Current
Core Supplement
Certificate
Relates to waterproof coverings for use on limited access flat/pitched roofs in mechanically fastened, loose-laid and ballasted, protected, roof garden and blue roof specifications. Key factors assessed were weathertightness; behaviour in relation to fire; resistance to wind uplift, foot traffic and penetration by roots; and durability.
Fifth issue, dated 15th June 2020. Supersedes the fourth issue, dated 8th June 2012. Originally certificated on 28th May 2002.
The British Board of Agrément have been providing authoritative and independent information on the performance of building products for over 40 years. The certificates they produce contain data on durability, installation and compliance with Building Regulations.
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.