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The Liniar Range

One of the newest and most technically advanced window systems on the market, Liniar was designed from scratch to take advantage of the very latest developments in uPVC window engineering technology.

The multi-chambered design of the Liniar profile, or window frame, makes it far more energy efficient than other PVC window systems. The EnergyPlus system achieves an A+ energy rating with cost effective double glazing and has the ability to create a carbon neutral dwelling by adding triple glazing, if required.

Made from lead-free, fully recyclable uPVC, Liniar windows and doors offer many benefits for fabricators, installers and end users, designed as they were with the wisdom of over 500 years of industry experience.

The Liniar range offers a selection of different window styles and designs, together with fully matching products including residential and composite doors, bi-folding doors, patio doors, French doors and conservatories. All products are available in a wide choice of colours and foils to give homes, offices and commercial developments a fully bespoke appearance.

A nationwide network of Liniar fabricators manufacture the finished windows and doors to Liniar’s exacting high standards – find your nearest fabricator.

The Liniar conservatory roof matches perfectly with its range of uPVC windows and doors and enables homeowners to benefit from one of the most thermally efficient conservatories in the UK.

With a design team constantly looking to enhance the roof beyond its already high standards, the Liniar conservatory roof includes patented technology such as its anti-slip glazing retainer and EnergyPlus twin wall top cap for robustness and thermal efficiency.

Available in a wide choice of colour and foiled options, each Liniar roof is individually designed and built to meet your exact needs, and supplied to installers in kit format. With built-in features enabling fast fitting and easy on-site adjustment, you can be sure of a smooth installation.

Each Liniar roof comes with a choice of polycarbonate or glass panels, with over 20 variations of sealed unit options and tints, including self-cleaning glass.  The Liniar roof can also be supplied as a lantern-style roof for use in orangeries, and teams perfectly with Liniar’s bi-folding doors to open up an entire wall of your home.

Liniar conservatory roofs can be ordered through a Liniar Approved Fabricator – find your nearest fabricator.

The Liniar decking and fencing range was developed primarily for the holiday home market but all products are also ideal for a maintenance free garden. Made from the same lead-free uPVC as the window and door range and up to 86% recycled content, there’s no sanding, painting or staining required to keep them looking their best.

Liniar deckboards are 225mm wide with a tongue and groove design and have concealed fixings for an attractive finish. You can be sure they won’t rot, rust, warp or splinter, unlike timber deckboards. Liniar decking is designed to be built on a galvanised steel sub-frame, offering superb strength and durability.

The Liniar balustrade system features the only fully sculptured range on the market, available in a wide range of colours and foiled finishes and a choice of attractive pickets, skirting, caps and other accessories.

Liniar fence posts and gravel boards are installed in exactly the same way as more traditional fencing products such as concrete or timber, but are lighter to carry and require less maintenance.

The Liniar decking and fencing ranges can be ordered direct from Liniar or you can find an approved Liniar installer.

The Liniar range of piling and retention systems is used by a wide variety of industries and organisations all over the UK, as well as the domestic market. With unparalleled versatility, plastic piling is made from 100% recycled PVC and offers a lightweight, cost effective alternative to more traditional steel piling.

From the rail network to flood defence systems, from construction and landscaping to environmental applications and the erosion prevention of ponds and waterways, Liniar piling is ideal for water and soil retention. What’s more, it’s made in the UK, making it even more eco-friendly.

Liniar plastic piling is available in six different styles including full pan pile, trench pile, flat pile, z-ribbed and box format piling as well as Liniar’s innovative log pile. The latter can be used anywhere due to its supreme strength, but also adds a decorative finish to parks, gardens and public areas. Lightweight to carry, plastic piling is surprisingly strong and sturdy, and has even been installed up to 11.5m deep.

Liniar uPVC piling can be ordered direct from Liniar and delivered to almost anywhere in the UK using our own transport. Find out more here.

All Liniar Products are Made in Britain

Made in Britain

The Liniar range is designed, manufactured and tested by HL Plastics at its modern extrusion facility in Derbyshire.



Every product in the Liniar range is lead-free, energy efficient, recyclable and easy to transport, to protect our environment.

Customer Focused


Liniar invests in its product range for the benefit of customers, helping them to grow their own businesses in return.

Quality Assured

Quality assured

All products have been subject to the strictest quality standards, in a factory backed with ISO 9001 accreditation.

Fully Tested Products

Fully tested

Liniar products are put through exhaustive testing processes to ensure they are robust, durable and built to last.

All Liniar Products are covered by a 10-year guarantee


All Liniar products are guaranteed (please see individual product details for specific details of guarantees).