Alunet Bifolds

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Alunet Bifolds

Upgrade your home with Alunet bifold doors, designed for style, strength, and effortless operation. Available in a range of sash sizes, frame colours, and glass options, these aluminium bifolds bring seamless indoor-outdoor living to any space.

Perfect for patios, extensions, or open-plan living areas, Alunet bifold doors maximize natural light, improve energy efficiency, and add contemporary elegance. Built for durability and low maintenance, they combine functionality with modern design.

Select your Alunet bifold doors today – with free UK delivery and flexible buy now, pay later options.

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Alunet Bifolds, All Bifold Doors

3 Pane Aluminium Bifold Door
From £2,002.27£1,668.56 Inc. VATEx. VAT

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Alunet Bifolds, All Bifold Doors

4 Pane Aluminium Bifold Door
From £2,660.45£2,217.04 Inc. VATEx. VAT

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Alunet Bifolds, All Bifold Doors

5 Pane Aluminium Bifold Door
From £3,395.45£2,829.54 Inc. VATEx. VAT

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Alunet Bifolds, All Bifold Doors

6 Pane Aluminium Bifold Door
From £3,938.44£3,282.03 Inc. VATEx. VAT

Select options This product has multiple variants. The options may be chosen on the product page

The Aluna Bifold Door System

Transform your space with Aluna aluminium bifold doors — a perfect blend of performance, strength, and style. Designed for versatility, this system offers configurations of up to seven panels per side (fourteen in total), allowing expansive openings that seamlessly connect indoor and outdoor living spaces.

These bespoke bifold doors can open inward or outward, from either side, to suit your home’s layout. The moving corner post option creates stunning right-angled openings, ideal for modern extensions or garden rooms. With precision-engineered hardware and smooth-gliding tracks, every Aluna system delivers effortless operation, exceptional durability, and a sleek architectural finish — making them among the best bifold doors available today.

Sleek, Stylish & Exceptionally Versatile

Crafted for those who value both design and practicality, Aluna folding bifold doors feature ultra-slim 107mm sightlines that maximise glass area and light. Each panel can reach up to 1200mm wide and 3000mm high, creating dramatic, light-filled spaces with uninterrupted views.

These aluminium bi-fold doors deliver excellent thermal efficiency — achieving U-values as low as 1.1 W/m²K with triple glazing, fully compliant with Part L regulations. The innovative clip-in bead system speeds up installation, while heavy-duty rollers ensure silky-smooth movement. Built from marine-grade aluminium and PAS24 certified, Aluna combines strength, elegance, and performance — ideal for high-end homes looking for premium bifold folding doors.

A Colour Palette to Suit Every Style

Make your made-to-measure bifold doors truly yours with a choice of beautiful finishes. The Aluna bifold range can be supplied in any RAL colour, with popular stock options including Grey 7016 (Matte), Black 9005 (Matte), White 9016 (Gloss), and modern dual-colour combinations such as Grey on White or Black on White.

For a more distinctive look, choose Textured Grey 7016 or Mill Finish. Every door is powder-coated to marine-grade standards, ensuring a long-lasting, fade-resistant finish. Whether you’re matching your exterior bifold doors to a contemporary extension or a classic property, Aluna offers the flexibility and durability to complement any design.

Technical Performance

Maximum sash size: up to 1200 mm x 3000 mm for impressive panoramic openings
Slim sightlines: just 107 mm for a minimalist, modern appearance
Security: fully PAS24:2022 compliant for enhanced protection
Glazing options: accommodates units up to 44 mm thick
Thermal efficiency: U-values as low as 1.1 W/m²K, DER B, Part L compliant
Weather performance: tested to BS 6375-1:2009 for air, water, and wind resistance
Frame depth: 73 mm slimline aluminium profile
Finish options: single or dual colour, Qualicoat-certified powder coat
Durability: supports up to 120 kg per leaf with precision-engineered rollers
Air permeability: Class 4 (600 Pa)
Water tightness: Class 9A (600 Pa)
Wind load resistance: Class A3 (1200 Pa; 1/150)

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Frequently Asked Questions

What are the benefits of the Aluna Bifold System?

The Aluna bifold system offers exceptional benefits including enhanced security, industry-leading thermal performance, superior weather resistance, and effortless installation. With its market-leading sash size, homeowners enjoy maximum visibility and uninterrupted views of their outdoor space while benefiting from a sleek, contemporary design.

Are Aluna Bifold Doors thermally efficient?

Yes. The Aluna bifold system delivers outstanding thermal efficiency, achieving Part L compliant U-values as low as 1.1 W/m²K when paired with energy-efficient glazing. This ensures superior insulation, helping homeowners reduce energy bills and maintain a comfortable indoor temperature all year round.

Are Aluna Bifold Doors safe and secure?

Absolutely. The Aluna bifold door system is PAS 24 accredited, offering top-tier protection. Combined with AluLock multi-point locking, Sweet Handles, and Ultion 3-star cylinders, the system provides anti-snap, anti-drill, and lockdown protection, making it virtually impenetrable without heavy tools — the ultimate in bifold door security.

What colours are available for Aluna Bifold Doors?

Our standard colour options include White (RAL 9016), Anthracite Grey (RAL 7016), and Black (RAL 9005). Dual colour finishes such as Grey Out/White In and Black Out/White In are also available. For bespoke projects, any RAL colour can be custom powder-coated upon request.

What sash sizes can the Aluna Bifold System achieve?

The Aluna bifold system supports market-leading sash sizes up to 1200mm x 3000mm, allowing for larger, more impressive openings and panoramic views without compromising strength or performance.

What optional extras are available with Aluna Bifolds?

Optional upgrades include the Duplex Double Hook Lock (6-point locking), low threshold options (20mm standard, 20mm rebate, or ramped), and a floating corner post for dramatic, fully open right-angled designs.

Is there a warranty for Aluna Bifold Doors?

Yes. Every Aluna bifold system comes with a 10-year manufacturer’s guarantee, ensuring long-lasting peace of mind.

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3 Pane Aluminium Bifold Door

4 Pane Aluminium Bifold Door

5 Pane Aluminium Bifold Door

6 Pane Aluminium Bifold Door

The Aluna Bifold Door System

Sleek, Stylish & Exceptionally Versatile

A Colour Palette to Suit Every Style

Technical Performance

Frequently Asked Questions