Leaf count
Fewer broad leaves or more narrow leaves are compared for proportion and use.
Origin External Doors
Origin Bi-Fold Doors
Compare the ultra-slim OB36+, versatile OB49 and classic OB72—three bespoke Origin Bi-Fold Door systems, surveyed and installed by PM Windows.
Made to measureSurveyed by PM WindowsInstalled by our team
36/49/72mmOrigin sightlines
Up to 0.78U-value W/m²K*
PAS 24Security standard
Up to 20 yrsOrigin guarantee*
Open the room completely
Three ways to frame the same sense of openness.
Choose the ultra-slim OB36+, balanced OB49 or classic OB72. PM Windows will compare sightlines, panel proportions, thermal performance, threshold and daily access before specifying the right Origin system for your opening.
01
A generous clear opening
Panels fold to one or both sides to connect the room with the garden.
02
Flexible day-to-day access
A traffic door can provide convenient access without folding the complete set.
03
Made around the aperture
Leaf sizes, opening direction, threshold and glazing are selected as one layout.
Simple design explorer
See the main starting points.
Choose a starting arrangement below. PM Windows will confirm the exact configuration, proportions and practical details after survey.
This visual is a guide, not a technical drawing. Every final arrangement is subject to system limits, survey and detailed design.
Price this option →Three-leaf arrangement
A popular route for compact and medium openings.Illustrative layout
A popular route for compact and medium openings.Illustrative layout
Tailored to the project
The decisions we make with you.
The best result comes from resolving the technical and visual details together, then recording them clearly in the quotation.
Stack direction
Fold left, right or split the stack to suit the room and patio.
Traffic door
Create simple everyday access without moving the complete set.
Threshold
Weathered and lower options are selected for exposure and access needs.
Glazing
The glass specification balances comfort, safety, security and light.
Hardware
Handles, hinges and running gear can coordinate or provide a considered contrast.
Colours & finishes
Quietly coordinated or deliberately contrasting.
Availability varies by product. Explore useful RAL starting points, compare finish types and save a shortlist before PM Windows confirms the exact options for your chosen system.
Check finishes →Anthracite Grey
Jet Black
Traffic White
Warm Grey
Bronze Tone
Special Finish
Product specification
The important facts, made easy to compare.
These headline capabilities are a starting point. The exact product, sizes, performance, glass, security, finish and guarantee will be stated in your written quotation.
Origin product, designed and manufactured by Origin; locally specified and installed by PM Windows.
- Origin systems
- OB36+, OB49 and OB72
- Sightline choices
- 36mm, 49mm or 72mm
- Configurations
- Bi-fold, single, French and corner
- Glazing
- Double or triple, system dependent
- Thermal performance
- From 0.78 W/m²K*
- Security
- PAS 24; SBD on selected systems
- Colours
- 150+ RAL choices, system dependent
- Guarantee
- Origin guarantee up to 20 years*
*Maximum sizes, performance and guarantee terms depend on the selected system, dimensions, configuration, glass, location and installation. Final project values are confirmed in writing.
Origin inspiration & PM installations
Picture the product in context.
Official Origin imagery shows the product in detail, while the PM Windows project demonstrates the finish delivered by our installation team.
Frequently asked questions
Useful answers before you choose.
How many panels should a bi-fold have?
That depends on the aperture, preferred leaf proportions and where you want the panels to stack. PM Windows will draw the practical options.
Can I have an everyday access door?
Many configurations allow a traffic door that operates independently from the folding set.
Can bi-folds open inwards?
Several systems offer inward or outward opening. The best choice depends on internal space, external space and drainage.
Ready to take the next step?
Bring us your plans, dimensions or simply an idea.
We will shape the arrangement, explain the options and provide a clear written quotation for supply and installation.