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Building Supplement
Roofing Handbook Information Sheet
Standing seam sheeting was originally introduced to avoid the need for surface fixings which were often the cause of leakage and suitability for use at very low pitches was possibly not the main design criteria for the roof sheet. Very low roof pitches introduce more onerous service conditions for the roof sheeting system and these need to be assessed during design to avoid the risk of premature failure, in particular the risks of coating breakdown and condensation.
Updated edition of the Roofing handbook published by the Flat Roofing Contractors Advisory Board which was renamed Flat Roofing Alliance.
The Flat Roofing Alliance (FRA) was incorporated within The National Federation of Roofing Contractors (NFRC) in 2010. Previously, it has also been known as the Flat Roofing Contractors Advisory Board (FRCAB) and was the publisher of the Roofing Handbook.
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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