Superior Product Quality

Experience the best in SWI products.

Flexible Partnership

Adapting to your needs at every stage.

Industry Leadership

40+ years in the EWI industry

01942 717 100

Superior Product Quality

Experience the best in SWI products.

Flexible Partnership

Adapting to your needs at every stage.

Industry Leadership

40+ years in the EWI industry

A1 Masonry Stone Wool Mineral Render System

The majority of UK Stone Wool External Wall Insulation (EWI) render systems achieve an A2-s1,d0 fire rating. However, Wetherby’s innovative A1 system surpasses this, utilising a specially formulated basecoat, mesh, and Mineral Render finish to achieve the highest European fire classification, A1 according to EN 13501-1 standard.

The thermal benefits come from Wetherby A1 Stone Wool Insulation coated in Wetherby K&A A1 Scrim Adhesive. The system is completed with Wetherby Heck ED Mineral Render and Heck Silicone Paint, ensuring breathability and offering a wide range of colour options. Primarily for high-rise buildings, it’s adaptable to low-rise and non-traditional structures, catering to 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.

0500N

1000N

1050R90B

3040B50G

2050Y90R

1030Y20R

Colour Card

Download Thin Coat Render Colour Selection

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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 breathability.

Suitable for high-rise buildings – No height restrictions

Available in a Variety of Colours

Breathable

A1 Fire Rating

Reduced Drying Time

A1 Brochure

Download Our A1 Systems Brochure

DOWNLOAD

Innovation

The A1 Stone Wool Mineral Render System is 1 of 7 Wetherby Ofgem approved innovation systems which is eligible for a 25% uplift in funding. The Wetherby innovation systems involves an enhanced specification using stainless steel beads and fixings, following a 60 year life expectancy methodology. The system is then periodically inspected by Measure check (independent company) providing clients with reports on the system condition and allowing extended warranties to be applied for.

To request further information on our innovation systems please contact; Technical Helpline 0800 1073299 or technical@wall-systems.co.uk

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
Design Life
Impact Resistance
Hygrothermal / Freeze / Thaw Testing
Stone Wool Thermal Values Conductivity
Lambda value
Thicknesses Available
Finish Options

A1 to EN 13501-1
30 years
Category II
Pass
0.036 W/(m²k)
50mm+ = 0.036
30-40mm = 0.038
30mm – 250mm
Silicone Paint available in a variety of colours

The information contained within this website is intended for general guidance only. To obtain the most accurate and up-to-date design solutions tailored to your specific needs, please contact the Wetherby team directly.

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

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 Silco FF paint

Contact the Team at Wetherby Wall 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.

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A1 Masonry Stone Wool Mineral Render System