Current
Core Supplement
Certificate
Relates to outward opening tilt and turn window systems, chamfered and ovolo, in white, cream and woodgrain finish, for use in replacement and new build applications. Key factors assessed were thermal properties, weathertightness, ventilation, unauthorised access and durability.
Fourth issue, dated 24th February 2021. Supersedes the third issue, dated 16th March 2018. Originally certificated on 14th April 2010.
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.
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