ULTRA ENERGY EFFICIENT WINDOWS ZERO|90

Comprising a full range of window styles, Zero|90 is ideal for both new and existing buildings.

Choose white frames, or select from a choice of beautifully foiled colours, all fully matched to the rest of our range for wider project development. Although Zero|90 windows are 90mm deep, they look exactly the same as our 70mm PVCu windows, with similar slim sightlines. The frame depth allows for triple and quadruple glazed units, meaning the multi-chambered thermal and acoustic properties of the windows are significantly enhanced when compared to standard double-glazed windows.

Technical information

Frame Depth – 90mm ProfileZero|90 with recycled core
Lowest U-Value – 0.66 W/m²K (Whole window)
Best Acoustic Rating – 42 (-2;-6)
Highest Energy Rating – A++
Passivhaus Compliant – Yes
Patented Bubble Gasket – Yes
Contains Recycled Material – Yes
Fully Recyclable – Yes
Material – PVCu

Zero Comparison

Zero|90, Liniar’s 90mm uPVC casement windows, are unlike any other casement windows in the UK today. They may look similar from the outside, but the technology included inside the frames gives them one of the highest whole-window energy performances on the market.

Zero Compromise

Designed for maximum thermal efficiency and up to 50% noise reduction compared to standard double glazing, they deliver whole-life carbon savings and everyday comfort without compromise.

Zero Waste by Design

Zero|90 Casements are the UK’s first Passivhaus-certified uPVC casement windows—setting a new standard in sustainable building.

✅ Low-Carbon Manufacturing: Made in Britain using sustainable practices.

🔄 Circular by Nature: Built with recycled materials and fully recyclable at the end of life.

♻️ Whole-Life Impact: Designed to reduce carbon from construction through to deconstruction.

Zero|90 delivers high performance with minimal environmental impact—without compromise.

Zero|90R: Retrofit-Ready, Future-Focused

Zero|90R casement windows are designed for more than just new builds—they’re retrofit-ready and fit seamlessly into existing 70mm window cavities thanks to their rebated 90mm profile.

With millions of UK homes underperforming on energy efficiency, Zero|90R offers installers a powerful solution to help homeowners cut carbon, reduce bills, and move closer to Net Zero—without the need for major structural changes.

RATING

LOW U VALUES

VARIOUS FRAME OPTIONS

28MM, 48MM, 56MM IGU GLAZING

Brochures

Zero 90 Consumer Brochure

Zero 90 Fact Sheet

A WORLD OF COLOUR

Gone are the days when PVCu windows were only available in white.

Whether you want simple understated windows, a natural wooden look or want to make a bold statement, we offer the colour options and finishes to suit your preferences.