An aluminium bifold door built for modern homes
Get a QuoteDesigned to set a new benchmark in aluminium bifolding doors, the Aluna combines market-leading 107mm sightlines with impressive thermal performance and the latest PAS24:2022 security certification.
Whether your customers are opening up a kitchen extension, a garden room, or a full rear elevation, the Aluna delivers the slim aesthetics, smooth operation, and durability that modern homeowners demand.
Features
Excellent thermal efficiency
With U-values as low as 1.4 W/m²K with double glazing, plus a DER energy rating of B, the Aluna bifold helps keep homes warm, comfortable, and energy-efficient all year round.
Different configurations
Available with up to 7 leaves each way (14 in total) and sash sizes up to 1200mm wide by 3000mm high, the Aluna bifold can be tailored to suit almost any opening, style, or configuration.
Secure for peace of mind
Certified to the latest PAS24:2022 standard and crafted from marine-grade aluminium, the Aluna bifold offers unrivalled strength and peace of mind without compromising on its sleek, modern appearance.
Alunet Aluna Bifold Options
Customise your Aluna bifold door to match any project brief or customer requirement.
- Colours
- Glazing
- Hardware
- Downloads
Colours
Enhance Style with Our Colour Options
At Sterling PVCu, we offer an extensive range of colour options for our aluminium bifold doors. From classic neutrals to bold contemporary hues, our diverse palette allows you to find the perfect match for any home's style and personality.
Other RALS available
Grey
White
Black
Glazing
Energy Efficient Glazing Options
Discover a range of glazing options at Sterling to suit your specific needs. Our high-quality glazing options allow customers to design a door that perfectly matches their style and meets their requirements.
Taffeta
Stippolyte
Pelerine
Oak
Minster
Chantilly
Charcoal
Contora
Digital
Everglade
Florielle
Mayflower
Hardware
Compatible with a selection of durable, elegant and smooth functioning hardware, choose from a range of handle styles to match your installation specifications and locks that meet PAS24 security standards.
Hardware is available in a wide range of colours and finishes to easily create the right look for your sliding patio doors to complement a home’s existing design.
Downloads
A bifold door that ticks every box
The Aluna bifold door combines everything homeowners are looking for in a modern aluminium bifold — stunning slimline aesthetics, exceptional thermal efficiency, robust security, and silky smooth operation. Its market-leading 107mm sightlines flood interiors with natural light, while the flexible configuration options make it suitable for almost any property.
For installers, it’s a premium product that’s easy to sell and built to impress. Get in touch today for a free quote.
Get a QuoteTransform any space, big or small
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FAQs
Your Questions Answered.
Can’t find the answer you’re looking for? Call us today and we’ll be happy to help.
01925 818700
01925 818 700What is the Aluna bifold door?
The Aluna is a premium aluminium bifolding door system from Alunet Systems. It’s a versatile, slimline solution suitable for all bifolding door configurations, designed to deliver outstanding style, security, and thermal performance.
How slim are the Aluna's sightlines?
The Aluna bifold boasts market-leading sightlines of just 107mm, minimising the visible framework and maximising the glass area to give your customers stunning uninterrupted views.
What locking system does the Aluna bifold use?
The Aluna features a duplex double hook lock with a universal lock keep and intermediate lock configuration, providing excellent security and meeting PAS24:2022 standards. Combined with diecast back boxes and a wider faceplate, it delivers maximum security without compromising on smooth operation.
Does the Aluna bifold have a low threshold option?
Yes. The Aluna bifold range includes lower thresholds for easy installation and accessibility, making it ideal for customers with mobility issues or those wanting a seamless transition at floor level. The lowest threshold option is especially popular for modern, open-plan living spaces.
What makes the Aluna bifold system energy efficient?
The Aluna bifold system is designed for maximum thermal efficiency, with U-values as low as 1.4 W/m²K with double glazing. Its advanced thermal break technology helps create a comfortable living environment all year round while reducing heating costs for homeowners.
Testimonials
Excellent
Sterling, the only people to get your new windows and doors from. From start to completion, fantastic products, fantastic service and fantastic cost, the only company you will need.
Paul S
June 2024
Faultless Service and Installation
Sterling were considerably less expensive than several other competitors we got quotes from, but the quality of installation and the professionalism of the installers was spot on.
Rob
June 2024
Friendly and professional workmen
We have used this company numerous times and never been disappointed. Good workmen, always friendly and professional, coupled with competitive pricing and quality products and workmanship. Highly recommend.
Mrs Booth - HomePro
March 2024
Exceptionally professional
From the initial costing visit, to the surveyor's visit, to the installation, Sterling PVCu have been exceptionally professional. The staff are polite, they arrived on time each day and the...
Mrs Cummins - HomePro
March 2024
Great windows
Amazing understanding when we changed our minds. Great windows fitted with little disturbance and absolutely no mess, by fantastic workmen. Great value for money, a very transparent company that have...
Mrs Callaghan - HomePro
April 2024
Great service & gorgeous new door
The team at Sterling were great from start to finish. From brook calling to do the initial quote to my new door being installed, everyone turned up when planned. The...
Ann H
March 2024
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Areas We Serve
Based in Warrington, we are perfectly placed to serve double-glazing installers across the whole North West. With customers spanning as far afield as Hereford to Leeds and Birmingham to Blackpool, we have built a ‘sterling’ reputation as the premier trade frame fabricator in the North West.
With nine professional installation teams to call upon, we can supply and fit our quality windows and doors in Warrington, Manchester, Liverpool, Preston, Bolton, Chester and surrounding areas too. Get in touch today to see if we cover your area.
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