A partnership built on quality and innovation
At Pearl Window Systems, we believe exceptional products start with exceptional systems. That is why we manufacture using Liniar's innovative PVCu profile range.
Designed from the ground up, Liniar systems combine advanced thermal performance, security, sustainability and installer-focused design.
Together, Pearl and Liniar deliver dependable, high-performance windows and doors manufactured for today's demanding market.
British engineering at scale
The Liniar range is designed, manufactured and tested at their purpose-built extrusion facility in Derbyshire.
With some of the UK's most advanced PVCu extrusion capabilities, Liniar continues to invest in technology, automation and manufacturing efficiency.
Their twin PVCu mixing plants, among the largest in Europe, process up to 120,000 tonnes of raw material annually, delivering consistent quality and production flexibility.
Precision manufactured. Quality controlled.
Every Liniar product is produced under strict quality standards, backed by ISO 9001 accreditation and comprehensive testing procedures.
This commitment to manufacturing excellence gives Pearl installers confidence that every window and door is built to perform.
Designed for energy efficiency
Modern window systems need to deliver more than appearance. They must provide outstanding thermal performance, security and long-term reliability.
Liniar developed advanced multi-chambered profiles to improve insulation while maintaining strength and secure hardware fixing.
Thermal Performance
Multi-chambered profiles engineered to improve energy efficiency.
Security Focused
Designed to provide strength and reliable hardware performance.
Installer Friendly
Systems created with fabrication and installation efficiency in mind.
The complete Liniar range
From advanced window systems to high-performance doors, Liniar provides a complete PVCu solution designed around modern building requirements.
Windows
Casement, Flush Sash, Tilt & Turn, Bow & Bay and Bi-Fold systems.
Doors
Residential doors, French doors, Patio doors and Bi-Folding doors.
Innovation
Future-focused designs developed for performance and efficiency.
British manufacturing in action
Manufactured by Pearl. Built on Liniar innovation.
Combining Pearl Window Systems manufacturing expertise with Liniar's advanced profile technology, we deliver high-performance windows and doors trusted by installers across the UK.