»»‘ Alumina by Liniar ’ has been designed and developed by the same team of experts as the Liniar window system – and offers superb thermal performance and a host of other features .

Liniar launched a bespoke PVCu bi-folding door system to the market in 2011 , then broke new ground with its ModLok™ bi-fold in 2014 . The thermally efficient PVCu bi-fold has become a market leader , combining standard PVCu fabrication techniques with an industry first patented exo-skeleton , giving the bi-fold doors the technology and strength for bigger and wider door apertures .

Now , in response to customer demand , Liniar has created a 100 % aluminium bi-fold system designed for heavy duty use , spanning even larger openings and ideal for commercial projects - Alumina by Liniar .

Group CEO Roger Hartshorn explained why a PVCu systems

company took the unusual step in designing a fully aluminium bi-fold system : “ During conversations with customers it became clear that there ’ s a need for aluminium bi-folds for larger and more heavy-duty applications – but there was nothing on the market that exactly matched a window system .

“ This got us thinking – what if there was a way to create a true aluminium door with the same sculptured profile as our window system ? What if we could make it the most thermally efficient aluminium bi-fold ? And what if we could foil the exterior , so it matched perfectly with PVCu windows ? Finally , we wanted our customers to be able to manufacture it using traditional techniques and machinery , so that was an important criteria .”

With these objectives in mind , the Liniar design team led by Chris Armes embarked on the project to create the first thermally efficient aluminium bi-fold

to match a PVCu window system .

Feedback at the FIT Show was ‘ superb ,’ with visitors flocking to be amongst the first to offer Alumina to their customers when it officially launches in July .

Able to span 1.2 metres wide per sash and 2.5 metres high , Alumina by Liniar can be manufactured using standard aluminium machinery by fabricators who are equipped for it .

For customers who aren ’ t in a position to manufacture it themselves , or would prefer to buy it prefabricated , Liniar has set up its own supply chain .

Aluminium doors are considered sleek , strong , smooth and beautiful , yet can often feel cold – but Alumina by Liniar has an optional ‘ warm touch ’ foiled exterior .

It can be offered in just about any powder-coated colour . Consumers can choose a beautiful wood grain or flat foiled finish for their doors – perfectly matching their Liniar PVCu

windows for a more energy efficient home .

Liniar says Alumina is the only fully sculptured ( curved ) aluminium bi-fold door on the market .

It has been designed from scratch with a combined lock and thermal insert . This lock unites the ultimate specification of security with a high strength engineering polymer lock body – so the lock itself acts as a thermal break .

With 28mm double glazed and 36mm or 40mm triple glazed options available , Alumina offers ‘ true ’ U-values as low as 1.2W / m1.2W / m2K .

Alumina ensures the highest security for homeowners with a suite of hardware following the same principles as the Liniar ModLok™ bi-fold system , including multiple

bi-directional locking points , shootbolts that secure firmly into the track , built-in antilift features and anti-bump cylinders .

Alumina obtained PAS 24 accreditation and has been awarded Secured by Design status at the first attempt .

All Alumina bi-folding doors are available with three threshold options . The rebated aluminium frame runs seamlessly around to form a weathertight threshold , and the doors are supplied with this as standard . Liniar ’ s optional aluminium low threshold requires no trench excavation to install , and is just 23.5mm at its highest point . When Liniar ’ s low

threshold tray is added , the whole entrance becomes Part M compliant .

The bi-folds move smoothly and effortlessly along a sleek stainless steel track and are ‘ bottom rolling ’, not top-hung – meaning no extra stresses are placed on the building ’ s lintel .

PVCu beads are offered with Alumina , making the door panes easy to glaze .

Other details include folding keys , ergonomic handles , hidden fixings for hinges and discreet magnets .

For more information go to http :// alumina . liniar . co . uk or email sales @ liniar . co . uk