Windows / uPVC Windows / Liniar
Liniar Windows
Multi-chambered uPVC profile technology, designed and made in Derbyshire. From classic casements to timber-look flush sash, explore the Liniar window styles we build to measure and fit ourselves.
Who they are
Britain’s most innovative window profile system
Liniar design, manufacture and test their uPVC profiles at a state-of-the-art facility in Derbyshire, backed by parent company Quanex Building Products. It’s why we chose them as one of our core uPVC window partners.
UK-First
innovations & patents in profile technology
ISO 9001
certified manufacturing standards
~30 Years
of zero PVCu waste sent to landfill
Queen’s Award
for Innovation
Explore our Liniar window types
Find the right Liniar window for your home
We’ve moved away from a drop-down menu of every Liniar style — here’s the full range we build, in one place, so you can see what each one offers before you get a quote.
70mm Casement Window
A classic window design offering versatility when it comes to style choices. Liniar’s uPVC casement windows are a market-leading, energy efficient addition to any home, available in 70mm Standard or EnergyPlus profiles for genuine multi-chambered performance.
View Our Casement Windows →
70mm Flush Sash Casement
The sash sits flush within the frame with no external overlap, just like a traditional timber window — bringing period charm to any property. Mechanically jointed rather than welded for extra authenticity, with a range of woodgrain foiled finishes available.
View Our Flush Sash Windows →
80mm Resurgence Flush Sash
Liniar’s most advanced flush sash system, and the UK’s first double-rebated uPVC window — no visible external gasket, for a genuinely seamless, timber-look finish. A+ energy ratings and U-values down to 0.84 W/(m²K) make it ideal for heritage and character properties.
View Our Resurgence Windows →
70mm Tilt & Turn Window
Designed to offer a secure, multi-functional style choice, helping to increase a building’s ventilation. Tilt inward for controlled airflow, or open fully for easy cleaning and fire-escape access — with slim sightlines and Liniar’s patented bubble gasket throughout.
View Our Tilt & Turn Windows →Why choose Liniar
Built on multi-chambered profile technology
Energy efficient
Multi-chambered profiles and warm-edge glazing keep U-values low and homes warmer for longer.
Genuinely weatherproof
Liniar’s patented bubble gasket seals out draughts and rain without a visible external strip.
Secure as standard
Multi-point locking on every window, with PAS24 and Secured by Design options across the range.
Made responsibly
Designed and manufactured in Derbyshire, with close to 30 years of zero PVCu waste sent to landfill.
Buying for trade?
Trade pricing on every Liniar window we stock
Trade account holders see trade pricing on our Liniar pages once logged in, alongside dedicated rep support and fast turnaround.
- Trade pricing shown once you’re logged in
- Direct access to quoting and ordering support
- A dedicated rep and reliable turnaround
Not trade yet?
Applications are reviewed by our team — it only takes a few minutes to apply, and we’ll be in touch to get your account set up.
Not sure which Liniar window’s right for you?
Get in touch and one of our team will help you choose the right style, spec and finish for your home.
Get a Quote