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Secure your property and add the finishing touches with the best windows, doors and roofline products available in North West England, perfect for standing up to the great British weather.


Technically advanced

The technology used in many other PVCu window profiles is at least 20 years old. Liniar's profile was designed completely from scratch in 2007 and is far more technically advanced - built for today's exacting challenges.

British made

Liniar profiles are extruded in Derbyshire at the HL Plastics manufacturing plant, which boasts the largest mixing plant in the UK. Continued investment in the factory and facilities keeps Liniar at the forefront of innovation.

Designed by experts

The Liniar range is designed, manufactured and supported by a team with over 500 years experience within the window industry.

More thermally efficient

Liniar's revolutionary profiles are far more thermally efficient than traditional PVCu window profiles. By removing unnecessary steel reinforcement, instead developing the latest in multi-chambered profile technology, we make sure the heat stays where it belongs - inside your home.

More cost-effective

Liniar profiles deliver even more energy savings for the homeowner. Liniar window systems are capable of achieving WER (Window Energy Ratings) A+12 with cost-effective double-glazing - and a U-value as low as 0.8w/m2K (with triple glazing).

Better for the environment

Liniar frames have always been 100% lead-free, well in advance of legislation. Furthermore, all elements of a Liniar window are fully and easily recyclable at the end of its life.

Less frame, more glass

Ultra-slim sightlines designed into Liniar products allow in maximum natural light - and result in more attractive windows and doors.

Strong and secure

Our windows and doors are tested to the latest security standards. PAS 24:2012 Enhanced security performance has been passed with flying colours. Built in features also mean that Liniar frames hold Secured by Design status.

Fully tested

Not only does Liniar carry out weather testing and security testing, it has invested in a robot for cyclic testing, giving customers peace of mind that their Liniar products will endure the rigours of daily living.

Beautiful colours

Liniar’s coloured foils give the appearance of woodgrain and won't peel or scratch off - and the whole Liniar range is available in a wide choice of colours with an easy clean, low maintenance finish.


Liniar profiles come with a 10 year guarantee against cracking, warping or discolouration.


Liniar windows and doors hold the following accreditation:

  • BS EN 12608:2003 (formerly BS7413) - Unplasticized polyvinylchloride (PVCu) profiles for the fabrication of windows and doors.
  • PAS 24:2012 - Enhanced security performance for doorsets and windows
  • HL Plastics (manufacturers of the Liniar brand) is ISO9001 - 2000 (Quality Systems) accredited.
  • BBA accreditation for white casement and tilt & turn windows
  • Secured by Design status for windows and doors
  • Tested to the requirements of BS7412 - Plastics windows made from unplasticized polyvinylchloride (PVCu) extruded hollow profiles.