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FIRE SAFETY FIRE PERFORMANCE OF GREEN, BLUE AND BIOSOLAR ROOFS By Mark Harris, Head of Technical and Operations at Radmat Building Products, and Chair of GRO. The Building Regulations set the Statutory (legal) minimum requirements for the construction of buildings in the United Kingdom, establishing minimum performance requirements to prevent the loss of life. In England, Wales and Northern Ireland, the Approved Documents provide guidance on how to comply with these legal requirements, providing individual documents for Structure, Fire Safety, Fall Protection, Access and Use, Thermal performance, Overheating, Glazing, Electrical safety, Site Preparation, Toxic Substances, Ventilation, Sanitation, Drainage and Heat & Fuel, as well as the passage of sound. In Scotland this guidance is provided through Technical Handbooks. Following the tragedy of the Grenfell Tower fire on 14th June 2017, the Building Regulations have seen extensive review and update, particularly with regards to the fire performance of external walls on buildings over 18m (11m in Scotland) that contain dwellings, with a requirement for the external walls to be constructed of materials that are either ‘non-combustible’ or ‘very limited combustibility’ (fire class A1 or A2 to BS EN 13501-1). The same rules apply to balconies on such buildings. The fire performance requirement for roofs has not changed since the introduction of classifications to BS EN 13501-5 into the Approved Document B in 2006, classifications that relate to the BS 476-3 classifications that have been in the Approved Document since it was introduced in 1965. To achieve a fire performance classification to either BS EN 13501-5 or BS 476-3, testing of a roof construction has to be carried out to ENV 1187 by an approved fire testing facility. The resulting classification report is specific to the exact construction tested, so, for example, if you carry out a test that contains 50mm of PIR insulation, that test is not relevant to 150mm of PIR Continued on page 16 >>> Inset Mark Harris, Head of Technical and Operations at Radmat Building Products. Main image: BioSolar installation by Radmat in London. 14 GREENSCAPE SUMMER 2022 • www.greenscapemag.co.uk
Liquid Roofing & Waterproofing KEMPEROL ® The first choice for liquid membranes Long term protection for flat roofs, buildings and critical structures Warm roofs, inverted roofs, green roofs, podium Whatever your requirements, we have a certified and proven solution to meet your needs. Kemperol Liquid Waterproofing Contact us to discuss With over 60 years’ experience, there’s not many challenges we haven’t faced, confronted and overcome. Whatever the building, KEMPEROL ® has a range of cold applied, root and rot resistant products to suit every green roof application. visit www.kemperol.co.uk To find out more about the KEMPEROL ® range of products Tel: 01925 445532 Email: enquiries@kempersystem.co.uk 06/4388 95/3139
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