Full Aluminium Design
Creating modern aesthetics with marine grade powder-coated aluminium and shallow external rafter caps for a clean, architectural look.
Roof Projection & Pitch
Achieve impressive roof pitches from from 2.5° to 30° and roof spans of up to 4500mm projection – no bolsters required
Stylish Ventilation
Optional industry leading SheerVent® technology delivers stylish, automated ventilation without compromising the sleek glass roof design.
A modern solution for every conservatory
The S3 Architectural Roof System is designed to meet the needs of today’s market. It combines precision engineering, a contemporary aluminium roof system, and installer-led innovation every step of the way.
This is the perfect solution for upgrading an old conservatory or adding a new living area. The single pitch roof is smart, simple to install, and integrates seamlessly with Sheerline’s full suite of aluminium glazing products.
- Technical Details
- Thermal Efficiency
- Design
- Spanning capabilities
The S3 is packed with technical details
- Max Roof Projection: 4500mm (no bolsters)
- Max Width: 6500mm unjointed (infinite with joints)
- Max Rafter Spacing: 1000mm
- Glazing: 28mm
- Pitch: 2.5° to 30°
- Material: Full powder-coated aluminium design
- Ventilation: Optional automated SheerVent®
- Fully thermally broken Thermlock® rafters
- Integrated aluminium gutter with baffle
A thermally efficient conservatory roof system
Our Thermlock® technology delivers market-leading thermal performance, reducing heat loss by up to 230% when compared to traditional conservatory roof designs, while a triple-lock wall plate design provides a unique thermal barrier.
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Fully integrated design
Modern aesthetics with clean lines and flush finishes, the S3’s fully integrated design includes a continuous aluminium rain baffle, an insulated eaves beam, and a fully ridged aluminium gutter complete with a welded aluminium downpipe solution to complete the all-aluminium look.
The S3 is also available in Sheerline’s full range of exquisite powder coated colours, including bespoke RAL colour options and textured finishes, from stylish metallics, to dusky greens and heritage inspired creams.
Contact UsLonger unsupported spans
Due to the inherent strength of the S3’s deep aluminium profiles, our architectural glazed roof system can allow for bi-fold spans up to 3 meters* without requiring extra bolsters for support.
* Subject to structural calculations
Contact UsKey Features
The S3 combines installer-first innovation with elegant aluminium styling for the ultimate lean-to conservatory roof.
Flush In-Line Ridge End Cap
Follows the sleek S1 roof lantern design for a consistent, refined glass roof finish.
Factory-Set Roof Pitch
The pitch of the roof is pre-set at the factory to save time and avoid on-site issues.
Deep Internal 50mm Wide Rafters
Easily joined to the Wall Plate to deliver premium aesthetics and structural strength in a visually bold format.
Thermally Insulated Rafter bars
Features Thermlock® insulation throughout, giving peace of mind and superior thermal efficiency.
40% Fewer Components
Streamlined design with 40% fewer parts than a traditional single pitch roof to simplify on-site assembly, save time and reduce risk.
Triple-Lock Wall Plate
Seamless installation and eliminates leak points, while providing a unique thermal barrier.
Aluminium solutions designed to deliver and engineered to impress
Thermlock®
Our unique Thermlock® multi-chamber technology in the eaves beams, ridges, and rafters delivers outstanding thermal insulation. It helps you meet customer expectations for warmer interiors and more energy-efficient glazed roofs.
Our co-extruded perimeter seal works alongside Thermlock® to prevent draughts and leaks. It creates a reliable weather-tight barrier that keeps rain out and heat in—giving you and your customers confidence in long-term roof performance.
FAQs
Answers to common questions about the S3 Architectural Roof System.
You can achieve up to 4500mm of roof projection without needing bolsters, simplifying the structure and reducing parts.
Yes – the S3 is perfect for retrofit projects and can be installed on existing conservatory bases.
Absolutely – the S3 is fully suited with Sheerline windows and doors for a fully integrated aluminium roof system.
Fast, simple installation
We designed the S3 with fabricators and installers in mind from the ground up. Pre-configured kits, fewer components than a traditional ‘lean-to’ system, allowing for faster on-site assembly and fewer opportunities for error, making it easier to deliver high-quality results.
The S3 has been designed for minimal disruption, including the ability to retrofit onto existing conservatory bases, so whether fitting a new build or retrofitting a conservatory, it’s a smoother process every time.
Perfectly suited to Sheerline - 100%
The S3 Architectural Roof System has been designed for the contemporary glazed extension market and is fully compatible with the complete range of Sheerline aluminium windows and doors, ensuring colour matching, continuity, and a streamlined installation process.
We give you the tools to build entire glazed extensions, complete with peace of mind at every junction.
Flush Intelligent Ventilation
SheerVent®
We’ve reimagined roof ventilation with SheerVent®, a flush-fit, thermally broken vent that blends seamlessly into our S1 Roof Lantern. Using the same 28mm glazing, it delivers reliable airflow without compromising looks, insulation, or weather protection. Designed for modern living, SheerVent® features powered actuators and can be remote controlled, or rain-sensor activated. Its ventilation made smarter – sleek, secure, and built to perform, giving your customers the comfort they want with none of the hassle.
The S3 is SheerVent® compatible, extending the seasons an S3 garden room or glazed extension can be used.
What our clients have to say
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