Alumina Bi-Fold Doors


Why Choose Liniar Alumina Bi-Fold Doors?

We take pride in listening to the needs of our customers. Feedback makes it clear that there’s a need for aluminium bi-folds for larger and more heavy-duty applications, matching the quality of a uPVC window system.



This got us thinking – what if there was a way to create a true aluminium door with the same sculptured profile as the Liniar window system? What if we could make it the most thermally efficient aluminium bi-fold out there? And what if we could foil the exterior, so it matched perfectly with uPVC windows?


We did consider multi-material clad hybrid doors – however our feedback showed there are inherent problems with this type of bi-fold. Not only do they require specialist machinery and set-up costs, they can be extremely difficult to fabricate. Furthermore, the warmth of the uPVC is hidden away inside the profile so it’s difficult for consumers to see the benefits of such a system. A true aluminium bi-fold was the answer. With these objectives in mind, the Liniar design team embarked on a project to create the first thermally efficient aluminium bi-fold to match a uPVC window system. The results are clear – Alumina by Liniar breaks new ground with superb strength, high security, low U-values, sculptured lines and a ‘warm touch’ exterior. And with it, Liniar becomes the first systems company to offer a full suite of fully matching products for any home or building.



Alumina is more energy efficient than other aluminium bi-fold doors – with U-values as low as 1.2 W/m2K.


Liniar were the first to launch a bespoke uPVC bi-folding door system with associated patented hardware and have more than 500 years of industry experience between them – the same team of experts have designed and developed Alumina by Liniar. The latest development from this ground-breaking company and team, Alumina heralds the arrival of a new breed of bi-folding doors.



Rosewood both sides*
Golden Oak both sides*
Anthracite Grey both sides*
Cream folied both sides*
White folied both sides*
Ebony Black both sides*
Irish Oak both sides*
Smooth Cream through colour*

Bespoke Colour Options

Rosewood on White*
Golden Oak on White*
Anthracite Grey on White*
Cream foiled on White*
Chartwell Green on White*
Ebony Black on White*
Agate Grey
Silver Grey
Basalt Grey
Dark Green
Dark Red
Irish Oak

Colours marked * are from our standard collection in featured profile, all other colours are subject to price and availability on application. Please note: colours are for illustration purposes, for an exact example please ask your sales representative for a Renolit swatch sample. Choose from a wide variety of colour options including: White, Rosewood, Cream, Light Oak, Chartwell Green, Grey and classic Ebony Black. Liniar products are also offered in a wide choice of bespoke colours, please see Renolit foil book, (subject to availability and price on application only). Please note Ebony Black both sides patios and bi-folds are subject to lead time.