Current
Core Supplement
Certificate
Relates to reinforced PVC, fully-bonded waterproof coverings for use on limited-access roofs in exposed, loose-laid and ballasted, protected, roof garden and green roof specifications. Key factors assessed were weathertightness; behaviour in relation to fire; resistance to wind uplift, mechanical damage and root penetration; and durability.
Fifth issue, dated 15th June 2020. Supersedes the fourth issue, dated 11th July 2014. Originally certificated on 10th June 2004.
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.