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    ASTM E2925 - 14

    Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function

    Active Standard ASTM E2925 | Developed by Subcommittee: E06.55

    Book of Standards Volume: 04.12


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    Abstract

    This specification covers the requirements and corresponding test methods for manufactured polymeric materials used to provide a rainscreen function, a means for the drainage of liquid moisture and the ventilation of vapor moisture that enters an above-grade exterior wall assembly. Rainscreen materials that conform to this specification are intended to be used behind exterior cladding products and to cover the entire wall area that is designed to provide a rainscreen function to resist water infiltration. Three types of rainscreen materials are addressed: Type A (entangled mesh materials), Type B (formed/textured sheet material), and Type C (formed battens). This specification also covers descriptions of the materials and material composition; material properties and material performance requirements; specimen preparation; reporting requirements; marking and labeling; and packaging and package marking. A table presents the requirements for ventilation/airflow, drainage, thickness, compression, strength, UV exposure, heat aging, mold/fungal growth, and water exposure.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification is applicable to manufactured polymeric materials used to provide a rainscreen function, a means for the drainage of liquid moisture and the ventilation of vapor moisture that enters an above-grade exterior wall assembly. Rainscreen materials that comply with this specification are intended to be used behind exterior cladding products and intended to cover one hundred percent (100 %) of the wall area that is designed to provide a rainscreen function to resist water infiltration.

    1.2 This specification addresses the following types of rainscreen materials:

    1.2.1 Type A—entangled mesh materials.

    1.2.2 Type B—formed/textured sheet material.

    1.2.3 Type C—formed battens.

    1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C578 Specification for Rigid, Cellular Polystyrene Thermal Insulation

    C1338 Test Method for Determining Fungi Resistance of Insulation Materials and Facings

    D3045 Practice for Heat Aging of Plastics Without Load

    D5199 Test Method for Measuring the Nominal Thickness of Geosynthetics

    D5322 Practice for Laboratory Immersion Procedures for Evaluating the Chemical Resistance of Geosynthetics to Liquids

    D6108 Test Method for Compressive Properties of Plastic Lumber and Shapes

    D6364 Test Method for Determining Short-Term Compression Behavior of Geosynthetics

    E84 Test Method for Surface Burning Characteristics of Building Materials

    E283 Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

    E631 Terminology of Building Constructions

    E2273 Test Method for Determining the Drainage Efficiency of Exterior Insulation and Finish Systems (EIFS) Clad Wall Assemblies

    E2556/E2556M Specification for Vapor Permeable Flexible Sheet Water-Resistive Barriers Intended for Mechanical Attachment

    G154 Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials

    Other Standard

    CAN/CGSB 51.33-M89 Vapor Barrier Sheet, Excluding Polyethylene, for Use in Building Construction


    ICS Code

    ICS Number Code 91.060.10 (Walls. Partitions. Facades)

    Referencing This Standard

    DOI: 10.1520/E2925-14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM E2925-14, Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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