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Specification for performance parameters and test methods for green roof substrates
This British Standard specifies requirements for the testing of substrates (the growing medium) for constructed green roofs intended to provide long term support for specified plant communities. This includes extensive and intensive green roof substrates.
This British Standard provides methodologies for testing green roof substrates covering the complete application range, and recommended specifications for physical and chemical characteristics considered to be optimal for extensive substrates.
This British Standard only addresses methods and parameters to ensure that the substrate used does not become a limiting factor for successful green roof installation. It does not address the wider range of other design considerations, such as the supporting structure, construction, planting options or post-build maintenance.
It is recognized that there are green roof systems that do not incorporate a substrate layer and these are not covered in this British Standard.
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