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Alderburgh Ltd. Alderburgh gas-resistant membrane. Alderprufe GRA gas barrier. Product sheet 1

Certificate 16/5368

Alderburgh Ltd. Alderburgh gas-resistant membrane. Alderprufe GRA gas barrier. Product sheet 1

Document Status

Withdrawn, Document not available for download


Core Supplement




Relates to a low-density polythene gas barrier and damp-proof membrane for concrete ground floors not subject to hydrostatic pressure to protect the building from moisture, radon, methane and carbon dioxide. Key factors assessed were resistance to water and water vapour, resistance to underground gases and puncture, and durability.


Superseded by the March 2019 amendment. Date of second issue: 9th January 2019. Originally certificated on 11th January 2017.


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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