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Citi Homes Windows

Origin doors

Bi-fold doors

High-performance aluminium bi-fold door systems designed to maximise natural light, create wide openings, and provide secure, thermally efficient connections between indoor and outdoor spaces.

Origin bi-fold doors are bespoke aluminium systems engineered to open up large apertures by folding and stacking panels neatly to one or both sides. They combine slim sightlines, thermally broken frames, multi-point locking and a wide range of configuration choices, allowing them to suit both contemporary and more traditional residential projects. The range includes multiple system depths and styles, including a steel-look Soho design, so the visual character can be matched more closely to the architecture of the property.

  • Operation: folding panel system with bespoke opening configurations; doors can be specified to open inward or outward depending on project requirements.
  • Material: premium grade thermally broken aluminium.
  • Security: multi-point locking and security-focused design, with selected systems tested to PAS 24:2022.
  • Thermal performance: system-dependent U-values, with the range including options as low as 0.78 W/m²K.
  • Manufacture: bespoke, made-to-measure systems designed and manufactured by Origin in the UK.

OB36+ Bi-fold door system

Contemporary bi-fold door system with 36 mm sightlines, developed to maximise glass area and deliver the best thermal performance in the range.

OB36+ Soho Bi-fold door system

Steel-look bi-fold door system based on the 36 mm platform, combining slim profiles with more industrial-style visual detailing.

OB49 Bi-fold door system

Slimline bi-fold door system with 49 mm sightlines, balancing a reduced frame profile with strong thermal and security performance.

OB72 Bi-fold door system

Bi-fold door system with 72 mm sightlines, offering a more established and traditional Origin bi-fold appearance.

SystemSightlineU-ValueGuarantee
OB36+36 mmUp to 0.78 W/m²KStandard: up to 20 years; Marine Environment: up to 10 years on the frame and up to 5 years on the hardware
OB4949 mmUp to 1.1 W/m²KStandard: up to 20 years; Marine Environment: up to 10 years on the frame and up to 5 years on the hardware
OB7272 mmUp to 1.1 W/m²KStandard: up to 20 years; Marine Environment: up to 10 years on the frame and up to 5 years on the hardware
  • Corner Bi-fold door
  • Glazing bar door
  • Up to 8 door configuration

Examples of Aluminium Bi-Fold Doors

Sliding doors

High-performance aluminium sliding door systems designed to create large glazed openings with smooth operation, slim frames and secure, thermally efficient performance.

Origin sliding doors are bespoke aluminium patio systems that use large glazed panels moving along concealed tracks to connect indoor and outdoor spaces. The range offers three sightline options so you can choose between a very slim contemporary look or a more traditional frame depth, while keeping the same focus on thermal efficiency, security and refined, flush-stacking operation. Doors can be configured left-, right- or centre-opening, with options for recessed tracks to create a level threshold and a seamless transition.

  • Operation: glazed panels slide along double or triple tracks; opening position can be set to left, right or centre depending on configuration.
  • Material: thermally broken, high‑grade aluminium.
  • Security: ultra-secure multi‑point locking; OS29+ and OS77 carry PAS 24 certification.
  • Thermal performance: system‑dependent U‑values, with the range including U‑values as low as 0.78 W/m²K on the OS29+.
  • Panel sizes: individual panels up to approximately 2.2 m wide and 2.52 m tall (around 6 m² overall) to create near “wall of glass” openings.

OS29+ Sliding door system

The slimmest system at 29 mm sightlines, designed to maximise glass area, natural light and thermal performance with a refined contemporary appearance.

 

OS44 Sliding door system

A mid‑range 44 mm sightline system offering a balanced look between slim aesthetics and a more substantial frame.

 

OS77 Sliding door system

A 77 mm sightline system delivers a more traditional sliding‑door frame profile while retaining modern performance and security features.

SystemSightlineU‑ValuePAS 24Guarantee
OS29+29 mmUp to 0.78 W/m²K origin-global+1Yes origin-global+1Up to 20 years
OS4444 mmUp to 1.3 W/m²KListed as PAS 24 in the web comparison table, but the detailed specification guide highlights PAS 24 on OS29 and OS77; keep this only if it matches your approved Origin source. origin-global+1Up to 20 years
OS7777 mmUp to 1.3 W/m²KYes origin-global+2Up to 20 years

Examples of aluminium sliding doors

French doors/ single doors

Bespoke aluminium French doors designed to combine a classic hinged opening with slim sightlines, strong thermal performance and secure modern construction.

Origin French doors are made-to-measure aluminium door systems designed to create an elegant transition between inside and outside, whether opening onto a garden, terrace or courtyard. They are available in different style families, including the Contemporary and Soho collections, allowing the look to be tailored from clean and modern to more industrial and steel-inspired while maintaining the same focus on precision engineering, security and durability. Each door is manufactured in the UK and can be customised in size, configuration, colour, hardware and finish so the final result feels consistent with the surrounding architecture and the wider Origin range.

  • Door type: external hinged single and French door systems.
  • Material: premium-grade thermally broken aluminium.
  • Thermal performance: U-values as low as 0.78 W/m²K, depending on system and specification.
  • Security: advanced multi-point locking systems and robust aluminium profiles.
  • Manufacture: designed and manufactured in-house in the UK.
  • Guarantee: up to 20 years, depending on the environment and specification.

OF36 Contemporary Door (Single / French)

Hinged single and French doors from the Contemporary External Door collection, using the same 36 mm ultra-slim aluminium profile as the OB36+ contemporary bi-fold system for a consistent modern appearance across hinged and bi-fold openings.

 

OF36 Soho Door (Single / French)

Hinged single and French doors from the Soho External Door collection, styled as steel-look heritage doors on the same 36 mm platform, with integral glazing divides and Soho-specific detailing to match the wider Soho range.

Examples of aluminium French doors/ single doors

More about Origin doors

All Origin doors are manufactured from premium-grade aluminium, chosen for its combination of strength, rigidity and low weight. The profiles are precision‑engineered and, on external doors, thermally broken to improve energy performance and reduce heat transfer between inside and outside. Every frame is finished with a high‑grade, in‑house powder coating to provide a durable, smooth surface that resists warping, flexing and weathering over time.

Origin doors are designed to work with high‑performance double or triple glazing, specified to suit the project and door type. Units typically incorporate low‑emissivity coatings to enhance thermal efficiency and can be selected in clear, laminated, toughened, reflective or privacy finishes (such as frosted or reeded glass) depending on security, acoustic and privacy requirements. External systems accommodate the appropriate unit thickness for their design (for example, bonded units on certain sliders and standard insulated units on others), with the chosen Origin Partner advising on the exact specification.

All Origin door systems are backed by an up to 20‑year guarantee on parts, reflecting the company’s control over design, manufacture and quality testing. The exact warranty terms depend on the product type and installation environment, with shorter durations applying in more aggressive locations such as marine settings (typically reduced periods for frames and hardware). Full details are set out in Origin’s official warranty and terms‑and‑conditions documents, but the overarching framework is consistent: long‑term coverage for materials and manufacture, subject to correct installation and maintenance.

With Origin, the only limit is your imagination

At Origin, we want you to be proud when you see your doors installed. That’s why we give you total flexibility.
All of our products are bespoke and custom to you – so no matter what size your aperture or what look you’re going for, just tell us exactly what you need and we’ll make it for you.

Panel style

Threshold options

Accessory finishes

Handle model

Single or dual color

Configuration

Overall size

Open in or out

Letterbox, knocker and spyhole

Premium grade aluminum

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