Origin OB-49 Bi-Fold Doors
Ultra-Slim 49mm Sightlines With Effortless, Secure Performance
Sleek 49mm Sightlines. Serious Security.
The Origin OB-49 Bi-Fold Door features our slimmest 49 mm sightline to maximise glass and natural light. Panels fold away to create wide, open access, with an optional everyday traffic door for quick in-and-out use. Precision-engineered in the UK, OB-49 pairs free-glide running gear with thermally broken aluminium and advanced weather seals for smooth, quiet operation year-round. Security is standard with an 8-point lock and 3-Star Diamond cylinder, with PAS 24/Secured by Design available. U-values from 1.1 W/m²K with triple glazing (actual performance depends on glazing and configuration).
*For the OB-49, U-values as low as 1.1 W/m²K are achievable with triple glazing and specific configurations. Actual performance will vary with glazing choice, panel size/count, threshold detail, and installation. Please speak to us for a specification tailored to your project.
British Engineering Excellence
Designed and manufactured in the UK by Origin, ensuring exceptional quality and supporting British craftsmanship.
Premium-Grade
Aluminium
High-grade, thermally broken aluminium with a durable powder-coated finish for long-lasting weather resistance and low maintenance—just routine cleaning with mild soapy water.
Advanced Thermal Performance
U-values as low as 1.1 W/m²K with triple glazing. Polyamide thermal breaks and comprehensive weather seals help keep homes warm in winter and cool in summer. Actual results depend on glazing and configuration.
Free-Glide
Hardware
Bottom-rolling carriages with precision bearings and a guided top track deliver a quiet, effortless fold-and-slide action day after day.
Ultra-Secure
Locking
8-point locking with a 3-Star Diamond security cylinder fitted as standard. PAS 24 and Secured by Design options available for enhanced protection.
High-Performance
Glass
Toughened safety glass as standard with options for laminated and acoustic glazing, low-e coatings, warm-edge spacers, argon fill, and triple-glazed units. Integral blinds available.
Completely
Bespoke
Every OB-49 is made to measure: choose from 150+ RAL colours (dual-colour available), multiple handle styles, weathered or non-weathered thresholds, traffic-door options, and 1–12 leaf configurations—including corners.
OB-49 Configuration Options
Choose anything from a matching single hinged door to 1–12-leaf bi-fold sets. Panels can open in or out, stack to the left, right or split, and many layouts include an everyday traffic door. Two–three leaf sets suit smaller openings, while four–six leaf sets can create centre-opening (bi-parting) designs; longer runs are available on request. Download the PDF Configuration Brochure to see all configurations.
Two-Leaf Configuration
Ideal for smaller openings. Choose a 2+0 bi-fold where both leaves fold and stack to the same side (the lead leaf works as an everyday traffic door), or a French (1+1) pair for traditional hinged operation. Opens in or out, stacks left or right, with weathered or low/flush thresholds to suit your project.
Three-Leaf Configuration
Flexible layouts for everyday use. Choose 3+0 (all three leaves fold and stack to one side) or 2+1 (two leaves stack together with a separate traffic door). Opens in or out, stacks left or right, with weathered or low/flush thresholds available.
Four-Leaf Configuration
Great for wider openings and centre-opening designs. Popular 3+1 layout gives a traffic door with no central mullion; 4+0 stacks all leaves to one side; or create a French-style 1+1 with fixed side panels. Opens in or out with threshold options to suit the setting.
Five-Leaf Configuration
For large spans with asymmetric stacks. Options include 5+0 (all leaves one way), 4+1 (four stack together plus a traffic door), or 3+2 split stack. Opens in or out, stacks left/right/split, with weathered or low/flush thresholds.
OB-49 Bi-Fold Door Specifications
Spec | OB-49 |
|---|---|
Construction | Premium-grade, thermally broken aluminium |
Manufacture Origin | United Kingdom |
Insulation | U-Value as low as 1.1 W/m²K with triple glazing |
Glazing | Double or triple glazing; sealed unit options 24 / 28 / 32 mm |
Triple Glazing | Available |
Trickle Vents | Optional, integrated through the top track |
Frame Finish | Over 150 RAL colours, dual-colour option; popular colours on fast lead times |
Handle Finish | Stainless-steel handle range as standard; slave & D-handles also available |
Leaf Width (max.) | Up to 1,200 mm per leaf (down to 325 mm minimum) |
Leaf Height (max.) | Up to 2,876 mm per leaf |
Sightline | 49 mm slimline profile |
Panel Configurations | 2 to 12 leaves; split stacks and centre-opening options available |
Operation Type | Bottom-rolling Free-Glide folding system with precision carriages & guided top track |
Security | 8-point locking; 3-Star Diamond cylinder standard on OB-49; PAS 24 & Secured by Design achievable |
Threshold Options | Threshold Options
Weathered, non-weathered and mobility thresholds (mobility on French/single doors) |
Warranty | Up to 10-year guarantee |
* Performance depends on glazing, sizes, configuration and installation. For project-specific guidance, we’ll tailor the specification.
Colour Options
Hipca White 9910G
Jet Black 9005M
Dark Silver 9007M
Anthracite Grey 7016M
Black Grey 7021M
Slate Grey 7015M
Handle Options & Hardware
Choose from premium hardware designed to complement the ultra-slim OB-49 bi-fold system.
Stainless Lever Handle (Traffic Door)
Ergonomic stainless-steel lever on the everyday access door with integrated multi-point locking and a 3-Star security cylinder. Multiple styles available and colour-coordinated options.
D-Handle (Folding Leaves)
Robust pull handle fitted to the folding leaves for easy opening and neat stacking. Available in stainless steel or RAL colour-matched finishes.
Slave Handle & Shoot Bolts
Low-profile slave handle operates the concealed top and bottom shoot bolts on intermediate leaves—quick to use and securely locks the set.
Free-Glide Running Gear
Bottom-rolling carriages with precision bearings and a guided top track deliver a smooth, quiet fold-and-slide action, built for long-term reliability.
Key Features & Benefits
The Origin OB-49 pairs ultra-slim 49 mm sightlines with a smooth free-glide folding action. Precision-engineered in the UK, it maximises natural light, opens up spaces with minimal frame, and delivers everyday reliability and security.
Ultra-Slim 49mm Mullion
Our slimmest bi-fold sightline increases glass area for brighter, more open interiors while keeping a refined, contemporary look.
Free-Glide Operation
Bottom-rolling carriages with precision bearings and a guided top track provide a quiet, effortless fold-and-slide—day after day.
Advanced Thermal Efficiency
Thermally broken aluminium, comprehensive weather seals and high-performance glazing help keep heat in during winter and out in summer. U-values from 1.1 W/m²K with triple glazing.
Durable Powder-Coated Finish
High-grade powder coating creates a tough, smooth surface that resists weathering and colour fade. Choose from 150+ RAL colours, with popular finishes on fast lead times.
High-Security Locking
Unique 8-point locking with a 3-Star Diamond security cylinder fitted as standard, plus internal glazing beads. PAS 24/Secured by Design available.
British Manufacturing
Designed, engineered, manufactured and supported in the UK for consistent quality and dependable lead times.
Why Choose Origin OB-49 Over Other Systems?
The OB-49 combines ultra-slim 49mm sightlines with a smooth free-glide folding action—offering real advantages over sliding, French, and traditional patio doors.
Wider Openings Than Sliding Doors
OB-49 panels fold and stack to the side, creating a much larger clear opening than sliders of the same overall width—perfect for true indoor–outdoor living.
Everyday Access With a Traffic Door
Many layouts include a hinged traffic door for quick in-and-out use without folding the whole set—ideal for daily life and colder days.
Engineered Aluminium Advantage
Slim, strong aluminium profiles with polyamide thermal breaks for energy efficiency and low maintenance. Security is serious too: 8-point locking with a 3-Star Diamond cylinder as standard; PAS 24 available.
More Versatile Than French Doors
Span wider openings with multiple panels, choose centre-opening (bi-parting) designs, and pick thresholds to suit the setting—all while keeping the refined 49 mm look.
Introducing the all-new OS-29+
Experience the next generation of slimline design with the OS-29+.
Featuring enhanced thermal efficiency, flush stacking and refined aesthetics, the OS-29+ delivers in both style and performance for the long-term.
Speak to us about this range!
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