Description
Chartwell Green uPVC 4-Light Casement Window — Maximum Light, Effortless Style
If you want to flood a room with natural light while keeping strong ventilation control, our Chartwell Green uPVC 4-Light Casement Window is the ideal solution. Featuring two generously sized central fixed panes flanked by a side-hung opening casement on each side, this configuration is a popular choice for living rooms, dining areas, and open-plan spaces where both panoramic views and fresh air circulation matter.
The iconic Chartwell Green finish gives this double glazed uPVC window the character of a hand-painted timber frame — without a single stroke of a paintbrush ever needed again.
A Window Built Around Performance
The 70mm multi-chamber uPVC frame sits at the heart of this window’s thermal credentials. Combined with 28mm argon-filled sealed units, soft coat low-E glass, and a warm-edge black superspacer bar, it achieves an impressive U-value of just 1.3 W/m²K — keeping warmth in during winter and reducing solar overheating in summer.
Every unit leaves our factory fully A-rated and compliant with Part L Building Regulations, so whether you’re carrying out a full renovation or replacing a single window, you’re covered from day one.
Slim Sightlines, Bigger Views
One of the standout features of this 4-light design is its ultra-slim central meeting stile. By minimising the frame between the two fixed centre panes, we preserve as much glazed area as possible — giving you an almost uninterrupted view of your garden or street. It’s a practical design choice with a real visual impact.
The fully sculptured profile adds depth and shadow lines reminiscent of traditional joinery, making these uPVC casement windows a natural fit for both period properties and modern homes.
Security You Can Rely On
Both opening casements are fitted with a multi-point locking system and lockable push-button handles as standard. Internally beaded glazing across all four panes ensures the glass cannot be levered out from the exterior — a critical security feature that many budget windows overlook.
Patented double-action bubble gaskets run the full perimeter of each opening vent, maintaining a consistent, draught-proof seal regardless of weather conditions.
Low Maintenance for Life
The Chartwell Green finish is engineered into the uPVC profile itself — not applied as a surface coating. It will never need repainting, will not rot, warp, discolour or peel, and is backed by a 10-year profile guarantee. A simple wipe-down with a damp cloth is all it takes to keep these windows looking brand new year after year.
Specification at a Glance
- Energy Rating: A-rated | U-value 1.3 W/m²K
- Configuration: 4-light — 2 side-hung opening casements, 2 central fixed panes
- Frame System: 70mm multi-chamber thermally efficient uPVC
- Glazing: 28mm argon-filled units, soft coat low-E glass, warm-edge superspacer
- Locking: Multi-point locking on both opening casements
- Handles: Lockable push-button handles as standard
- Beading: Internal throughout for maximum security
- Gaskets: Patented double-action bubble gaskets
- Finish: Chartwell Green — guaranteed not to discolour, warp or peel
- Compliance: Part L Building Regulations
- Guarantee: 10-year profile guarantee
Made to Your Exact Measurements
- Frame Width: 415mm – 700mm
- Frame Height: 800mm – 2200mm
Every window is manufactured to order — simply provide your exact dimensions at checkout. Not sure how to measure? Our team is happy to help before you place your order.
The Right Choice for Wider Wall Openings
Where a single or double casement isn’t wide enough to fill a larger opening, this 4-light design bridges the gap beautifully. The two fixed centre panes keep the structure rigid and thermally consistent, while the flanking casements provide all the ventilation your space needs — making this one of the most practical and visually balanced configurations in our Chartwell Green uPVC window range.
