01942 717 100
01942 717 100
info@wbs-ltd.co.uk
Steel Frame A1 Stone Wool Mineral Render System
The Direct Fix Steel Frame System allows installation of A-rated systems to a sheathed steel frame substrate. Eliminating the need for a cavity and cavity fire-stopping behind the A1 Stone Wool insulation. Suitable for various projects like schools, student accommodations, and high-rise reclads, it has been popular since its 2022 launch.
Wetherby’s A1 EWI render system achieves the highest European fire classification, A1 to the BS EN 13501-1 standard. Thermal benefits come from Wetherby A1 Stone Wool Insulation coated in Wetherby K&A A1 Scrim Adhesive, ensuring strong adhesion with mineral-based components.
Finishing with Wetherby Heck ED Mineral Render and Heck Silicone Paint enhances breathability and offers a range of colors. Commonly used on high-rise buildings for premium fire performance, it is also adaptable to low-rise buildings and non-traditional structures, making it a versatile choice for safety-conscious specifiers.
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Colour Availability
We have a comprehensive range of 100 standard colours that are available for our Silicone Paint, used to overcoat Mineral Render. With a variety of vibrant and durable options, our silicone renders are designed to enhance the aesthetic appeal and longevity of your projects. Discover our extensive colour range by downloading our brochure below.
Wetherby A1 Stone Wool Mineral Render System Components
Benefits of our A1 Stone Wool Mineral Render System
The A1 Stone Wool Mineral Render System is a revolutionary solution, designed to elevate your projects. This advanced insulation system provides many benefits going beyond traditional methods, offering unmatched performance, sustainability, and cost-effectiveness.
Technical Information
Specifying an External Wall Insulation system that is suitable for your project can be a challenging practice. Our technical team are on hand to provide detailed job specific specifications and any technical assistance you may require.
| Fire Classification | A1 to EN 13501-1 |
| Design Life | 30 years |
| Impact Resistance | Category II |
| Hygrothermal / Freeze / Thaw Testing | Pass |
| Sheathing Board | Fibre Cement Board (BS EN 12467) CPB (BS EN 12467 / BS EN 634-2) Ply (BS EN 313-1) OSB (BS EN 300) |
| Stone Wool Thermal Values Conductivity | 0.036 W/(m²k) |
| Lambda value | 50mm+ = 0.036 30-40mm = 0.038 |
| Thicknesses Available | 30mm – 250mm |
| Finish Options | Mineral Render with Silicone Paint, available in a wide range of colours |
Typical U-Values
Wetherby Stone Wool insulation offers a 0.036 W/(mK) K value, requiring just 100mm thickness to meet UK refurbishment property U-value standards in the majority of cases.
Technical Data
Technical Drawing Set
Our technical drawings are currently being updated. To request the latest version contact; Technical Helpline 0800 1073299 or technical@wbs-ltd.co.uk
Operations & Maintenance Manual
KIWA Certification BAW-21-201-S-A-UK
Specification with NBS
*Some new build insurers such as NHBC, Premier Guarantee and LABC insist on a drainage cavity on new build housing projects. Therefore a Wetherby cavity rail system would be the best solution. Please see the links below to view suitable Wetherby cavity rail systems.
Product Information
At the core of our Stone Wool Silicone Render system lies Rockwool insulation, providing outstanding thermal performance, unparalleled breathability and superior acoustic properties in comparison with other insulants on the market. Stone Wool is classified as A1 non-combustible as an individual product.
- Outstanding thermal and acoustic properties
- Non combustible
- Easily cut and shaped
- Can be installed to flat & curved surfaces
- Open cell structure allows the façade to breath
Wetherby Mineral Render tackles is an ideal product to apply in adverse weather conditions. Its chemical reaction enables drying in damp and high humidity, independent of atmospheric conditions. The standard off-white finish can be transformed with the application of silicone paint as a final top coat, which is included within the fire classification.
- Dry’s independently of humidity
- Highly breathable
- High water-resistance
- Easy application
- Wide colour range available using WBS Silicone FF paint
Case Studies
Discover real-world examples where challenges were met with innovative solutions, and obstacles transformed into opportunities.
Kingsway House, Warrington
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Gala House, Nottingham
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Bath Court, Birmingham
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Mountford House
Read MoreRelated EWI Systems
We have developed a range of EWI systems ideal for use with various construction methods, view the other systems.
Contact the Team at Wetherby Building Systems
We understand that embarking on a construction project is a significant endeavor, and we’re here to support you every step of the way.
If you have any inquiries, require additional information, or would like to discuss your specific project needs, please don’t hesitate to reach out. Our dedicated team of experts is ready to listen, collaborate, and provide tailored solutions.
