What is BS 8616 about?
BS 8616 is a British standard on green roof substrates which explains specification for its performance parameters and test methods.
BS 8616 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.
BS 8616 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.
Note: BS 8616 does not address the wider range of other design considerations, such as the supporting structure, construction, planting options, or post-build maintenance.
Who is BS 8616 for?
BS 8616 on performance parameters and test methods for green roof substrates is useful for: 
- Green roof contractors
- Suppliers, installers and product manufacturers of green roofs
- Landscape architects
- General architects
- Structural engineers
- Soil testing laboratories
Why should you use BS 8616?
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. Green roof substrates are typically a combination of organic and inorganic materials. Organic materials are usually kept to a maximum of 20%.
A green roof has many benefits at economic, ecological and societal levels. A green roof provides a rainwater buffer, purifies the air, reduces the ambient temperature, regulates the indoor temperature, saves energy and encourages biodiversity in the city. Green roofs are part of climate-proof construction. What's more, people are happier in a green environment than in grey surroundings. Below we explain the benefits one by one.
With BS 8616 providing you specifications for performance parameters and test methods for green roof substrates it becomes very easy for you to achieve the above-mentioned benefits.
