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    BS 7412

    Specialist Building Products Limited
    T/A Sierra Windows
    Alders Way
    Paignton
    Yalberton Industrial Estate
    TQ4 7QE
    United Kingdom
    BSI logo

    Certificate Number: KM 12887
    Scope: Plastics windows made from PVC-U extruded hollow profiles

    Original Registration Date Effective Date Last Revision Date Expiry Date
    1991-10-23 2024-12-10 2024-12-10 2027-09-04