ASTM E2788/E2788M
Standard Specification for Use of Expanded Shale, Clay, and Slate (ESCS) as a Mineral Component in the Growing Media and the Drainage Layer for Vegetative (Green) Roof Systems
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About This Item
ASTM E2788/E2788M is the ASTM standard that addresses the use of expanded shale, clay, and slate (ESCS) as a mineral component in growing media and as a drainage layer for vegetative green roof systems. It provides a technical basis for specifying these lightweight mineral materials in rooftop applications where plant support and water management both matter. For procurement, design, and quality review, this standard helps align material selection with a recognized specification framework.
Overview of ASTM E2788/E2788M
This specification focuses on ESCS materials used in green roof assemblies, where a mineral component may be blended into growing media or installed as part of the drainage layer. ASTM E2788/E2788M is relevant when projects need a consistent reference for evaluating material suitability and documenting compliance. As a standards document, it supports clearer communication between specifiers, suppliers, and contractors by defining the intended use of expanded shale, clay, and slate in vegetative roof systems.
Common use cases of ASTM E2788/E2788M
The standard is commonly used in vegetative roof design and material specification, especially where lightweight mineral aggregates are needed to support plant growth conditions and drainage performance. ASTM E2788/E2788M may be referenced during submittal review, procurement, and product evaluation for green roof assemblies. It is also useful for comparing ESCS-based products intended for growing media blends or drainage layers, helping project teams select materials that fit the intended roof system application.
Benefits of using ASTM E2788/E2788M
Using ASTM E2788/E2788M can improve consistency in specifying ESCS materials for green roof projects and reduce ambiguity during purchasing and review. It gives owners, designers, and suppliers a shared technical reference for product evaluation and quality control. The standard may also support compliance efforts by providing a recognized basis for documenting material use, which can help reduce risk when selecting components for growing media and drainage layers in vegetative roof systems.
- Expanded shale, clay, and slate reference
- Growing media mineral component
- Vegetative roof drainage layer use
- Specification and procurement support
- Material consistency and review
- Publication Date: 2024-01-19
- Publisher: ASTM
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