ASTM E2556/E2556M
Standard Specification for Vapor Permeable Flexible Sheet Water-Resistive Barriers Intended for Mechanical Attachment
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About This Item
ASTM E2556/E2556M is the ASTM standard for vapor permeable flexible sheet water-resistive barriers intended for mechanical attachment. It provides a technical reference for products used to help manage moisture in wall assemblies while still allowing vapor permeability. For manufacturers, specifiers, and buyers, this standard matters because it helps align product expectations, support comparison across materials, and improve confidence in quality control and procurement decisions for building enclosure applications.
Purpose of ASTM E2556/E2556M
The purpose of ASTM E2556/E2556M is to define a specification framework for flexible sheet water-resistive barriers that are attached mechanically and are intended to remain vapor permeable. As a product standard, it is commonly used to guide how these materials are identified, evaluated, and compared for building use. ASTM E2556/E2556M helps create a consistent technical basis for assessing whether a barrier is suitable for its intended role in wall assemblies and related construction applications.
Common use cases of ASTM E2556/E2556M
ASTM E2556/E2556M is commonly referenced when selecting or supplying sheet water-resistive barrier materials for mechanically attached building envelope systems. It is relevant to products used behind exterior cladding or other wall components where moisture management and vapor permeability are important. The standard may also support product specification, submittal review, and quality verification for manufacturers, distributors, and construction teams that need a clear benchmark for flexible WRB sheets.
Why ASTM E2556/E2556M matters
ASTM E2556/E2556M matters because it gives projects and product teams a consistent way to evaluate a specific class of water-resistive barrier materials. That consistency supports compliance efforts, reduces ambiguity in purchasing, and helps with product comparison during testing or specification review. For building professionals, using ASTM E2556/E2556M can also lower the risk of selecting a material that does not match the intended mechanical attachment method or vapor-permeable performance expectations.
- Flexible sheet water-resistive barriers
- Mechanically attached applications
- Vapor permeable wall materials
- Product specification and review
- Quality control and compliance support
- Publication Date: 2022-10-06
- Publisher: ASTM
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