ASTM E2398/E2398M
Standard Test Method for Water Capture and Media Retention of Geocomposite Drain Layers for Vegetative (Green) Roof Systems
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About This Item
ASTM E2398/E2398M is the ASTM standard for evaluating the water capture and media retention of geocomposite drain layers used in vegetative green roof systems. It provides a focused test method for assessing how these drainage layers interact with growing media, which is important for product comparison, design decisions, and quality control. For manufacturers, specifiers, and purchasers, ASTM E2398/E2398M supports more consistent evaluation of materials intended for green roof performance.
Overview of ASTM E2398/E2398M
The official title, Standard Test Method for Water Capture and Media Retention of Geocomposite Drain Layers for Vegetative (Green) Roof Systems, shows that this document is centered on test-based assessment of drainage layers used in rooftop planting assemblies. It is intended to help characterize how a geocomposite drain layer handles water and retains media in a controlled evaluation setting. As an ASTM standard, it is commonly used to support technical review, product qualification, and more consistent comparison of materials for green roof applications.
Common use cases of ASTM E2398/E2398M
This standard is commonly referenced when evaluating geocomposite drain layers for vegetative roof assemblies, especially during product development, specification writing, or procurement review. It may be used by laboratories, manufacturers, designers, and testing teams that need a shared method for checking drainage-layer behavior with respect to water capture and media retention. ASTM E2398/E2398M is also useful when comparing products intended for green roof systems under similar test conditions.
Benefits of using ASTM E2398/E2398M
Using ASTM E2398/E2398M helps create a more consistent basis for testing and product evaluation, which can improve reliability in purchasing and specification workflows. It supports clearer communication between suppliers, labs, and design professionals by grounding performance discussion in a recognized ASTM standard. The method can also reduce uncertainty when comparing geocomposite drain layers, helping teams make more informed decisions about materials used in green roof systems and overall project quality control.
- Water capture evaluation
- Media retention assessment
- Geocomposite drain layers
- Green roof systems
- Testing and comparison
- Publication Date: 2019-03-07
- Publisher: ASTM
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