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Superfold PVC Bifold



Earning the accolade of a Queen’s Award for Enterprise in Innovation, offering beautiful aesthetics, intelligent functionality and outstanding security, ModLok™ bi-fold doors are sure to be a wonderful addition to any home.

Liniar’s ModLok™ bi-folding doors offer a totally unique option, thanks to the patented exoskeleton design giving them unparalleled strength, security and durability. No other PVCu bi-folding door has been tested to over 127,000 full opening cycles; and with low U-values, PAS:24 and Secured By Design accreditation, the Liniar ModLok™ is in a class of its own – earning the accolade of a Queen’s Award for Enterprise in Innovation

Low maintenance

You can rest assured that you won’t need to spend hours looking after your set of Liniar bi-fold doors to maintain their beauty.

Unlike timber, you won’t need to treat or paint them each year to keep them in top condition – and that’s not all; our 10 year frame guarantee gives you the peace of mind that the colours won’t fade.

All that is needed to keep them looking their best is an occasional quick wash with soapy water.

Family friendly

The Registered Design protected Liniar low-threshold option provides a seamless point of entrance and exit, making it perfect for family homes.

An optional tray to seat the low threshold creates an easy-access ramp for wheelchairs and prams without the need for messy and expensive excavation.

Ultra-low, the Liniar threshold measures just 24mm at its highest point, with silver or gold finish options to perfectly complement the door hardware.


Slim hinges with internal hidden fixings, not only maintain the sleek lines but enhance security as they can’t be unscrewed from outside.

We wanted to offer a low threshold, without the need for expensive and messy excavation, so we designed our own clever solution.

We’ve even designed folding keys, to avoid any problems with keys being left in the locks during operation – it’s often the small things that make a huge difference.

Open up your business

Not just for the family home, Liniar bi-fold doors can bring a whole new dimension to your commercial or business property.

Maximise floor space at your pavement café by opening up an entire wall in the summer months, while knowing your energy efficient Liniar bi-fold doors will also keep in the heat during the winter.

Give your showroom a new lease of life by installing Liniar bi-fold doors for ease of access, together with the highest possible security.

Thermally Efficient

Alongside their fantastic security, our ModLok™ doors offer impressive thermal efficiency. This is made possible by an intelligent uPVC profile that achieves A+ performance.