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Origin OB-49 Bifold

The Origin OB-49 Slimline Door System’s sightline of just 49mm means less profile and more glass is achieved, giving you a panoramic view of your surroundings. Manufactured from premium grade aluminium, it offers impressive panel sizes without compromising on security, thermal or operational performance - it's the ultimate combination.

Our aluminium casement door styles are a popular choice for homeowners because of their classic, chic appearance and ‘A’ energy rating, ensuring your home retains heat, saves you money, and looks good doing it.


  • Outer Frame Depth 75mm
  • Sash Depth 59mm
  • Individual Sash Sightline 49mm
  • Hingestile Glass to Glass Sightline 110mm
  • Track Height (not including rebate) 50mm
  • Weathered Threshold Height 67mm
  • Non-weathered Threshold Height 50mm
  • Mobility Threshold Height 20mm
  • 3-star diamond cylinder as standard
  • 8-point locking system and includes chamfered 20mm linear
    bolts and deep throw 25mm security hooks
  • Thumb-turn option available
  • HAFI stainless steel handle as standard
  • Each door comes with 2-5 solid zinc security hinges
    depending on height
  • The doors are bottom running and incorporate a unique free
    glide carriage assembly, which uses acetal rollers with sealed SKF
    stainless steal bearings on an 8mm hardened stainless steel axle
    Square bead internally



All lead doors that are greater than 1125mm tall contain the Origin multi-point lock. The Origin multi-point lock offers eight points of locking and is part of the reason the overall door system is PAS 24:2016 certified. Additionally, it achieves the Secured by Design accreditation.


  • Minimum Sash Size Width  (mm) 325
  • Minimum Sash Size Height (mm) 400
  • Maximum Sash Size Width (mm) 1200
  • Maximum Sash Size Height (mm) 2876
  • Minimum Sash Size Width (mm) With multi-point lock 325
  • Minimum Sash Size Height (mm) With multi-point lock 1000
  • Maximum Sash Size Width (mm) With multi-point lock 1200
  • Maximum Sash Size Height (mm) With multi-point lock 2876
  • Minimum Sash Size Width (mm) Even sets going in one direction 700
  • Minimum Sash Size Height (mm) Even sets going in one direction 1000
  • Maximum Sash Size Width (mm) Even sets going in one direction 1200
  • Maximum Sash Size Height (mm) Even sets going in one direction 2876

Relax, Origin has you covered

Our Origin Slimline Aluminium Windows and Doors are covered by a 20-year manufacturer guarantee. As a result, you can relax knowing that your windows and small bifold doors crafted from aluminium in Droitwich will last for years to come. Whether you’re after bifold external or interior doors, Diamond Windows Droitwich’s aluminium products have got you covered.

Alternative Shades

Our collection of Origin OB-49 Doors can come in up to 150 RAL colours and modifiable designs. In order to give it a flawless finish, the highest-grade powder coating is applied to the aluminium; with a durable yet smooth finish, it offers the benefit of being highly resilient to the elements.


The Cost of Origin OB-49 Bifold Doors and Windows

The cost of the products and installation will vary from property to property, but one thing that doesn’t change is the positive impact that these doors and windows have on a home. With an ‘A’ energy rating, you’re sure to save money on your energy bills, and your home’s value will likely increase.

10 Year Guarantee

All of our double-glazed casement windows are easy to maintain and keep looking like new, partly due to their durability and longevity. We’re so confident in our windows that we offer a ten-year guarantee as standard.

Shop OB-49 Doors with Diamond Windows

When searching for double-glazing specialists in the West Midlands, you needn’t look further than Diamond Windows. We’re well-equipped to supply and install aluminium front doors, so please don’t hesitate to get in touch regarding your door needs. Our expert team will be more than happy to advise you about our OB-49 Door range or any other door types.

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Trust our 5-Star Reviews

“Excellent selection, first class advice and outstanding fitting. We wouldn't go anywhere else for double gazing projects.”

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Contact us
Diamond Windows, Unit 22, Northstreet I.E, Droitwich,West Midlands, WR9 8JB
Company Reg: 5367399
Open Hours
Mon to Fri: 9am to 4.30pm
Sat: 9am-1pm
Sun: By appointment