Window system
Liniar
Mainstream, marketed heavily on thermal design and British manufacture.
Overview
About Liniar
Liniar is a comparatively modern, UK-designed system. It is often presented to homeowners on the strength of its chambered thermal design and the fact it is made in Britain.
It is a genuinely capable system. As always, the specification quoted around it — glass, hardware, reinforcement approach — determines what you actually get.
Ownership: UK-designed PVC-U system, manufactured in Britain.
Ranges
Ranges within this system
Casement
The core replacement window range.
Flush sash
Timber-look flush external appearance.
Specification
What we know — and what we don't
| Material | Multi-chambered PVC-U |
|---|---|
| Manufacture | UK-designed and UK-manufactured system |
| Frame depth | Pending verification* |
| Sightlines | Pending verification* |
| Glazing capability | Pending verification* |
| Published U-value range | Pending verification* |
* We only publish figures such as frame depth, sightlines or U-values once they are confirmed against current manufacturer literature. Ask your installer for the specific figures that apply to the range they have quoted.
Weighing it up
Strengths and considerations
Strengths
- Modern chambered design developed relatively recently
- British manufacture, which shortens supply chains
- Flush and standard casement appearances both available
Considerations
- Marketing around thermal design can overshadow the glass unit, which usually has more effect on the result
- Fewer decades of UK track record than the older German systems
Where it fits
Typical applications
- Whole-house replacements
- Homeowners prioritising energy performance
- Projects wanting a British-made system
Before you sign
Questions to ask your installer
- 01Is this the casement or the flush range?
- 02How is the frame reinforced?
- 03What U-value is being quoted for the finished window, glass included?
The Glazora view
A strong mainstream option. Ask for the whole-window figure rather than a frame-only claim, and compare it on the same basis as every other quotation.
See how Liniar compares directly against another system, or get a quotation based on your own property.