Alumina Doors

Sleek, stylish and cutting-edge, Alumina bi-fold doors are a contemporary home improvement option. Alumina is a fully aluminium system featuring bi-folding, residential and French doors spanning up to 2.5m high.

Explore our Alumina Doors

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Choose your colour

Powder Coat


  • Sculptured
  • Chamfered

New – Grey RAL external, White RAL internal


Please note that other colours are available with longer lead times.

To see the full range of the colours we offer, visit Liniar’s colour page.

All colours are representative only- please refer to a Liniar swatch booklet for accurate colours and finishes. Not all Liniar products are available on all substrates – please refer to the Liniar swatch booklet. Colours and substrates subject to change. RAL numbers are quoted to be the nearest match.

Order an Alumina Door

Why choose Liniar?

Thermally Efficient

Our Alumina profile has been designed to offer A+ standards of thermal efficiency. This means that they work to retain the heat within your home, allowing you to keep warm and comfortable during the winter months.

Other door styles

Not sure bi-fold doors are the ones for you? Not to worry, have a look at the other styles Liniar offers.

Alumina Bi-fold Doors

The Liniar design team is constantly pushing the boundaries of product innovation, finding clever solutions to challenges that others have failed to address.

Continued investment in infrastructure, technology, machinery and a great team of people has helped Liniar to become one of the market leading uPVC window systems with a customer base of specialist fabricators all over the UK.

Liniar’s latest innovation, Alumina by Liniar, is a true aluminium bi-folding door system, beautifully sculptured and foiled to match perfectly with the full Liniar uPVC product suite.

Designed by experts

Alumina is more than just a bi-fold system. It can also be made into flush single aluminium doors or aluminium French doors as a perfect match to the Liniar uPVC Flush Sash window system. Designed by the same experts as innovative Liniar uPVC products, Alumina has a host of unique features and benefits.

Energy efficiency

Aluminium doors are not usually renowned for their high thermal efficiency, but Alumina has been designed with this in mind and can achieve U-values as low as 1.2 W/m²K. This is in part thanks to Alumina’s clever polyamide thermal locking system, providing a thermal break and preventing the transfer of heat outside the building.


As you’d expect from Liniar, the Alumina range achieves the highest levels of security. Its built-in  hardware includes multiple bi-directional locking points, shootbolts, anti-lift features and anti-bump cylinders – ensuring all Alumina aluminium doors hold Secured by Design status.

Find out about the range of thresholds available.

Alumina Bi-fold Doors

Beautiful finish

Unlike most other aluminium doors, Alumina can be foiled with flat or woodgrain finishes. This means not only do the foils provide a ‘warm touch’ to the doors, they can match perfectly with foiled Liniar uPVC windows! Not only does this make for a seamless, attractive appearance, it means all the products in the installation are covered by a single point of guarantee (when fitted to Liniar’s guidelines).

True strength with size

If your door installation requires large expanses of glass, Alumina is ideal. Sashes spanning as high as 2.5m and as wide as 1.2m are possible and the product has been fully tested and passed at its maximum size, giving consumers peace of mind for durability and robustness.

See our video showing the correct way to open and close an Alumina bi-fold door here.

Visit our sub-site on aluminium bi-fold doors for more information about the Alumina range from Liniar or find out about our configurations.

Get a quote for Alumina doors here

QNX Passive House Secured By Design Corgi Fenestration BSI12608 PAS24 Security ISO 14001 ISO 9001 bhhpa Bali NCC Queens Awards Sustainable Midlands Supporter

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