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Origin OS-44 Slimline Sliding Door

The bespoke patio door with a slimline mullion

The contemporary Origin OS-44 Slimline Sliding Door is the thinner version of the OS77 patio door from Origin.   You benefit from a reduced sightline at the mullion giving increased glass sizes and great views out to your garden. The ideal high-specification aluminium patio door for your property renovation project or new extension. And if you want even thinner, there’s a 29mm version also by Origin.

  • Natural light from bigger glass panels
  • High end Origin product quality
  • From 1.8m to 6.6m wide
  • 2 or 3 panel designs

Design and Performance

Modern lines with elegance

The design of the Origin OS-44 slimline sliding door is carefully thought out to provide a modern-looking door, but also with similarity to classically styled doors. Expert craftsmanship, exemplary quality seamlessly improving any type of home.

Cortizo sliding doors 4700 model in a white colour, new kitchen

Rigorous attention to detail

Attractive profiles all round and 44mm mullions ensure you get more glass and light and a sleek discreet sliding door in your home.  Designed to replace your old patio doors or for your new extension. An Origin OS-44 slimline sliding door delivera excellent thermal performance and exceed Building Regulations. The best quality rollers and components give you a wonderfully smooth slide action. Luxury handles make using the doors a pleasure. Every detail of these stylish and distinctive sliding doors signifies sheer quality. Different glass options give you enhanced security, better solar protection and even better privacy when specified with integral glass blinds.  Best of all, the quality of this door also gives you peace of mind, thanks to a guarantee of up to 20 years.

Made to measure

Total design flexibility

All Origin Doors are fully made to measure, made to your sizes and your design. Choose one panel sliding behind a fixed pane or all panels sliding for even better flexibility.  Achieve the ideal look and improve your home.

Bespoke patio doors

Customisation begins with a choice of over 150 RAL colours. From classic white to sleek black and contemporary greys. Or choose a more distinctive colour to make your doors stand out in your home. Two panel doors provide the perfect solution for smaller apertures with up to a 50% clear opening.  Three panel doors give even more flexibility with a two-thirds opening. There's even a double or triple track option letting you choose how many panels slide. For the handles, the Origin OS-44 slimline sliding door comes with two options, both functional and elegant. The integrated handle offers key and main lock operation within one handle unit. Or there's the option for an architectural bar handle at 500mm, long with separate locking. Both options come in high quality, marine-grade stainless steel. Toughened glass comes as standard and we can help you personalise your doors for enhanced security, sun-protection of furniture or improved acoustics.


Style, Quality and Longevity

Great design, engineering and a feeling of real quality are evident when you look at and move these premium sliding doors.  Door heights up to 2.52m tall make the Origin OS-44 slimline sliding door ideal for all types of installations and use, including inside the home as a room divider and even as a porch door.

Origin OS-44 Slimline Sliding Door in a kitchen extension

Improved security, weather protection and energy efficiency.

Internal glazing beads prevent the removal of the glass from the outside.  High security comes as standard. Every door comes fitted with a multi-point locking system, having six locking points. Four locks engage in the frame and one shootbolt in the head and threshold. The fully concealed rollers and track are the best-engineered types, ensuring an always reliable and light slide action.  The doors even self-level overcoming any operational and reliability issues, even if a newly built opening is not entirely level. Double glazed with soft-coat low-emissivity coating, warm edge spacer bars and argon gas fill insulates your rooms with at least 1.8Wm2K U-Values. And to keep you warm and dry in winter, insulated aluminium combines with sophisticated seals and gaskets around the entire door set.  Enjoy daylight and a spacious feel in winter and connect your home to your garden in the summer.

Update your sliding doors with Origin

Perfect for a door upgrade or your new extension

A flat modern look, gorgeous smooth coloured surfaces, elegant door handles and glass clarity.

All these great features and more transform your room into a new illuminated space.

Origin OS-44 Slimline Sliding Door shown closed with a garden view


At the forefront of aluminium and sliding door technology, they improve your home with the right look and 21st Century technology. The appeal of a sliding door is the wider panels you get over any hinged or folding door. And with the slimline mullion, you get an even neater look in your home. Flexible designs, your choice of left or right sliding and the fast lead times only Origin doors offer, ensure you create your dream home faster too. The unbeatable Origin 20-year guarantee also means your investment is protected and your doors will look beautiful and work faultlessly for many years to come. Enjoy a great price, high-end manufacturing and peace of mind. From the mitred door corners to the flawless paint finish, every detail of these doors is a testament to their outstanding engineering, design and performance. Simply put, Origin is one of the best aluminium brands for your home.

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