SUPPLY ONLY ALUMINIUM BIFOLD DOORS – TRADE BIFOLDS UK

At 23 Doors UK, we specialise in supply only aluminium bifold doors for homeowners, builders, and trade professionals. Our sleek and durable trade bifolds are designed to maximise natural light, create open-plan living, and seamlessly connect homes and gardens.

Whether you’re a trade installer looking for competitive prices, or a homeowner sourcing direct from the factory, our supply only bifolds combine outstanding performance with unbeatable lead times.

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Why Choose 23 Doors for Supply Only Bifolds?

  • Trade Bifolds at Trade Prices – Cut out the middleman with direct-from-factory supply.
  • Fast UK Delivery – Receive trade quotations within 24 hours and glazed aluminium bifold doors in as little as 10 working days.
  • Bespoke Aluminium Bifold Doors – Tailored to your exact measurements, available in any RAL colour, with standard or flush thresholds.
  • Built for Longevity – Slim sightlines, robust aluminium frames, high security locks, and excellent thermal efficiency.
  • Dedicated Trade Support – Expert advice and customer care designed to support builders, developers, and installers.

Supply Only Bifolds – Direct to You

Our supply only bifold doors are manufactured in the UK and delivered nationwide. Perfect for trade projects, DIY installations, or builders who want reliable quality at competitive prices.

With supply only, you get complete flexibility – order exactly what you need, ready to install, with the confidence that every door has been precision-engineered for durability and style.

Aluminium Bifold Doors – Slim, Strong and Stylish

Aluminium is the material of choice for modern bifolds. Our aluminium bifold doors offer:

  • Ultra-slim profiles for maximum glass and uninterrupted views.
  • Exceptional strength and rigidity, even with large door spans.
  • Low maintenance frames that never warp, twist or fade.
  • High performance glazing for energy efficiency and comfort.

Available in multiple configurations, our aluminium bifold doors can be designed to suit any home or commercial project.

Premium Bifolding Doors

Expertly manufactured in our modern factory, our trade supply aluminium bifold doors deliver on quality, performance, and are also some of the slimmest on the market.

Latest Generation Bifolds

Insulated profiles, attractive colour finishes, and stylish hardware, with superb build quality, fit and finish.

Bespoke Bifold Doors

Made to measure to your precise sizes, configuration, colour and accessories.

Smart Design

Suitable for replacement doors or new build openings, ready to fit and glaze.

Alunet BF73 bifold doors in a modern room setting

Trade Bifolds – Built for Professionals

We understand the demands of the trade. That’s why our trade bifolds are manufactured for easy installation, quick turnaround, and lasting quality.

  • Competitive Trade Pricing – maximise your project margins.
  • Quick Quotes – get accurate trade quotations within 24 hours.
  • Rapid Lead Times – bifolds supplied and delivered when you need them.
  • Custom Options – multiple opening styles, finishes, and configurations available.

Our trade partners rely on us for reliability, consistent quality, and excellent after-sales support.

Alunet BF73 bifold doors

With superb engineering and overall design, Alunet BF73 bifold doors provide all the best possible features required from a quality bifold. Slim sightlines, premium aluminium frame profiles, robust build quality and high specifications create an affordable bifold door without compromising features. 23 DOORS are specialist manufacturers of Alunet BF73 bifold doors, carefully crafted, delivered on time and with impressive features for a fast and easy fit and glaze.

With an impressive slim door mullion sightline of just 120mm and 107mm frame to sash, Alunet BF73 bifold doors are unbelievably slim, promising genuine customer appeal and an excellent solution for residential or commercial customers. Slimmer than the leading bifold door brands, the BF73 model promises less aluminium bulk, usually a feature of patio sliding doors, larger glass sizes, more light and better, unobtrusive views. 

FAQs on Aluminium Bifolds

What are supply only bifold doors?
Supply only bifolds are delivered ready-made for you or your builder/installer to fit. This gives you flexibility, lower costs, and full control over your project.

Are aluminium bifold doors better than uPVC?
Yes. Aluminium bifolds are slimmer, stronger, more durable, and offer a more modern finish than uPVC alternatives.

Do you offer trade bifold prices?
Absolutely. We specialise in trade bifolds, offering competitive pricing, fast quotes, and UK-wide supply.

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Alunet BF73 bifold doors partially open with wood floor and patio views

Stunning and sophisticated bifold doors

Alunet BF73 bifolds come as incredibly slimline doors with a flatline profile, ideal for almost any property. A choice of cills, ancillary profiles, extension pieces and add-on sections ensures the doors can perfectly integrate within any new or existing opening.

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Secure and Energy Efficient

Alunet BF73 bifold doors can achieve incredibly low U-Values. Premium door hardware with multi-pointAlunet BF73 bifold doors locking and security cylinder provides protection, and tested to PAS24:2016 and Document Q for new build homes.

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Alunet BF73 bifold doors grey colour, closed outside view with integral blinds.
cross section drawing of Alunet BF73 bifold doors

Key Features

  • Thin 107mm mullions.
  • Panels up to 1.2m wide and 3.0m high.
  • Secure, insulated and weather-resistant.
  • Option of an integrated 150mm cill
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Standard and non-standard Colour options

We supply our bi-folds in black, white and anthracite grey as standard, but we can offer any bespoke colour option on request.

Black

White

Anthracite Grey

RAL Colours

Industry leading design

One of the newest doors on the market, Alunet BF73 bifold doors, are designed by Alunet Systems, a leading systems company in the UK. The extruded aluminium profiles are created to the latest performance standards, with a professionally applied powder-coated finish. The renowned Debar brand of hardware provides a smooth slide-and-fold action, operates and secures the intermediate panels and ensures your new bifold doors are functional, reliable, long-lasting and low-maintenance.

Experienced fabrication

Manufactured by us with precision and care, our trade supply bifold doors service is efficient and reliable, with our doors provided at impressive prices and lead times. Your door leaves are provided fully fabricated, with the outer frame in easy-to-assemble kit form. Glazing beads, cills, and add-on extension pieces are provided cut to size. Accompanying your bifold doors is easy to identify component kits and full installation instructions. Alunet BF73 bifold doors also come with an adjustable frame jamb, making final adjustments a breeze.

Why aluminium?

Slimmer than PVCu or timber, with less thermal expansion and optimum reliability. Aluminium bifolds are trusted for their strength, smooth operation, virtually unlimited colour choice and impressive design. The insulated profiles work with high-specification safety glass creating energy-efficient doors and helping save money on energy bills.

Virtually unlimited designs

When you choose Alunet BF73 bifold doors, you benefit from a fully flexible product. Doors can open in or out, with panels sliding in one direction or split to stack on each side. Numerous configurations include fixed or open corner designs of up to 7 panels each side, with built-in French or single doors. Even better, designed with a traffic door, you can use the doors just like a regular access door without having to fold all the panels back.

Oversized bifold doors

With door panels up to an impressive 1.2m wide and 3.0m high, Alunet BF73 bifold doors work in virtually any design, from a standard door opening up to architect designed project maximising the use of glass and slimline aluminium.

Looking for single/French doors?

Creating a complete home solution, we can also manufacture single or double doors for other door openings on a project. Created with the same slim bifold profiles, you benefit from matching aluminium doors from the profile design right up to the door hardware. And they come in larger sizes than other residential door systems, removing the need for additional toplights or side panels.

Help and advice

23 DOORS are expert bifold manufacturers and can answer any of your questions relating to buying, choosing or understanding this popular, functional and stylish patio door. Contact us for expert help and advice.

How can I tell when bifold doors are high quality?

Premium aluminium profiles, a durable and high-quality colour finish, excellent components and a smooth sliding and folding action.  These are the best ways of identifying a quality bifold door.  

What is the advantage of a bifold door?

There are certain features you only get with a bifold, which is why they remain a popular product. Bifolds are the only doors that can open up your entire opening.  At the same time, only a bifold gives you the functionality of hinged doors with the benefit of folding fully open when configured with a traffic door.  Bifold doors also come with external key access, which is hard to get with sliding doors, letting you use your bifolds to get into a property.  Finally, bifold doors come made as single or double doors, giving you matching exterior doors throughout your property and are available at bigger door sizes than regular hinged doors. 

Which bifold doors are best?

The best bifolding doors are those that offer a combination of the best features. Slim sightlines are desirable, as the closed doors give you more glass, less visible aluminium, more light and better views.  Thermally enhanced profiles make the best bifold doors very energy-efficient. Above all, ensure your bifold doors are well-made and expertly fitted and you’ll get long-lasting, reliable, functional and secure doors. 

Why should I choose Alunet BF73 bifold doors?

Alunet BF73 bifold doors deliver some of the best features and highest specifications you can get in a bifold at a fantastic price. First of all, they are one of the slimmest bifold doors on the market, with a 107mm mullion sightline. Next is their impressive size capability, with door leaves up to 1200mm wide and up to 3000mm high. They create matching single or double doors and even front doors, and you can customise them with the on-trend steel look. They even come with features that make fitting them a breeze compared to other bifold doors. 

What are the different types of bifold doors?

The different types of bifold doors depend on the size of your opening.  Bifold doors start from two panels all the way up to seven or more.  They can open in or out, they can all slide to one side or split to both sides.  They are available with a low threshold connecting inside floors to outside decking or slabs. Bifold doors also come in the industrial, heritage or steel look, as fixed or open corner designs and can even work inside the home as stylish room dividers. 

Why are bifold doors no longer popular?

Bifold doors remain incredibly popular with features and functionality you can’t get with sliding or traditional hinged doors.  They are reliable, secure, and energy-efficient.  Chosen right, they are also slimmer than French doors. Even better, bifolds can be better than other doors in smaller houses because they fully open, connecting the room to the outside space and making the room and home feel larger, brighter and more spacious. 

What are the problems with bifold doors?

There is no problem with modern bifold doors when properly made and, importantly, correctly fitted. It is bad manufacturing and installation that causes problems with bifold doors, not the product itself.  Assuming you choose a quality bifold from a reliable manufacturer and installer, these doors will serve you very well for many years. 

Do bifold doors make a room cold?

No. All doors intended for the outside of a property come with thermally insulated aluminium profiles.  These insulated profiles work with high-specification safety glass and create a door with excellent insulation and low U-Values, helping lower your energy bills. 

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