Innovative PVCu extrusions
and creator of the Liniar brand


Trade extrusion company HL Plastics Limited was started by Godfrey Harris and Stuart Leese in a 10,000 ft factory at Riddings in Derbyshire in December 1974. Since then, the company has been through several transformations to reach its current status as one of the Amber Valley’s largest employers. Here are some key milestones in the company’s history.

1977 The factory is moved to new purpose-built 17,000 sq ft premises in Little Eaton, Derbyshire.

1981 HL’s first own-brand product range is launched – Suregrip Duckboard System for roof walkways.

1988 A management buyout is led by Roger Hartshorn and Mike Bosworth.

1989 Tarpey Harris Precision Toolmakers is purchased to gain access to the latest toolmaking technology and enable future development.

1990 Second own-brand product range is launched – a range of cellular foam building products to supply the growing base of window customers.

1991 HL creates the Eurocell brand to launch its building product range.

1993 A range of PVCu plastic piling is launched, using recycled plastic and in-house injection moulding is developed.

HL's plastic piling range was launched in 1993

HL’s plastic piling range was launched in 1993

1994 HL designs and launches its third new product range – the Eurocell Ultimate 70mm Window System. First trade centre is opened in Dorset.

1995 The Eurocell warehouse and distribution is relocated to Cotes Park, Alfreton – a 63,000 sq ft facility.

1997 A new factory is built in Alfreton to enable Eurocell to manufacture its own products.  HL Plastics remains at Little Eaton.

1998 Tessenderlo Group acquires a 75% stake of the group.

1999 HL develops the verandah and decking system. Eurocell develops its inline sliding patio door.

HL's decking system was launched in 1999, later to become the first Liniar product

HL’s decking system was launched in 1999, later to become the first Liniar product

2001 HL develops Suredeck Safety Platform. Eurocell develops a conservatory roof system – Pinnacle – and the co-extruded Logik 70mm system.

2003 Tessenderlo Group acquires total ownership of the group.

2005 Roger Hartshorn and Mike Bosworth form a new company, Flamstead Holdings, to buy back HL Plastics and Tarpey Harris from Tessenderlo Group. Tarpey Harris starts up a wax injection department.

2006 Construction begins on the new factory site for HL Plastics and Tarpey Harris in Denby, the former site of Denby Hall Colliery. The Liniar brand name is launched, initially for the decking system.

The Denby Hall Colliery in 1880

The Denby Hall Colliery in 1880

2007 All companies relocate to the new factories in Denby. The Liniar fencing and gravel board system is launched.

2008 The brand new Liniar window chamfered system is launched – the first system ever to incorporate strength and energy efficiency in one window profile.

The Liniar window system was introduced in 2008

The Liniar window system was introduced in 2008

2009 The Liniar sculptured system is launched, in addition to a new Liniar verandah hand rail system and recycled deck profile.

2010 The Liniar bi-fold door system is launched, the first PVCu bespoke bi-fold of its kind. The Liniar EnergyPlus range is also launched, with even higher thermal performance.

The Liniar bi-fold was the first of its kind

The Liniar bi-fold was the first of its kind

2011 The Zoom Liniar conservatory roof system is launched. Tarpey Harris launches a specific tool maintenance department.

2012 HL builds a new 60,000 sq ft warehouse next to main HL Plastics production plant to keep all products on one site. The Liniar inline sliding patio door with patented ModLok security is launched.

2013 HL opens new lamination plant a few miles away together with a new 60,000 tonne capacity mixing plant on same site. Liniar Log Pile is launched, providing a hard engineering retention solution with a soft engineering appearance. Liniar’s brand identity is refreshed.

The state-of-the-art mixing plant opened in 2013

The state-of-the-art mixing plant opened in 2013

2014 Flamstead Holdings buys Wegoma Machinery Sales. A new generation of bi-folding doors is launched with the Liniar ModLok bi-fold. Liniar Zoom roof kits are launched in matching colours. The Liniar Flush Sash window system is introduced for traditional dwellings. Prime Minister David Cameron visits the factory. HL Plastics celebrates its 40th birthday and wins awards including Derby Telegraph Company of the Year and Growing Business of the Year for mid-sized companies.

Liniar Zoom roofs were launched in kit format in 2014

Liniar Zoom roofs were launched in kit format in 2014

2015 The Flamstead Holdings Group, including HL Plastics, Vintage Windows and Avantek Machinery is purchased by Quanex Building Products, with Hartshorn remaining as Group CEO as part of the deal. A range of PVCu foam window trims is launched, together with Liniar Approved installation supplies including cleaners, silicones and adhesives.

2016 The Alumina bi-folding door is launched, as well as a new range of PVCu foam fascia boards and soffits. Work commences on a new 178,000 sq ft warehouse to allow for further growth including new employment opportunities.

2017 EnergyPlus90 is launched, a 9 chamber system achieving Passive House standards. The new 178,000 sq ft Liniar House is opened and the foiling facility is relocated to Denby from Alfreton. The ModLok bi-folding door is awarded a Queen’s Award for Innovation.