Riverstone Phyllite from SSQ is a premium choice for architectural stone cladding, offering a rare combination of geological strength, natural beauty, and long-term durability. With ultra-low water absorption and A1-rated non-combustibility, it exceeds the performance demands of both contemporary façades and sensitive heritage environments.
Fully certified to BS EN 12326 (W1-T1-S1), Riverstone is trusted by architects and conservation officers alike for projects that require uncompromising technical standards and timeless stone aesthetics.
Weather‑proof, colourfast and virtually maintenance‑free. Natural Split finish adds textural depth; Brushed Antique delivers a sleek, contemporary aesthetic.
Create premium reception walls, slip‑resistant flooring and statement countertops with the same stone used externally for visual continuity.
Naturally slip‑resistant—PTV 68 (dry) / 51 (wet) to EN 14231—and impervious to chlorinated or salt‑water environments.
Riverstone’s tight grain and subtle mica sheen mirror historic slates while exceeding modern performance criteria—perfect for sensitive Grade I & II refurbishments.
Contact us| Metric | Riverstone Phyllite |
|---|---|
| Water Absorption Rate (%) | 0.1 – 0.2 % |
| Density (kg/m³) | 2 790 kg/m³ |
| Fire Rating (Euroclass) | A1 (non-combustible) |
| Surface Finishes | Natural Split • Brushed Antique |
| Standard Thickness | 10 – 20 mm (custom on request) |
| Width Range | 100 – 300 mm |
| Relevant Standard | BS EN 12326 (W1-T1-S1) |
Riverstone Phyllite eliminates the uncertainty surrounding combustible façades. Its inherent non-combustibility meets the A1 classification defined by BS EN 13501-1, supporting compliance with Approved Document B without the need for additional fire testing..
Contact usSSQ offers expert guidance at every stage of your architectural stone cladding project—from concept to completion. Whether you're restoring a listed building or specifying façade materials for a contemporary commercial scheme, our team ensures compliance, performance, and visual impact.
| Project | Sector | Finish / Use | Highlights |
|---|---|---|---|
| Clarion Post Hotel, Gothenburg | Hospitality / Commercial | Random-size external cladding | Architects chose Riverstone for hard-wearing, low-maintenance cladding with distinctive grey-green tone. |
| Designer Garden, London | Landscape / Residential | Natural-split paving & feature wall | 950 paving tiles created a slip‑resistant feature terrace using Riverstone architectural stone cladding. |
| Medical Facility, Copenhagen | Healthcare / Commercial Interiors | Brushed floor tiles / wall cladding | Large-format brushed Riverstone used in flooring and wall cladding throughout this modern Scandinavian healthcare facility. |
Discuss Your Project
Our technical team specialises in commercial and public building applications, providing tailored recommendations for your specific project requirements.
View Case Studies
Over the last forty years, we’ve built up a huge amount of expertise covering natural slate, roofing, geology, specifications and so much more – and you can benefit from that, along with case studies, CAD drawings, technical PDFS and a wealth of other support.
Case StudiesRequest a Sample
The best way of judging the quality of slate and phyllite is to hold it in your hands, and examine it in detail for yourself.
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Book a CPD
At SSQ, we love sharing our decades of natural slate expertise with architects, and our CPDs are always extremely popular.
On our RIBA-approved Why Specify Slate CPD, you’ll learn about:
… and a whole lot more.
If you’re interested in booking a place on our next CPD, simply fill in this form.