Welcome to Liniar

Enhance your home with the most technically advanced uPVC window system in the UK.

Quality your home deserves

Liniar profiles are manufactured using tried and tested methods, ensuring you're covered against warping, splitting and discolouration for 10 years.

Liniar 10 year guarantee

10 Year Guarantee

Liniar profiles come with a 10 year guarantee against cracking, warping or discolouration from the date of installation. You can rest assured that Liniar products are fully covered and built to last.

Liniar thermal efficiency windows and doors

Thermal Efficiency

Liniar’s commitment to innovation within their field mean they stay ahead of the competition when it comes to energy efficiency. Boasting the most thermally efficient 70mm window and door system available.

Secured By Design windows and doors

Secured By Design

Liniar are a secured by design accredited manufacturer. The gold standard in window and door security. Meaning you can be more sure than ever that the contents of your home are safe.

Why we choose Liniar

The most technically advanced uPVC window system in the UK.

Liniar innovation


Liniar's ground breaking profile system has been designed from scratch, not only to meet the technical requirements of today, but also to provide innovative solutions to long standing product compromises.

Liniar colour options

Colour Options

With a range of available frame colours our Liniar windows can complement and suit your home. Choose from colours such as traditional white uPVC, through to rich Golden Oak and stylish Rosewood.

Liniar enviromentally friendly windows and doors

Environmentally Friendly

Liniar Profiles are manufactured using 100% lead free materials. The environmental dangers of using lead are well known and providing a totally lead free range of products substantially minimises environmental impact.

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British Engineering

Liniar design and manufacture all their products from a corporate headquarters located in Denby, Derbyshire. This advanced, purpose-built facility houses the largest uPVC extrusion mixing plant in all of Europe.

Get in touch!

If you would like to find out more information about Liniar Profiles, please do not hesitate to get in touch. Our team of experienced and dedicated professionals are more than happy to answer questions you may have regarding this system.

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The Perfect Profile

Liniar has an absolute commitment to ensuring that each and every one of their products provides exceptional advantages over traditional uPVC frames. Liniar have designed an innovation system that is both thermally efficient and strong and secure, that will keep your home warm and safe.

Superior Gaskets

High performance (patented) double-action ‘bubble’ gaskets maintain tight weather seals.

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Glazing Flipper

Unique ‘glazing flipper’ gasket reduces cold transfer, water ingress and noise pollution.

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Size-optimised chambers break up mini convection currents locking in pockets of warm air.

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Integrated reinforcing

Internal structures provide exceptional rigidity while minimising the need for steel reinforcing.

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Positive Drainage

Specially designed profile contours maximise natural drainage and prevent moisture build-up.

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Thermal Dam

Designed to Passivhaus recommendations, the thermal dam reduces heat transfer.

Better for the environment

Our windows build a better future.

100% lead free

100% Lead free

Our windows are 100% lead free.The dangers of lead are well known and we are extremely proud to supply one of the few window systems to offer an entirely lead free range of products.

Recycling windows and doors

Commitment to recycling

Our uPVC windows are extremely robust and do not need expensive steel reinforcement. They are therefore 100% recyclable making them a truly environmentally friendly product.

Reducing carbon footprint

Reduce your carbon footprint

Having uPVC windows installed throughout your property will reduce the amount of energy you use and can lower your CO2 emissions by approximately 2/3 of a tonne (680kg) each year.

Latest News

How to market windows and doors even during challenging times

With the cost of living increasing rapidly, homeowners are starting to feel the pinch as day-to-day living expenses and household bills rise. In April, heating and fuel costs rose while national insurance also went up. October is expected to bring another increase in energy bills, and inflation is expected to peak at 8.7% in the […]

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Design your windows or doors

Try our simple tool and find the perfect window or door for your property. Choose the colour, handles, and accessories at the touch of a button.

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We stand by the quality and security of our products and as such we are a fully accredited manufacturer of uPVC windows and doors.