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A1 Non-Combustible EWI Systems

Introducing breakthrough EWI systems achieving an A1 non-combustible fire rating.

An A1 rated fireproof insulation solution in the UK for building facades, exclusively available from Wetherby. The A1 System range sets new standards in external wall insulation fire performance.

The render system options are finished with Wetherby Heck ED Mineral Render finishing coat, which is ideal for use with stone wool insulation, providing great breathability. While the brick slip systems offer a durable real clay brick finish in a wide range of colour options.

To achieve an A1 rating, the system must be classified to EN 13501-1 using the following fire tests.

  • EN 13823 SBI (Single Burning Item) – Used to determine the reaction to fire by exposing a flame to the system finish.
  • EN ISO 1716:2010 – Bomb test. Each component of the system is ‘blown up’ to measure heat output (calorific value). All components must be A1.
  • EN 1182 – xxxxx

Testing and Certification

As one of the leading EWI system manufacturers in the UK, Wetherby Building Systems have a wide selection of approvals from the British Board of Agrément, KIWA and various European certification.

Watch our A1 Systems in Action

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Wetherby A1 System


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.

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    A selection of projects using a Wetherby A1 rated EWI system.

    Sheriffs Gate, Phase 1, Worcester

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    Gala House with Wetherby Direct Fix Stone Wool Insulation and Silicone Render

    Gala House, Nottingham

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    Mid Rise A1 EWI System

    Kingsway House, Warrington

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    Apollo Apartments, Bristol

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    Lovell Park High Rise A1 EWI System

    Lovell Park, Leeds

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