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Perfect for fabricators

A ‘true’ aluminium bi-folding door, Alumina was designed to be manufactured using standard machinery
– or even just corner crimpers – making it easy to fabricate.

Enabling fabricators to offer a full product range, Alumina by Liniar is an aluminium bi-folding door system that, uniquely, is fully sculptured and foiled to perfectly match the Liniar PVCu window system.

A pure aluminium bi-fold, Alumina delivers the thermal benefits usually associated with a hybrid system, with U-values as low as 1.2.

Much easier to fabricate than a hybrid bi-fold, no specialist machinery is needed with Alumina – just corner crimpers or standard aluminium machinery.

With an established supply chain, Alumina is delivered within Liniar’s standard lead times, delivery channels and expertise – making ordering simple.


Low thresholds

Liniar’s optional aluminium low threshold is just 23.5mm high at its highest point, requiring no trench excavation to install. Add a low threshold tray to make it Part M compliant.

High security

Alumina ensures the highest security with multiple bi-directional locking points, shootbolts that secure firmly into the track, built-in anti-lift features and anti-bump cylinders.

Superior U-values

With 28mm double glazed and 36mm or 40mm triple glazed units available, Alumina offers ‘true’ U-values as low as 1.0W/m²K, thanks to its innovative thermal lock.

‘Warm touch’

Alumina bi-folds can be foiled with any woodgrain or coloured finish – for a beautiful colour match to uPVC windows and doors.