BS 8616:2019 Specification for performance parameters and test methods for green roof substrates

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BS 8616:2019

Specification for performance parameters and test methods for green roof substrates

Status : Current   Published : August 2019

Format
PDF

Format
HARDCOPY



What is this standard about?

A green roof is typically understood to be an intentionally vegetated roof or platform disconnected from the underlying ground. Substrate is a key component of any green roof and directly contributes to its success. The suitability of a green roof substrate can be assessed by measuring key performance parameters.

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. It  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. It addresses methods and parameters to ensure that the substrate used does not become a limiting factor for the successful installation of a green roof. 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.

Who is this standard for?

  • Green roof contractors,
  • Suppliers, installers and product manufacturers of green roofs ,
  • landscape architects,
  • general architects,
  • structural engineers,
  • soil testing laboratories,
  • ecology/environmental consultancy companies who wish to investigate sub-standard green roof
  • consultants and regulators such as the local authority
  • landscape colleges for students/educational purposes
  • Universities,

Why should you use this standard?

It provides:

  • methodologies for sampling substrates (for both intensive and extensive blends)
  • Method of test for determination of the particle size distribution and organic matter content, as loss on ignition (LOI), of green roof substrates
  • Method of test to determine the physical properties of green roof substrates: oven dry bulk density, bulk density at field capacity, hydraulic conductivity, field capacity, particle density and porosity
  • Method of test for the analysis of green roof substrate pH
  • Method of test for the determination of electrical conductivity in a calcium sulphate solution extract of green roof substrate
  • Method of test for the determination of green roof substrate nitrogen content and C:N ratio
  • Method of test for the analysis of green roof substrate potassium extractable by 0.5 M acetic acid solution
  • Method of test for the analysis of green roof substrate phosphate-P extractable by 0.5 M acetic acid solution
  • Method of test for the analysis of green roof potential phytotoxins: copper, zinc, nickel, lead and cadmium, extractable by 0.05 M EDTA using atomic absorption spectrophotometry
  • Method of test for the identification of foreign objects within a green roof substrate sample
  • Information about Substrate sampling and categories
  • Methods for obtain substrate samples
  • Methods to determine physical properties of the substrate including bulk density (over dried and field capacity), particle size distribution, porosity, particle density, organic matter content and satuarted hydraluic conductivity
  • Methods to determine chemcial properties of the substrate including pH, electrical conductivity, total nitrogen, C:N ratio, plant availble phosphate and potassium, and indictor phtyotoxic elelements (nickle, lead, copper, zinc and cadmium)
  • Method to determine indentification of foreign objects
  • Reference values for the above characteristics for extensive green roof subsrates.



Standard NumberBS 8616:2019
TitleSpecification for performance parameters and test methods for green roof substrates
StatusCurrent
Publication Date23 August 2019
Cross ReferencesBS EN 932-1:1997, BS EN 13055:2016, BS 3882:2015, PAS 100
Draft Superseded By19/30374878 DC
DescriptorsPlant habitats, Specifications, Substrates (insulating), Roofing, Test methods
ICS65.020.20
91.060.20
91.100.50
CommitteeAW/20/-/7
ISBN978 0 539 00312 3
PublisherBSI
FormatA4
DeliveryYes
Pages30
File Size916 KB
Price£176.00


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