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  • The S1 Premium Aluminium Roof Lantern Collection

    Ultra-Slim Sightlines. Uncompromising Security. Engineered to Impress.

    Maximise natural daylight and elevate your architectural designs with the UK’s premier flush-closing aluminium roof lantern system, supplied directly by TekFab. Specially engineered for rapid installation and exceptional thermal efficiency, this advanced system combines minimalist aesthetics with ground-breaking security features.

    Whether you are a trade installer looking for a reliable, fast-turnaround system or a homeowner designing the perfect flat-roof extension, our tailored S1 supply service delivers peerless performance.

Products /
Learn More About Our Roof Lanterns
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Ridged Roof Lanterns
Vented Roof Lanterns
Pyramid Roof Lanterns

Rapid 7–10 Day Site Delivery

We understand that project timelines are critical. While other custom glazed structures can take up to six weeks, our streamlined supply chain and rapid turnaround service ensures your bespoke roof lantern arrives safely on-site in just 7 to 10 working days.

Ultra-Slim 50mm Sightlines

Say goodbye to bulky, intrusive frameworks. This premium system features architectural-grade slimline aluminium rafter profiles measuring just 50mm wide. This maximises the glass area, flooding your living space with clear sky views and natural light without compromising structural integrity.

Advanced, Locked-Glazing Security

Rooflights are historically a vulnerable point in home security—not the S1. Featuring an innovative, hidden glass lock system alongside tamper-proof fasteners and concealed fixings, this engineering completely eliminates the risk of intruders removing the external glazing caps.

Peerless Thermal Efficiency

Stay warm in the winter and cool in the summer. Built with multi-chambered thermal break technology, the system completely prevents cold bridging. Paired with high-performance, co-extruded perimeter glazing, it delivers exceptionally low U-values that exceed standard UK building regulations.

Fast, Fit-and-Forget Installation

Time on-site is money. This system is intelligently designed with installers in mind, featuring click-fit rafter caps, pre-drilled components, and a seamless structural design that cuts installation time in half compared to traditional lanterns. No complex glazing kit or specialist tools required—just a fast, straightforward fit that lets you move on to the next job sooner.

Sleek Architectural Aesthetics

Elevate any property with a look tailored precisely to the project. Available in minimalist Matt Black, sleek Anthracite Grey, or crisp Gloss White—as well as dual-colour options to match internal decors—the system features a durable, marine-grade powder coating built to withstand the harshest weather. Combined with an ultra-low profile top cap, it sits beautifully flush against flat roof extensions for a premium, architectural finish.

The UK’s most secure lantern,
keeps you and your home safe

The innovative construction of the S1 system eliminates the security weaknesses of traditional lantern designs. Features such as anti-tamper screws, enclosed anti-tamper glazing, security tape and a patent pending glass lock, alongside a unique high security ridge end, ensure there isn’t an easy way to enter your property via your flat roof lantern. All of these innovative features combine to make the S1 system the UK’s most secure aluminium lantern roof*.
*Mainstream residential roof lantern - not utilising bonded glass.

Alutherm Lantern Roof - Assembly

Whatever the weather Thermlock® technology helps keep you comfortable and heating bills lower

The S1 lantern combines aluminium’s clean lines with exceptional thermal performance and features our innovative Thermlock® multi-chamber technology to keep you and your property well insulated against the worst of the UK weather. This coupled to high performance 28mm glazing means our lantern roofs offer class leading thermal performance, far superior to traditional polyamide systems based around 24mm glazing. A unique co-extruded perimeter seal also ensures draughts and rain are kept safely outside. 28mm glazing also allows acoustic dampening glass to be fitted if required.

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28mm glazing 1.0 U-value W/(m²K)*

Thermal transmittance, also known as a U-value, measures the rate of transfer of heat. The better-insulated a window is, the lower the U-value will be.

*Centre pane U-value. Subject to glass specification.

Alutherm Lantern Roof - Sheerline - Thermal
Alutherm Lantern Roof - Sheerline - Corner

With great looks from every angle – due to our unique ultra low line aesthetics

Slim, consistent 50mm rafter, hip and ridge sightlines maximise the light flooding into your home, creating bright, airy interiors and banishing gloom. The S1 lantern also features ultra low line aesthetics so rafter and hip top caps sit close to the glazing level on the exterior, creating a sleek modern look. Completing this refined architectural appearance our corner and rafter end caps run perfectly in line with the perimeter of the lantern, so no unsightly angles jut out to spoil the perfect lines of this outstandingly beautiful high-performance aluminium lantern. Leaving you with the ideal balance of understated refinement, contemporary looks and exacting quality standards.

ULTRA SECURE

THERMALLY EFFICIENT

Our S1 aluminium roof lantern has a low u value of 1.0 made possible by its 28mm advanced glazing unit* and Thermlock ® multi chamber technology. And with 50mm consistent rafter sight-lines this lantern looks stunning in any design from pyramid to grander options suitable for larger orangery style installations. 


* Centre pain pane U-Value. Subject to glass specification

28

mm Glazing

1.0

U-Value

50

mm Rafter

10

Different Lantern Styles

With a wide range of styles and sizes to suit every project

S1 aluminium roof lanterns are available in a choice of 10 styles from square ‘pyramid’ designs to grander options suitable for larger ‘orangery’ style installations. Maximum sizes range from 2.4 up to an impressive 6m long, all set at a 25˚ pitch and all weather rated for the whole of the UK*. Rated for a snow load of 1.2 KN/m2. Covering the whole of the UK up to 200m altitude.

Alutherm Lantern Roof - Sheerline - Pyramid
Alutherm Lantern Roof - Sheerline - Internal

LED Lighting Option

S1 lanterns also feature an integral LED light channel around the perimeter of the roof – giving you an easy way to add mood lighting and add the final touch of individuality to your interior.

Ridged Roof Lanterns
Vented Roof Lanterns
Pyramid Roof Lanterns

​Get ​Your Trade/DIY Direct Supply Price in Minutes

Ready to quote or order? Use our interactive lantern configurator below to submit your custom dimensions, lantern style, and options. Our technical team will calculate your precise structural requirements and return a competitive, supply-only quote direct to your inbox.

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