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Ariel Plastics Ltd. Harcon GRP valley trough and flashing range. Harcon GRP secret gutter type C and dry fix joining gutter DBG. Product sheet 3

Certificate 89/2153

Ariel Plastics Ltd. Harcon GRP valley trough and flashing range. Harcon GRP secret gutter type C and dry fix joining gutter DBG. Product sheet 3

Document Status

Withdrawn, Document not available for download


Core Supplement




Relates to guttering products for use as a seal at the junction of slated or tiled roofs on terraced, semi-detached or extended houses. Key factors assessed were weathertightness, properties in relation to fire, strength and durability.


Superseded by the fourth issue, dated 24th May 2019. Date of third issue: 7th September 2016 (amended 21st February 2017). Originally certificated on 2nd February 1989.


Publisher History

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.

IHS Markit

IHS Markit is a leading global source of critical information and insight for customers in a broad range of industries. Our customer product and service solutions span four major areas of information: energy, product lifecycle management, environmental and security. By focusing on our customers first, we deliver data and expertise that enable innovative and successful decision-making. Customers range from governments and multinational companies to smaller companies and technical professionals in more than 180 countries. IHS has been in business since 1959 and employs more than 3,500 people in 35 locations around the world.

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