The GRO Green Roof Code - SIG Design and Technology

Contents
1 Introduction to the Code
1.1 Scope
1.2 Who is this guidance for?
1.3 Steering Group
1.4 Code review procedures
1.5 Acknowledgements
2 Introduction to green roofs
2.1 Definition
2.2 Types
2.2.1 Extensive green roof
2.2.2 Biodiverse roof
2.2.3 Semi Intensive green roof
2.2.4 Intensive green roof
2.3 Benefits
2.3.1 Sustainable Drainage
2.3.2 Biodiversity
2.3.3 Countering Climate Change & the Urban Heat Island
2.3.4 Building Performance Enhancements
2.3.5 Amenity & Health & wellbeing
2.3.6 Financial
3 Design Considerations & Practical Implications
3.1 Configuration of a Green Roof
3.1.1 Root resistant material
3.1.2 Moisture retention/protection layer
3.1.3 Drainage/Reservoir layer
3.1.4 Filter layer
3.1.5 Growing medium
3.1.6 Vegetation
3.2 Structural Design
3.2.1 Wind
3.2.2 Dead Loads
3.2.3 Shear Forces
3.3 Waterproofing
3.4 Drainage
3.5 Fire
3.5.1 Extensive Roofs
3.5.2 Intensive Roofs
3.6 Irrigation
3.7 Safety & Access
3.7.1 Extensive and biodiverse roofs
3.7.2 Intensive and semi-intensive roofs
4 Green Roof Installations
4.1 Site Preparation & Planning
4.2 Installation of System Components
4.2.1 Protection sheets, drainage layers and filter sheets
4.2.2 Substrate Installation
4.2.3 Plant Layer Installation
4.3 Installation of Perimeter & Penetration Details
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