Commercial.

A true aluminium bi-folding door, Alumina offers superb strength with size and high security, with double or triple glazed panes spanning up to 1.2m wide and 2.5m high – with U-values as low
as 1.2 W/m²K.


Not just for family homes, Alumina by Liniar bi-folds are ideal to bring a whole new dimension to a commercial or business property.

Floor space can be maximised at a pavement café by opening up an entire wall in the summer months, safe in the knowledge that thermally efficient Alumina bi-fold doors will also keep in the heat during the winter.

Or give your showroom a new lease of life by installing Alumina for ease of access together with the highest possible security.

Commercial and heavy-duty applications require greater strength, with wider and taller panes of glass and bigger spans – and aluminium is perfectly placed to meet these requirements.

Alumina by Liniar is a true aluminium door, manufactured with standard aluminium machinery. It achieved PAS 24 advanced security accreditation at the first attempt, and holds Secured by Design status, even with panes spanning up to 1.2 metres wide and 2.5 metres high.


One piece lock

An innovative, patented combined lock and thermal insert gives Alumina its high energy efficiency combined with a beautiful, sleek appearance.

Fully accredited

The Alumina bi-fold has been tested to PAS24 security standards and has achieved Secured by Design accreditation for customers’ peace of mind.

‘Warm touch’

Aluminium is often cold to the touch – but Alumina is available with a wide range of foiled finishes for a ‘warm touch’ exterior and a stunning finish.

Thermally efficient

Alumina bi-folding doors offer market-leading thermal performance for tomorrow’s legislation – resulting in superb U-values as low as 1.2.