The largest Traverse in the range — 4.4 metres of panoramic, wide-span overhead glazing. The 1800 × 4400 is engineered for dramatic full-width extensions and architectural feature spaces where nothing less than a statement lantern will do. Infinity S1 system with Thermlock® thermal technology and built-in security.

Traverse Wide Span Roof Lantern — 1800 × 4400

The largest Traverse in the Apex Collection — and the ultimate expression of wide-span roof lantern design. At 4.4 metres in length and 1800mm in width, the SmartaView Traverse 1800 × 4400 is engineered for projects where the roof lantern is not just a feature, but the defining centrepiece of the entire space.

At this scale, the impact is immediate. A continuous expanse of overhead glazing transforms large extensions and open-plan environments, flooding the space with natural light while creating a striking sense of volume and openness.

The horizontal glazing bars run the full length of the lantern, reinforcing a strong architectural rhythm and guiding the eye across the ceiling — delivering a panoramic effect that elevates both the design and experience of the room below.

Every element of the Infinity S1 system plays a critical role at this size. Deep internal bars provide the structural integrity required to span without intrusive tie bars, preserving clean, uninterrupted lines. Thermlock® multi-chamber thermal technology ensures the performance matches the ambition, maintaining a 1.0 W/(m²K) centre pane U-value even across this substantial glass area.

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

Dramatic full-width extensions
Architectural feature spaces
Grand open-plan living areas
Commercial reception areas
Showpiece installations

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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