GB49 Bifold Door
GB49 Bifold Door
The GB49 Bifold Door is a refined, high-performance system built for large openings, elegant sightlines, and exceptional usability in premium homes and commercial spaces and expertly-crafted by Glideline
110mm mullion sightline
Excellent Thermal Performance
Contemporary Styling
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mm x mm
1. Width: Measure horizontally across the opening from edge to edge at the top, middle, and bottom. Use the smallest measurement.
2. Height: Measure vertically from top to bottom on the left, center, and right sides. Use the smallest measurement.
2 pane
1. Width: Measure horizontally across the opening from edge to edge at the top, middle, and bottom. Use the smallest measurement.
2. Height: Measure vertically from top to bottom on the left, center, and right sides. Use the smallest measurement.
Black
1. Width: Measure horizontally across the opening from edge to edge at the top, middle, and bottom. Use the smallest measurement.
2. Height: Measure vertically from top to bottom on the left, center, and right sides. Use the smallest measurement.
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Overview
Slim 110mm sightlines
Maximise light and views with slim central profiles that deliver a clean, contemporary appearance, more glass and less frame.
Impressive thermal Performance
Triple glazed, GB49 Bifold doors go as low as 0.8Wm2K U-Values and double glazed down to 1.4 of less
Smooth, Balanced Operation
High-specification double bearing rollers with built-in stabilisers deliver one of the best movements, with a smooth and near-silent operation, even at the widest or tallest panel sizes.
Versatile Opening
Smooth, Balanced Operation
Durable and Secure
Tested to the latest security standards and with built-in security features, GB49 bifold doors provide peace of mind and proven technical performance.
Low Threshold Option
We can custom-design your new bifold doors with standard or flush tracks creating a seamless transition to outside spaces.
GB49 Bifold Doors - Slim, Elegand and Engineered to Perform
The GB49 is our triied and tested bifold solution for all types of projects, with reliability and dependability built in. Slim frames, durable bifold hardware, premium locks and easy to use. With options for oversized door panels up to 1200mm wide and 3000mm tall, the GB49 delivers stunning architectural impact while maintaining smooth operation and thermal efficiency. Its balanced aesthetics and high-level engineering make it ideal for opening up homes, extensions, or even commercial spaces to the outdoors.
Advanced weather seals, 28mm to 48mm double or triple glazing, latest generation thermal performace and great design, promise a cutting-edge bifold, designed for everyday use.
Built on Expertise: Trusted by Homeowners and the Trade.
At Glideline, we’ve built a reputation for delivering technically advanced aluminium doors and windows tailored to meet standard installations or ambitious residential and commercial projects. Every GB49 Bifold Door is precision-made in our Great Yarmouth factory and delivered nationwide. We know what today's quality-focused homeowners, architects, and installers expect from a premium bifold door, at attractive prices and first class service
"With our previous extensive installation experience, Glideline is partners with a nationwide installation network trusting us for our quality, reliability, and reliable service.
Service and Support You Can Rely On
When you partner with Glideline, you’re not just getting a product—you’re gaining a team that understands the importance of project delivery, communication, and performance. From helping you choose the right configuration to supporting your project completion, we make sure the process is smooth from start to finish.
Benefit from our short lead times, technical guidance, and responsive service, whether you’re a homeowner planning a transformation or a professional overseeing a high-spec development.
Options
Handle Colour Options
Technical specifications
Configurations
Up To 14 Sashes 90º Corner Sash without mullion
Sightlines
49MM Sash, 110MM Sightline
Glazing
Max. 48 MM, Min. 25 MM
Maximum Sash Weight
120KG
Colour Finishes
Available from Glideline
Powder Coating RAL Finish
Standard 7016M and 9005M, 9010G
Available in 150+ RAL finishes
Textured finish available
Split color for interior/exterior
Anodized aluminium
Class 15; 15-19 micrometer coating for external use as standard
Class 20; 20-24 micrometer coating for use in aggressive conditions, industrial areas and marine pollution
Class 20; 20-24 micrometer coating for use in aggressive conditions, industrial Silver brushed, silver rough brushed, bright silver, matte silver, brushed steel, rough brushed steel, brushed champagne re-polished, bright gold, rough brushed inox re-polished, brushed stainless steel, rough brushed ivory re-polished, brushed bronze, rough brushed bronze and re-polished, rough brushed copper re-polished, rough brushed Bordeaux re-polished, rough brushed green, rough brushed blue re-polished, rough brushed grey re-polished, matte black and marine pollution
Wood effect powder coating
Available in pine, oak, cherry wood, sapele, African walnut, walnut, chestnut and white wood
Reviews
Thank you to the installers Joe and Luke for their hard work. It wasn't easy going up all the stairs but they were happy doing so and I couldn't be happier with the doors. Also Henry has been fantastic from sta…
Glideline installed 6 sets of sliding doors in our house. This was a major investment for us so we wanted it to be just right. David and all the team were friendly and helpful from start to finish. Henry was…
FAQs
What’s the maximum glazing thickness?
With our aluminium bifold doors, you can have a glazing thickness of as much as 45mm. This will help to provide the best levels of thermal efficiency and security for your customer’s home.
Will they suit traditional homes?
Aluminium bifold doors are truly versatile in application. They’ll look perfect in modern properties, but also traditional homes, with wood finishes giving them a more heritage aesthetic.
How weatherproof are they?
Through rigorous testing, we have ensured that our concertina doors are fully weather protected. They’ve been tested against air permeability, water tightness and wind resistance.
If we haven’t answered your question, Send us a message