Current
Building Supplement
Guidance Document
Calculations for gutter specifications based on the requirements of BS EN 12056-3:2000 illustrated with a design flow chart to determine roof length draining, catchment area and gutter flow capacity.
December 2018 edition. Supersedes the August 2017 amendment. First published May 2017, as MGMA gutter design flow chart.
Formed in 1994, the Metal Gutter Manufacturers Association represents UK manufacturers of metal gutters.
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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