36mm sightline
Origin OB36+
The slimmest, most architectural option, including the distinctive steel-look Soho style.
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.
Choose your Origin system
OB36+, OB49 or OB72.
Each is an Origin Bi-Fold Door, but the frame proportions and character are deliberately different. These matched product photographs make the choice clearer before we discuss configuration.
49mm sightline
Origin OB49
A refined middle ground with slim framing, strong performance and versatile proportions.
72mm sightline
Origin OB72
The classic Origin Bi-Fold Door with a more substantial frame and broad configuration choice.
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 →Two-leaf arrangement
A compact folding pair for smaller openings.Illustrative layout
A compact folding pair for smaller openings.Illustrative layout
Keep the technical detail useful
Compare the look here. Confirm every detail with us.
Origin’s brochure contains the full colour, hardware, threshold and performance information. PM Windows will translate that into one clear quotation for the exact system, opening and finish you choose.
Installed by PM Windows
Origin Bi-Fold Doors in real homes.
These completed projects show the scale, finish and garden connection achieved by our own survey and 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.