Structural Glass Design
Walk on Structural Glass Rooflights
Design – Manufacture – Installation
Our bespoke walk on glass rooflights are designed to blend elegance with practicality and tailored to reflect your unique style and specifications.
Suitable for Commercial & residential applications
Bespoke & Customisable Walk on Glass Rooflights
APPLICATIONS: BASEMENTS, BALCONIES & FLAT ROOFS
Walk no glass rooflights integrated into garden decking.
- Location: Cheshire
20+ YEARS EXPERIENCE
4000+ INSTALLATIONS
UK MANUFACTURED
We manufacture & install the largest walk on structural glass rooflights in the UK.
Exceptional Strength
Engineered to withstand heavy loads, our glass ensures safety and reliability in every installation.
Frameless Design
Our rooflights are manufactured with a concealed stainless steel or aluminium frame.
Customizable Options
Tailor-made to fit your specific requirements, ensuring a perfect match for your project.
Thermal Efficiency
Triple glazed as standard, our rooflights are designed to provide excellent insulation.
Anti-slip surface options – Solar control – Easy maintenance
Basements & Balconies
Walk on Glass Rooflights & Lightwells
Walk on glass Balcony rooflight.
- Multiple panel configuration
- Opaque glass
- LOCATION: OXFORDSHIRE
Glass units are delivered pre-fabricated and lifted into position using vacuum lifting equipment to avoid edge damage. The joints between units are sealed using UV-resistant structural silicone, producing a seamless appearance that allows the glass to visually merge with surrounding hard landscaping.
Large Walk on glass Basement Rooflight.
- LOCATION: LONDON
The walk on rooflight comprises a multi-layered laminated glass assembly bonded with structural interlayers to form a monolithic structural pane. The top layer — the triple-laminated glass — is specifically designed to resist imposed loads and dynamic impact.
Below this, the triple-glazed configuration incorporates two additional glass layers separated by argon-filled cavities. This structure provides exceptional thermal insulation, reducing heat loss through the glazing and preventing cold bridging between the patio and the interior basement environment.
Walk on Glass Rooflights in Basement Conversions & Patios
Bringing Light Underground
Basement conversions are a popular way to create extra living space, particularly in urban areas where above-ground extensions may be restricted. One of the greatest challenges with below-ground design is overcoming the lack of natural light. This is where rooflights play a vital role — transforming dark basements into bright, welcoming, and energy-efficient spaces.
Why Rooflights Matter in Basement Design
Natural light has a powerful effect on how a room feels. Without it, basements risk being perceived as enclosed, damp, or purely functional. By introducing rooflights, architects can:
-
Maximise daylight penetration, reducing reliance on artificial lighting.
-
Improve ventilation, particularly with opening rooflight systems.
-
Enhance property value, as brighter basements are more desirable for living or working.
-
Create a sense of connection between underground rooms and outside spaces.
Glazing Options
Shaped Rooflights
Double or Triple Glazed Units
Solar Control Glass
Bespoke Ventillation Grills
Anti slip Surface Options
CURVED CLARITY: OVAL SHAPED TRIPLE GLAZED WALK-ON GLASS ROOFLIGHTS FOR SUBTERRANEAN SPACES
As architecture continues to embrace light as a building material, innovations in structural glazing have allowed designers to merge daylight, form, and function in remarkable ways. One such innovation is the oval-shaped triple-glazed walk-on rooflight — an elegant solution that combines advanced engineering with sculptural design.
Installed within patios above sub-ground rooms, these bespoke rooflights introduce daylight into spaces once confined to artificial illumination, without compromising the usability or aesthetic of the surface above. Their oval geometry softens architectural lines, creating a fluid dialogue between landscape and structure.
Walk on Triple Glazed, Multi-panel Basement / Patio Rooflights
Walk on Rooflight Specifications & Typical Fixing Details
Triple glazed, triple laminate glass, with stainless steel or aluminium frame
Standard Specification
20 Year Laminate Seal Warranty
Each walk on glass rooflight is constructed from triple-laminated, triple-glazed safety glass, engineered to withstand walk-on loads. The system comprises:
| Top Layer | Triple-laminated structural glass — three sheets of toughened heat-strengthened glass bonded with structural interlayers such as SentryGlas® or PVB for enhanced rigidity and residual strength. |
| Middle & Bottom Layers | A sealed triple-glazed insulating glass unit (IGU) incorporating Low-E coatings, argon gas filling, and warm-edge spacers to ensure optimum energy performance. |
| Support System | A discreet thermally broken frame fabricated from stainless steel or aluminium alloy, fully integrated into the surrounding waterproofing membrane. |
This configuration produces an exceptionally strong yet thermally efficient rooflight capable of achieving U-values as low as 0.9 W/m²·K, while maintaining transparency and optical purity.
Drainage, Sealing & Weatherproofing
A critical aspect of rooflight performance is the integration of effective drainage and waterproofing systems. Walk-on units are typically installed flush with surrounding paving on a recessed support frame incorporating:
-
Perimeter drainage channels to manage runoff and prevent water pooling.
-
EPDM or butyl compression seals ensuring long-term air and water tightness.
-
Thermally broken upstands to prevent cold bridging between structural layers.
The frame interfaces with the roof’s waterproof membrane, creating a continuous, weatherproof envelope between patio and interior. Periodic maintenance ensures drainage outlets remain free from debris.
Walk on Rooflights - Technical Detail Specifications
| Property | Description |
| Glass Type | Toughened and laminated safety glass |
| Overall thickness | 78mm Standard (project specific) |
| Configuration |
Triple glazed unit: • 34mm Multi-layer laminated assembly with interlayers (SentryGlas® or PVB) • 16mm Argos gas filled cavities • 6mm toughened low-E (Middle & Inner layers) |
| Slip Resistance |
Anti-slip glass pattern or Sandblasted top layer *Clear glass (no anti-slip) achieves PTV 54 (Dry) + PTV 7 (Wet) |
| Edge Detail | Frameless, Silicone sealed |
| Frame Options |
Thermally broken aluminium frame (powder coated) or Stainless steel frame |
| Waterproofing | Fully sealed perimiteter system |
| Glass options |
Clear, low-iron, privacy, solar control or tinted finishes |
| Property | Typical Value |
| Load Rating (Uniform) |
3.5 – 5.0 kN/m² (depending on span and support) |
| Load Rating (Concentrated) | Upto 2.5 kN |
| Thermal Performance (G-value) | 0.5 (depending on assembly) |
Double Glazed v Triple Glazed
| Double Glazed | Triple Glazed | |
| Overall thickness | 56 mm | 78 mm |
| U-value | 1.1 W/m2K | 0.9 W/m2K |
Need guidance on compliance?
Learn more about the UK Building Regulations and Scottish Building Standards that apply to walk-on rooflights, including structural loading, safety glazing, slip resistance, and thermal performance.
Decorative & Anti-slip Glass Options
Glass flooring and walk-on glazing systems can be enhanced through a variety of surface treatments and interlayer options to achieve the required balance of safety, privacy, aesthetics, and light transmission.
Anti-slip glass treatments provide independently tested slip resistance for applications such as floors, stair treads, landings, bridges, and rooflights, while maintaining a clean, contemporary appearance.
Decorative finishes including sandblasted opaque surfaces, ceramic fritted dot patterns, bespoke graphics, and custom designs can be incorporated to improve privacy, reduce visual transparency, or create a distinctive architectural feature.
Laminated glass can also be manufactured with coloured interlayers, offering a wide spectrum of colours and levels of translucency to complement the overall design scheme while retaining the structural integrity and performance of the glazing assembly.
Anti-slip Glass Options
Sandblasted Glass & Coloured Laminate
Technical Questions - Walk on Rooflights
Are structural calculations provided for walk-on rooflights?
Yes. Structural calculations can be provided on request and are tailored to the specific project requirements, loading criteria, and support conditions.
How are support requirements determined for a walk-on rooflight?
Edge support requirements, glass specification, and deflection criteria are assessed individually for each project to ensure compliance with structural and safety standards.
How is a walk-on rooflight weatherproofed?
Our walk-on rooflights are fully sealed using structural silicone or supplied with a thermally broken aluminium perimeter frame, providing a durable and weatherproof installation.
Are walk-on rooflights quality checked before delivery?
Yes. All rooflights are factory assembled and undergo quality control checks before being dispatched to site.
Can a walk-on rooflight be installed flush with the surrounding surface?
Yes. Walk-on rooflights are designed to be installed flush with the finished floor or roof level, creating a seamless appearance.
What types of structures can support a walk-on rooflight?
Our rooflights can be integrated into timber, steel, or concrete support structures, provided the supporting structure is correctly designed and weatherproofed.
How should a walk-on rooflight be cleaned?
For routine cleaning, use non-abrasive cleaning products and soft cloths or brushes. Abrasive tools and harsh chemicals should be avoided to protect the glass and anti-slip finish.
Customisation Questions – Walk on Rooflights
Can a walk-on rooflight include heated glass?
Yes. Heated glass can be incorporated to help reduce condensation and improve visibility in certain environments.
Are privacy glass options available?
Yes. Walk-on rooflights can be specified with privacy interlayers or switchable privacy glass for greater control over light transmission and privacy.
Can lighting be integrated into a walk-on rooflight?
Yes. Integrated LED edge lighting can be incorporated as an optional feature to enhance aesthetics and visibility.
Are bespoke shapes available?
Yes. We manufacture bespoke walk-on rooflights in a wide range of shapes and sizes, including circular, octagonal and eliptical.
Warranty Questions – Walk on Rooflights
What warranty is provided with a walk-on rooflight?
We provide a 10-year structural warranty covering the integrity of the glass and frame components.
How long are anti-slip finishes and sealants covered under warranty?
Sealants and anti-slip finishes are typically covered for between 2 and 5 years, depending on the application and level of usage.
Is the laminate seal covered by warranty?
Yes. The laminate seal is covered by a 20-year warranty.
What conditions apply to the warranty?
Warranty cover is subject to proper installation, normal use, and ongoing maintenance in accordance with the product guidance and maintenance recommendations.
NATIONWIDE INSTALLATION
HERITAGE & LISTED BUILDING EXPERIENCE
STRUCTURAL GLASS SPECIALISTS
Some of our Most Notable Structural Glass Installations
CITADELLA, GOZO, MALTA
Drive on glass floors & Walk on glass floors. UNESCO World Heritage Site.
LIDL, DUBLIN
Drive on glass floors & Walk on glass floors. Viking Archaeological Site.
CRYSTAL WALKWAY, QATAR
180 Walk on glass floor crystal display boxes & crystal clocks.
Take a Closer Look at our Projects
From heritage landmarks to contemporary developments, explore
the bespoke structural glazing projects that showcase our
engineering expertise worldwide.
What Our Clients Say
It looks amazing, it’s just inside our front door so every customer sees it on entering. It’s a real talking point.
Thank you for all your considerable help with this project, you have been first class and I will gladly forward your details & company on whenever I am asked.
Just wanted to thank you for all your help and being part of the house build. It has been an incredible journey and made many friends along the way. The end result is “Glasshouse”, something everyone involved with should be very proud of.
I was meticulous in choosing the right product for our home and having lived in the house just over a month I’ve not been disappointed.
I would highly recommend Structural glass design. Many thanks for all your help with my walk on rooflights.
Thank you all for your efforts in getting these in – Very easy to deal with and very accommodating, hopefully work together again soon!
Thanks for the great installation, it's looking fantastic as you can see from the attached.
Ready to get started?
At Structural Glass Design, we specialise in creating bespoke glass solutions for both residential and commercial projects. Send us your dimensions, photos or sketches, and we'll guide you through options, finishes and lead times.
Phone
For enquiries, call us at 0333 577 7177
Bespoke Glass Solutions
Unlock the potential of your space with our custom walk-on glass rooflight solutions. Request a quote today and explore how our high-specification glass can transform your environment. Tailored to your needs, our products promise durability and elegance.
Contact us now to learn more about our bespoke options.