Fire Certification

Dryvit's extensive fire testing programme 

Alongside our A2-s1, d0 Roxsulation Pro System, Dryvit has carried out an extensive programme of fire testing to become one of the first external insulated render manufacturers to achieve BR 135 classification tested in accordance with BS 8414-1 and BS 8414-2 for a range of its External Wall Insulation (EWI) Systems. This testing continues to satisfy Building Regulations in England & Wales for fire safety when installed on defined non-domestic buildings over 18 metres in height. The BR 135 classification is called for as an alternative guidance to non-combustibility compliance for defined building types and applications.

Dryvit’s fire testing programme was carried out at the world-renowned Building Research Establishment (BRE) based in Watford and covers the Outsulation, Outsulation Plus and Outsulation Rail Systems over a range of insulation thicknesses, finishes, textures & colours over both solid and framed substrates.  This comprehensive programme of large-scale fire testing, coupled with on-going manufacturing surveillance and annual audit testing, will offer versatility of specification with ultimate assurance of compliance at all levels.  

The Outsulation, Outsulation Plus & Outsulation Rail Systems all provide proven weatherability and insulating qualities with the Outsulation Plus and Outsulation Rail System also adding a second line of defence against air, moisture and weather.  All systems can be fixed either mechanically or with adhesive to most substrates and are rendered with a polymer-modified reinforced base coat with a glass fibre mesh and can be finished with a wide choice of Dryvit’s standard and specialty coloured and textured finishes. For the test programme, stone wool firebreaks are positioned at each storey height, as recommended in the BRE report BR 135 Fire Performance of External Thermal Insulation for Walls of Multi-Storey Buildings. For information on the systems please refer to system options.