Why choose AB-38 Bifold Doors

The AB-38 comes extruded by Alumil, who are a global systems company with a presence in most countries. Alumil’s reputation is extensive, and their products are installed in famous landmarks and buildings. You will find their products specified by Foster and Partners, fitted in Google’s headquarters and their residential windows and doors fitted for high-end homes, new build flats and apartments.

Every component has been engineered for strength, security, and long-term reliability while maintaining minimalist sightlines that make your home feel brighter and more connected to the outdoors.

88 mm glass-to-glass sightline – more glass and less visible aluminium.

Excellent U-values from just 1.1 W/m2K, saving money on your energy bills.

Panel sizes up to 1.3 m wide or 3.5 m high, giving you fewer folding panels.

Effortless folding action, thanks to sophisticated quadruple rollers promising smooth, balanced operation.

Matching single and double doors, also the UK’s slimmest with a mere 44 mm door sightline,

Durable and secure, with AB-38 bifold doors tested for air, water, and wind resistance.

Safe and Secure, with multi-point locking and anti-lift protection.

AB-38 Bifold Doors – Beautiful, Minimal Design

The AB-38 sets a new benchmark for contemporary bifold styling in your home or new extension. The aluminium profiles are designed to be contemporary, with a flat and clean appearance inside and out. The overall look is sleek and crisp, that is perfect for modern décor but also works well in more traditional homes.

And its ultra-slim appearance overall, means there is no better bifold to maximise natural light and create a feeling of space.

Exceptional Thermal and Weather Performance

We’ve fitted the AB-38 bifold in properties nationwide and this door is designed for extreme climates. A combination of thermally insulated frames, high specification glass and exceptional engineering, creates a bifold door that is very well sealed and designed for the worst of the weather.

The U-values of this bifold comfortably meet current Building Regulations, but even better performance glass such as triple glazing can give you U-values and energy savings few bifolds can match. As a result, you’ll enjoy comfortable rooms all year round.

The Slimmest Patio Doors in the UK

At Fenestration Network, we work with the UK’s best manufacturers to give you the same ultra slim patio doors. The AB-38 can be configured to create single or double door and French Doors with side panels. Such is the versatility of the system, that these doors are slimmer than regular residential

entrance doors and are capable of larger sizes too.

Where other doors require side or top panels, AB-38 doors comfortably go up to 1300mm wide, or even 1500mm wide, deepening on the height. This does away with additional sightlines and gives you bigger glass and less visible aluminium. Even better, matching single and double doors are fantastic for larger homes, complementing the bifolds with identical sightlines, hinges, hardware and aluminium profiles.

The benefit in your home is a consistent, elegant look for side doors, dining room or study doors. We can even create bedroom doors opening inwards behind a Juliet Balcony.

There’s nothing else on the market that combines such slim profiles with the ability to go as wide or as tall. Whether as part of a full glazing package or a standalone feature, the AB-38 range creates a cohesive, design-led finish across your entire property.

Doors by Fenestration Network. Built to Last, Designed for Living

The overall design and construction of AB-38 bifold doors promises long-term reliability with doors designed for family living. Premium grade aluminium, Qualicoat Assured powder coated finishes, outstanding glass quality and the finest bifold hardware on the market. All these components, alongside our precision installation means your new bifold doors will perform reliably year after year with peace of mind performance and aesthetic appeal.

AB-38 bifold doors come in a choice of single or dual colours, metallic finishes and the entire RAL colour range. You can also enhance your doors with higher security laminated glass, keep cooler with solar control glass or integral blinds and quieter with acoustic glass.

Why Fenestration Network Recommends the AB-38

At Fenestration Network, we hand-select every product in our door collection, working only with the UK’s most trusted and experienced manufacturers. The AB-38 is crafted with meticulous attention to detail by aluminium experts who specialise in high-performance windows and doors we stand by and know will give you many years enjoyment and peace of mind.

AB-38 Bifold doors promise you latest generation door design, reliable weather protection, peace of mind security and years of trouble-free operation. Proven internationally we think these are arguably the best bifold doors on the market today. And every we supply comes with precise technical records, meaning that if you ever need service or replacement parts in future, we can access the exact glass sizes, colours, and components for a perfect match.

The Fenestration Network White Glove Service

Choosing new bifold doors is a major investment in your home. Our White Glove Service ensures the entire process is handled with care — from design advice and technical survey to installation and aftercare.

You benefit from national expertise combined with local support, full Building Regulations compliance, and a personal service from start to finish.

Contact us today and let us help you transform your home with the UK’s slimmest bifold doors, professionally installed nationwide.