GB-49 Cortizo Bifold Door

GB49 Cortizo Bifold Door | Premium Aluminium Folding Doors UK | The Fenestration Network

GB49 cortizo Bifold Door | Premium Aluminium Folding Doors UK – national supply, survey and installation

020 341 10038

Rest of UK:

01768 254552

projects@thefenestrationnetwork.co.uk

Discover the GB49 Cortizo Bifold Door system — a high-performance aluminium folding door from the trusted Cortizo profile family, designed for modern living environments where maximum glazing, architectural style and durability matter.

What Is the GB49 Bifold Door?

The GB49 is an advanced aluminium bifold door solution that offers ultra-slim profiles, large panel capacities and flexible configurations to suit both standard and large openings.

Built using Cortizo engineering but optimised by trade specialists, this system delivers premium appearance and performance for homeowners, architects and developers.

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Key Features & Technical Specifications

Slim sightlines:

The central meeting stile measures just 110 mm and the side frame face just 89.5 mm, giving a cleaner, more transparent look.

Large panel capabilities:

Panels can reach widths up to ~1,200 mm and heights up to 3,000 mm in large-format configurations.

Thermal performance:

With the correct triple glazing, U-values can go as low as approximately 0.8 W/m²K.

Glazing range:

Supports glazing units from 25 mm up to 48 mm depth for double or triple-glazed applications.

Security & weathering:

Tested to PAS 24 standards, with Class 4 air permeability, Class E750 water resistance and Class C3 wind load rating in certain configurations.

Configurations:

Available in up to 14 sashes, open-in/open-out, 90° corner options without mullions, and both low-threshold designs for seamless indoor-outdoor transitions.

Finishes & customisation:

Wide choice of RAL colours, dual-colour finishes, anodised effects and premium hardware options.

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Why Choose the GB49 Bifold Door?

Maximised glass, minimal frame

— enhances natural daylight and extends visual connection to outside.

Modern architectural look

— slim profiles give a crisp, contemporary aesthetic suitable for renovations and new builds.

Strong performance credentials

— excellent thermal and security specs make it a smart choice for UK climates and regulations.

Flexible installation options

— handles large formats, open corners and premium finishings easily.

Long-term durability and finish

— aluminium construction requires little maintenance and retains its appearance with premium coatings.

Typical Use Cases

Contemporary home extensions or glazed garden rooms

High-end renovations in urban or rural settings

Large span openings in new builds or remodelled living spaces

Seamless indoor-outdoor transitions where design is important

Projects where matching door and window systems deliver consistency across the property

Supply, Installation & Service – national reach

We provide a complete service:

Site survey & measurement (including structural/threshold specification)

Bespoke manufacture to your exact size, finish and configuration

Professional installation by our accredited installers — ensuring correct alignment, sealing and fixings

Aftercare & warranty support — we back the GB49 with local service and long-term support

CORTIZO GB49 BIFOLD DOORS | FULL PRODUCT REVIEW

Cortizo GB49 Bifold Doors | Fenestration Network

Cortizo GB49 bifold doors – slim 110mm frames, smooth folding action, secure and thermally efficient. Stylish aluminium bifolds for modern UK homes.

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GB-49 Cortizo Bifold Doors — Supplied & Installed Across the UK

We provide full supply and expert installation of the GB-49 Bifold Door system by Cortizo nationwide. Whether you’re working on an extension, a renovation or a new build, our installation teams cover all major UK regions with precision and care.

South & South East

GB-49 Cortizo Bifold Doors London, Kent, Surrey, Sussex, Hampshire, Southampton, Home Counties and Essex.

From sleek urban townhouses in London to coastal homes in Sussex, we deliver the GB-49 system with tailored design advice and full installation.

South West & West

GB-49 Cortizo Bifold Doors Devon, Bristol and Gloucester.

Ideal for large openings in barn-conversions or country homes, our South-West installers bring the GB-49 doors with premium finishes and reliable service.

Midlands & Central

GB-49 Cortizo Bifold Doors Birmingham, The Midlands, Northamptonshire, Nottinghamshire, Leicestershire, Derbyshire and Lincolnshire.

Our central UK network serves residential and commercial clients alike, delivering the GB-49 system efficiently and to high standards.

GB-49 Cortizo Bifold Doors Greater Manchester, Manchester, Lancashire, Liverpool, Cheshire, Cumbria and Carlisle.

Whether it’s a city apartment or a countryside property, we supply and install the GB-49 doors across the North West, focusing on high quality and local knowledge.

Yorkshire & North East

GB-49 Cortizo Bifold Doors Yorkshire, Newcastle and the North East.

From high-end renovations in Yorkshire to new build developments in the North East, our teams install the GB-49 system with full project management and aftercare.

Ready to transform your home with GB-49 bifolding doors? Request a no-obligation, tailored quote today.

Request Your Free GB-49 Quote | The Fenestration network

If you’re looking for the GB-49 Cortizo Bifold Doors supplied and installed in your region, request a free quote today. Our team will guide you through sizing, sightlines, colour choices and hardware options, and schedule a home survey with one of our local experts.

South of England

Why Partner with The Fenestration Network

Working with us gives you

much more than just a door

supply & installation

service across the UK

Local surveyors and installers backed by national coordination

Expert design, specification, and configuration support

Competitive costs without sacrificing quality

Installation warranty + product warranty for peace of mind

Proven experience in residential installations

email us for a quote on your project

WHAT CUSTOMERS NATIONWIDE THINK OF US:

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Aesthetically pleasing and simple to install.

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Fresh, vibrant designs.

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Quick lead times and a dream to install.

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Extensions, Orangeries, Building works around the Glazing.

Integrate Building and Glazing in one for a seamless project.

National Coverage — Wherever You Are in the UK

No matter your postcode — London, Midlands, North West, Yorkshire, Scotland or Wales — our regional installers deliver the same high standards.

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PUTTING YOUR MIND AT EASE…

A British Standard that specifies the security performance requirements for doors and windows

the official police security initiative that works to improve the security of buildings and their immediate surroundings

quality glazing products, manufactured right here in the UK

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Professional experts on hand to guide you through your Glazing project

National Reach – Email us for a quote

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

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The Fenestration Network

Caera Mahoney

19:17 05 Dec 25

We were originally going to order our patio doors supply only and get our builders to fit them, but after reading some of the advice from Nick at doorandwindowexperts we realised it was too big a risk for such an important and expensive purchase. Nick recommended Tom at The Fenestration Network and from the very first contact we felt really looked after; no question/query was too much trouble and we received a truly individual service. We opted for the full survey, supply and fit even through it stretched our budget and I'm glad we did. The communication was great, the lead time was reasonable and the fitters were really lovely. We are very happy with our new doors! 😊

Simon Bates

08:46 02 Dec 25

Fantastic service from start to finish Tom was great to deal with along with the Survey meeting the lads before they started to double check everything. The fitting team turned up on time today with the delivery also was almost finished for 11 o’clock very impressive., Considering the size of the units and the Power needed to do this job was very difficult and had to be thought out and planned correctly they nailed it, the trimming and silicone’s skills were second to none . Will look forward to using this business again for any window door installation , large profile glass installation.Etc

tracy wake

17:44 14 Oct 25

Great company to deal with professional and extremely knowledgeable exactly what we as the supplier and the end user (customer) needs

Allan Barker

18:18 10 Oct 25

Fenestration network have supplied and fitted some top class bi-fold doors in our extension project.
A clear payment plan which is in line with all top window/door suppliers
Good communications throughout the process
The company was found with assistance of an online expert who is keen to advise on reliable, expert supply and fit companies at a reasonable price, not expensive like some other companies I visited.
If you have a building project I would recommend Fenestration Network, make contact and speak with Tom.
They will be able to advise on different types of doors depending on your requirements.
I would highly recommend you contact Febestration Network for stunning, top quality, High end doors.

Matthew Hall

16:25 01 Oct 25

I have really enjoyed working with The Fenestration Network. Every job I have been involved in has been exactly as described, with the team always being friendly and professional. When I have been on site to capture footage of properties with new glass and glazing supplied by them, the installations have looked amazing both in person and on camera.

Customers I have spoken to while on site have also told me how impressed they are with the quality of the products and services provided by The Fenestration Network.

From a drone filming and marketing perspective, the aluminium glazing products, windows, doors, and bi-folds have been fantastic. They come in a wide range of colours, which not only gives each home a unique look that perfectly matches and complements the property, but also makes the promotional videos stand out with variety and style.

The Fenestration Network clearly delivers exactly what their customers want, both in quality and in choice.

Paul Craddock

11:37 19 Sep 25

We had windows and doors supplied and fitted by Tom and his team and apart from their prices being very competitive, the quality, look and service was excellent. To add to this, Tom gave us a discount for allowing him to have a drone take pictures which will happen once all the rendering is finished. I would highly recommend them to anyone. Thank you Tom and the team

Robert Knight

10:21 29 Aug 25

I contacted Tom Evans of The Fenestration Network for my recent, significant, aluminium window supply and install project. I found Tom easy to work with and thorough on endeavouring to get everything right before the project started. There was no pressure to rush things, but he was quick to action anything needed. The installation team he used in my area of the country was polite, hard working and personable. Overall, I valued his high personal integrity displayed thoughout the project.

Stuart Wilson

08:10 15 Aug 25

From the first contact with Tom from the Fenestration Network they were very professional and very responsive.. They had been passed our project idea and I gave approximate sizes for bi-fold doors/windows for our outside terrace…

We wanted to fully enclose it, within 48 hours Tom came back to me with a priced quote which was exceptional…. Full detailed drawings of each view suggesting top openers on one side…. My experience has been first class, I have previously been in the Architectural industry for 12 years manufacturing these type of products and was impressed how this company worked.

I agreed the price and within 1 week Tom had arranged for a site survey to finalise the dimensions…. The installation team that Tom used for the survey and installation were very good and very keen to do a fantastic job, the 2 guys (Matt & Gary) couldn’t do enough for us.

The end product was a great addition you our property giving us a fantastic room which we can use all year round.

I would have no reservations in recommending this company for any projects you are planning in the future…

See attached video of the finished project.

Matthew

15:19 13 Aug 25

Excellent from start to finish very professional company to deal with and great products

Bradley Roberts

12:14 08 Jul 25

We used The Fenestration Network for the replacement and installation of all our windows and patio doors as part of our renovations. We ran into some difficulties during the installation but the team were dedicated to getting us back on track! Would recommend to others looking for window and door installers.

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