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About Us

The most up-to-date brand of uPVC frames on the market, Liniar was created by bringing together some of the most knowledgeable and forward thinking designers in the window industry – with more than 500 years of experience between them. With a focus on research, development and design, the Liniar range continues to push the boundaries when it comes to product innovation. Continued investment in infrastructure, technology and a great team of people has brought market-leading success and sustainable growth. At Liniar, we understand that customers want everything to match. That’s why our product range spans not only windows, doors and roofs, but lots of clever design ideas for your home such as bi-folding doors and windows to give your home that real ‘wow’ factor. Our matching range of silicones also ensures a perfect finish for coloured installations. Our designers love coming up with new product development ideas, and Liniar has built a well-deserved reputation in the window industry as one of the most innovative systems companies around. This culture is embedded throughout our business, a fact of which we’re justifiably proud. Liniar – the brand Liniar’s trading company, HL Plastics, has been a leading name in the uPVC extrusions industry since 1974. Located in the heart of the UK, Liniar’s in-house team designs and manufactures the entire range of lead-free uPVC products, helping to build a reputation for innovation. Liniar manufactures three different ranges of products, supplied to a variety of different markets: Liniar fenestration products (windows, doors and conservatories) – supplied to window and conservatory fabricators to make into finished products; The Liniar decking and fencing range – for caravan parks, holiday homes and domestic gardens; Liniar’s range of plastic piling – for retention, construction, waterways, flood prevention and road and rail infrastructures. The Liniar brand has become synonymous with innovation and its products are recognised as being among the most modern in their respective fields. HL Plastics’ state-of-the-art factory played host to the Prime Minister in 2014. David Cameron held a Q&A session with 150 members of staff, giving praise to the team for its impressive growth.

Services Provided

Double Glazing, Window Installation, Window Replacement, Windows, Bi-fold Doors, PVCu Doors, Patio Doors, French Doors, Aluminium bi-fold

Areas Served


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Contact Liniar
Flamstead House
Denby Hall Business Park
Denby, Derbyshire DE5 8JX
United Kingdom
United Kingdom
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