Windows / uPVC Windows / Liniar
Liniar 70mm Casement Window
A classic window style, brought into the 21st century. Liniar’s market-leading 70mm profile pairs slim sightlines with genuine multi-chambered efficiency — made in Derbyshire, made to fit your home exactly.
Why choose this window
Built for how you actually live
A timeless, popular window style — reengineered with a market-leading, energy-efficient profile and slim sightlines that let in more light.
Versatile
Chamfered or sculptured styling suits contemporary and classic homes alike — as at home on a period terrace as a new-build.
Functional & energy efficient
Multi-chambered profile technology and slim sightlines let in maximum natural light while keeping the heat in — made in Derbyshire.
Fully customisable
A wide range of colours and finishes, plus mock sash horns, astragal bars, Georgian bars and patterned or etched glass options.
Genuinely secure
High-security, multi-point locking as standard, with PAS24 and Secured by Design options available for extra peace of mind.
Colours & Finishes
Available Colours
Every 70mm Casement window is available in a choice of finishes and colours to match your home exactly. Tap a swatch below to preview it.
White
RAL 9003
Technical Information
Spec at a glance
Material
PVCu
Styling
Sculptured or Chamfered
Frame Depth
70mm
Profile
Standard or EnergyPlus
Glazing
28mm, 36mm or 40mm IGU
Lowest U-Value
0.81 W/(m²K), whole window
Best Acoustic Rating
37dB (-2;-5)
Highest Energy Rating
A++
Patented Bubble Gasket
Yes
Contains Recycled Material
No
Fully Recyclable
Yes
Security & Peace of Mind
Locked down as standard
- High-security, multi-point locking as standard on every window
- PAS24 and Secured by Design options available
- Meets Part Q security requirements under Building Regulations
- Tested to BS EN 12608-1
- 10-year frame guarantee
Ready to spec your Liniar 70mm Casement windows?
Get a bespoke quote for your opening size, colour and finish, or apply for a trade account to see trade pricing on this page once you’re logged in.
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