditation for maximum protection. Combined with the AluLock, our aluminium origin bifold doors create a highly secure setup.

The stylish yet robust Sweet Handle is engineered to stop gripping tools from snapping the handle during a break-in. The Ultion Technology 3-star barrel delivers double sacrificial protection with an anti-lock pin and 20-point drill defence. If attacked, it enters lockdown mode, making the lock virtually impenetrable without heavy, noisy power tools.
Aluna bifolding door systems are available in three popular standard colours: White (RAL9016), Anthracite Grey (RAL7016) and Black (RAL9005). We also offer dual-colour options such as Grey Out/White In and Black Out/White In. For homes wanting something more personalised, our aluminium large bifold doors can be finished in any RAL colour on request.
Our Aluna bifold system comes with durable aluminium cills featuring pre-drilled screw ports and colour-matched plastic end caps for a clean, professional finish. All cills are available in our standard stock colours, perfectly suited to our aluminium bifold patio doors, origin bifold doors, and large bifold doors. Size options include 90mm, 150mm, 190mm and 230mm to suit a wide range of installation needs.
The Aluna bifold system offers market-leading flexibility, with sash sizes up to 1200mm x 3000mm. This allows homeowners to enjoy wider openings, brighter spaces, and the impressive panoramic views that aluminium large bifold doors are known for.
The Aluna bifold system includes a range of optional extras to suit different project needs. For added security, the Duplex Double Hook Lock upgrades the system to a 6-point locking mechanism. Additional options include a Low Threshold (20mm), Low Threshold with Rebate (40mm total) and Low Threshold with Ramps for improved accessibility. For a dramatic architectural feature, a floating corner post can be added, allowing right-angled bifold patio doors to open fully with the choice of a fixed or opening corner.

Our team is always happy to discuss extras to help you customise the perfect aluminium origin bifold doors for your project.
Yes, every Aluna system comes with a 10-year manufacturer’s guarantee, giving you complete confidence in the long-term performance and durability of your aluminium bifold patio doors, origin bifold doors, and large bifold doors. For full warranty details, simply contact our team.
All installation guides for the Aluna bifold system are available on our trade portal, where you can download fabrication manuals, installation instructions, certifications and image resources. We also offer a dedicated YouTube channel packed with helpful videos, tips and demonstrations to support installers at every stage.

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