The aluminium bifold door is now a very mature product and there are over forty brands on the market.
Cortizo Bifold that we offer as the GB49 bifold door
(sold through Fenestration Network) combines elegant styling with advanced engineering, giving you a folding sliding system that looks stunning, performs reliably, and lasts for years.
Why Choose Cortizo GB49 Bifold Doors?
The GB49 is a premium aluminium bifold door designed for modern living. With slim 110mm sightlines, excellent energy efficiency, and smooth operation, it’s a proven choice for both replacements and new extensions.
Key benefits include:
Slim 110mm sightlines
– more glass, less frame, for brighter interiors.
Oversized panels
– up to 1200mm wide and 3000mm tall, perfect for dramatic openings.
Thermal performance
– U-values as low as 0.8 W/m²K with triple glazing.
Flexible configurations
– up to 14 sashes, opening in or out, with fixed or open corner options.
Smooth sliding and folding
– high-spec double-bearing rollers with built-in stabilisers for quiet, effortless movement.
Low threshold option
– flush or rebated tracks for seamless integration with your flooring and outside paving.
Security tested
– meeting PAS 24 standards for peace of mind.
Your new GB49 bifold doors are available with fixed or open corner designs. You can also configure them with a low or recessed track, allowing your internal flooring and exterior slabs or decking to run uninterrupted. It is also ideal for wheelchair users looking for accessibility without the stepover or standard tracks.
Even better, GB49 comes with matching single and double doors. The benefit is for other rooms in your home that need external doors. Made from the same profiles, you can have single or double doors for your utility room, garage, dining room or even an upstairs bedroom, opening in behind a Juliet Balcony. Everything matches, from the frame sightlines to the hardware and the glass sizes.
Colour options are extensive, from popular greys and blacks to textured powder coatings and anodised finishes for bespoke projects. And we can enhance your doors with glass upgrades such as acoustic, laminated or solar control glazing.
Contemporary Styling That Suits Every Home
With its clean, contemporary design and consistent proportions, the GB49 looks at home in both modern and traditional properties. Panels fold neatly to one side, opening up the entire width of your space, while a convenient traffic door allows easy access without folding all panels back.
Stylish hardware completes the look, with modern handles in black, grey, white or custom colours to match your frame. Colour options extend to over 150 RAL finishes, dual-colour combinations, textured powder coats, anodised effects and even woodgrain finishes for a more classic appearance.
Reliable Performance and Everyday Practicality
The GB49 isn’t just about appearance — it’s engineered for everyday use:
· Smooth folding action, even at large sizes.
· Durable seals and advanced weather protection.
· Glazing options from 25mm to 48mm, accommodating both double and triple glazed units.
· Strong aluminium construction, designed to withstand heavy use.
It’s a door that feels as good to operate as it looks in your home.
Why We Recommend the GB49
At Fenestration Network, we choose only systems that combine great design with dependable long-term performance. The GB49 bifold is manufactured in the UK by one of the most highly regarded aluminium specialists, with enhanced hardware and over-engineered components to ensure a lifetime of reliability.
Even better, our manufacturer retains full records of every door we supply — including drawings, colours, glass sizes, and hardware details. This means that if you ever need service, replacement parts, or adjustments even years down the line, we can provide fast, accurate support. That’s peace of mind other suppliers often can’t match.
The Fenestration Network White Glove Service
Choosing a bifold door is a major decision for your home, and we’re here to make it simple and reassuring. Our
White Glove Service
means every stage is taken care of — from helping you design your new bifolds, to survey, professional installation, and ongoing aftercare.
With Fenestration Network, you get national expertise with a local touch, ensuring your doors are fitted to the highest standard, fully compliant, and supported long after installation.
If you’re considering bifold doors, get in touch with Fenestration Network today to find out more about the GB49 and experience our White Glove Service for yourself.
