Four metres of wide-span roof lantern — the Traverse 1600 × 4000 is built for extensions where the lantern needs to match the ambition of the space. Horizontal glazing bars stretch across the full length, and the Infinity S1 system handles this span without tie bars. Thermlock® technology, 50mm sightlines, full security.

Traverse Wide Span Roof Lantern — 1600 × 4000

At four metres in length, the SmartaView Traverse 1600 × 4000 represents the pinnacle of wide-span roof lantern design — created for spaces where scale, light, and architectural presence must work together seamlessly.

This is not simply a roof lantern; it is a defining structural feature. The extended 4-metre span delivers a continuous band of overhead glazing that transforms large extensions into bright, open environments, while the 1600mm width introduces a commanding sense of volume and light from above.

The horizontal glazing bars emphasise the full length of the lantern, guiding the eye across the ceiling and reinforcing a strong sense of flow and proportion within expansive open-plan layouts. The result is a panoramic effect that elevates the entire space.

Built on the Infinity S1 system, the deep internal bars provide the structural strength required to achieve this span without intrusive tie bars — preserving clean, uninterrupted lines throughout. Thermlock® multi-chamber thermal technology ensures that even at this scale, performance remains exceptional, delivering a 1.0 W/(m²K) centre pane U-value as standard.

Manufactured using the Infinity S1 aluminium system with Thermlock® multi-chamber thermal technology and high-performance 28mm toughened safety glazing, the Traverse is a premium choice for extensions, kitchen builds, orangeries, and contemporary architectural projects.

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Key Features & Benefits

Thermlock® Thermal Technology
Multi-chamber thermal break with 28mm glazing delivers a centre pane U-value of 1.0 W/(m²K) — far superior to traditional 24mm polyamide systems. Keeps your home warm and energy bills low.

50mm Ultra-Slim Sightlines
Consistent 50mm rafter, hip, and ridge sightlines maximise the glass area, flooding your space with natural light while keeping the frame minimal.

Ultra-Low-Line External Profile
Rafter and hip top caps sit close to the glazing level, and corner end caps run perfectly in line with the perimeter — no unsightly angles, just clean contemporary lines.

Built-In Security Specification
Anti-tamper screws, enclosed anti-tamper glazing, security tape, patent-pending glass lock, and high-security ridge end. Laminate glass upgrade available.

Integral LED Light Channel
Built into the eaves beam perimeter as standard — add subtle mood lighting for a premium finish after dark.

Co-Extruded Perimeter Seal
Eliminates draughts and rain ingress for complete weather protection.

Toughened Safety Glass
28mm argon-gas-filled toughened safety glazing, BSEN1279 compliant, with double or triple glazed options.

Fast, Straightforward Installation
Delivered in kit form with all components checked and quality controlled. Comprehensive installation guide included.

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Ideal Applications

Panoramic extensions
Wide open-plan living areas
Architectural feature spaces
Large orangeries
Prestige residential builds

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Glass & Finish Options

Clear glazing for maximum light
Solar control glazing for improved heat management
Satin (privacy) glazing for overlooked spaces
Self-cleaning and acoustic glass available on request

Standard frame colours:
Pure White (RAL 9010)
Anthracite Grey (RAL 7016)
Jet Black (RAL 9005)

Bespoke RAL colours available (matt, satin, or gloss finishes)
Dual colour option — different interior and exterior frame colours

(Options and lead times vary — speak to a SmartaView expert for advice.)

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Built for Confidence

Every SmartaView roof lantern is built on the Infinity S1 aluminium system — proudly designed and manufactured in Britain.

Weather tested to BS6375-1, rated for a snow load of 1.2 kN/m² across the whole of the UK up to 200m altitude, and set at a 25° pitch.

Supplied with a manufacturer’s guarantee, each system is carefully specified and quality checked. Our team ensures full compatibility and clarity — so there are no surprises on site.

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Need Help or a Bespoke Size?

If this standard size doesn’t suit your project, SmartaView can help with bespoke roof lantern specifications, glazing advice, and full project support.

👉 Speak to a SmartaView expert
👉 Request a tailored quote