Chartwell Green UPVC Window-design 36

Description

Chartwell Green uPVC Triple Fixed Light Window — Maximum Glazing, Unrivalled Efficiency

There are moments in home design when more is genuinely more. When the wall opening is wide, the view beyond it is worth seeing in full, and the room needs as much natural light as a window can possibly deliver — without the complexity of multiple opening vents, combination hardware, or the visual interruption of hinges and handles across the frame. Our Chartwell Green uPVC Triple Fixed Light Window is built for exactly those moments.

Three full-height panes of A-rated double glazing span the entire width of the frame side by side, divided only by two slim structural mullions and held within a clean, fully sculpted Chartwell Green uPVC border. No opening lights. No hardware. No horizontal rails. Just the purest, most generous expression of glazing that a wide wall opening can accommodate — and the highest possible thermal efficiency that any uPVC window configuration can achieve.

Three Panes, One Panoramic View

The visual impact of a triple fixed light window in a wide opening is immediate and dramatic. Where a single or double fixed pane creates a window, three full-height panes spanning the width of a generous opening create something closer to a glazed wall — an almost uninterrupted connection between the interior of the room and the world outside it.

The two slim central dividers that separate the three panes are kept as narrow as the 70mm multi-chamber profile structurally allows. At this width, they read as vertical accents rather than visual barriers — giving the eye a pair of subtle reference points while allowing the full panoramic view to register as a single, continuous image. From inside the room, the effect is of standing at the edge of the outside rather than looking through a window at it.

This is the configuration for a living room that faces an open garden. For a kitchen extension where the south-facing wall looks onto a terrace. For a ground-floor room in a new-build where the architect specified wide glazing to define the character of the space. For any opening where the view is part of what the room is for.

Fixed Windows and Thermal Performance

It is worth understanding why a fully fixed window outperforms even the best opening window thermally — because the difference is more significant than many homeowners realise. Every opening casement requires a compression seal between the moving sash and the fixed outer frame. Over years of opening and closing, that seal flexes, compresses and gradually loses its original integrity. The thermal performance of an opening window degrades over time in a way that a fixed window’s performance does not.

A fixed window has no moving sash. The glass is sealed directly and permanently within the outer frame, and the perimeter seal is static — it never flexes, never compresses under repeated use, and never degrades through mechanical movement. The result is a window that maintains its original thermal performance indefinitely.

On a three-pane fixed window at this width, the impact is meaningful. Three large sealed units of 28mm argon-filled glass with soft coat low-E coating and warm-edge black superspacer bars, set in a 70mm multi-chamber frame, achieve a U-value of 1.3 W/m²K across the full width — and that performance is locked in for the life of the window. Part L Building Regulations are met with genuine comfort, and the reduction in heat loss through what is typically the widest glazed opening in the room is both measurable on an energy bill and noticeable in the ambient warmth of the space.

The Architecture of Restraint

A triple fixed light window asks a great deal of its frame — because with no handles, hinges, or hardware to provide visual interest, the quality of the frame profile is the only thing that stands between a window that looks considered and one that looks blank. Our fully sculptured 70mm profile meets that challenge with clean moulded edges, precise mitred corners, and the kind of shadow detail that gives the frame genuine depth and definition at every scale.

In Chartwell Green, these qualities are amplified. The soft sage tone gives the frame warmth and character without competing with the glazing it surrounds. The two slim vertical dividers create a quiet rhythm across the width of the window — three equal bays of clear glass in a Chartwell Green border — that reads as intentional and resolved from any viewing distance. From the street, this window makes an immediate positive impression on the character of the elevation. From inside, it disappears into the view.

The Chartwell Green finish is co-extruded into the uPVC profile and carries a full 10-year profile guarantee against fading, peeling, warping and discolouration. These uPVC casement windows are designed to be installed and forgotten — in the best possible sense.

Security Across All Three Panes

The absence of opening hardware does not compromise security. All three panes are retained throughout by internal glazing beads, meaning the glass cannot be pushed or levered out from the exterior on any section of the window. The fixed frame perimeter is sealed and static, with no hinge gaps, no sash-to-frame contact points, and no compression seals that could be defeated by external pressure. A triple fixed light window in this specification is among the most inherently secure window configurations available — there is simply nothing to force.

Specification at a Glance

• Energy Rating: A-rated | U-value 1.3 W/m²K
• Configuration: 3-light — triple full-height fixed panes, no opening lights
• Frame System: 70mm multi-chamber thermally efficient uPVC
• Glazing: 28mm argon-filled units, soft coat low-E glass, warm-edge superspacer
• Hardware: None — fully fixed configuration
• Beading: Internal on all three panes for maximum security
• 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 to your precise dimensions. Enter your measurements at checkout for a perfect made-to-measure fit across the full width of your opening. Our team is available for sizing queries or advice on whether a fixed configuration is the right choice for your specific opening before you place your order.

When the Opening Deserves to Be Seen in Full

Some openings are too wide, too important, and too well positioned to be divided by opening casements and ventilation hardware. When the view outside is the point — when the room was designed around the light that comes in and the garden or landscape that can be seen from it — a triple fixed light window is the only configuration that does justice to the opening. Three full-height panes of A-rated double glazing, two slim Chartwell Green dividers, and a clean sculpted border that frames the view without competing with it. It is the most expansive, most thermally efficient, and most architecturally considered design in our entire Chartwell Green uPVC window range.