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ASTM E2925-14

(Specification)

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

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

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.
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.

General Information

Status
Historical
Publication Date
31-May-2014
ICS
91.060.10 - Walls. Partitions. Facades
Technical Committee
E06 - Performance of Buildings
Drafting Committee
E06.55 - Performance of Building Enclosures
Current Stage
Ref Project

Relations

Replaced By
ASTM E2925-17 - Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function
Effective Date
01-Jun-2017

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ASTM E2925-14 - Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen FunctionASTM E2925-14 - Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function
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ASTM E2925-14 - Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E2925 −14
Standard Specification for
Manufactured Polymeric Drainage and Ventilation Materials
1
Used to Provide a Rainscreen Function
This standard is issued under the fixed designation E2925; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D5322 Practice for Laboratory Immersion Procedures for
Evaluating the Chemical Resistance of Geosynthetics to
1.1 This specification is applicable to manufactured poly-
Liquids
meric materials used to provide a rainscreen function, a means
D6108 Test Method for Compressive Properties of Plastic
for the drainage of liquid moisture and the ventilation of vapor
Lumber and Shapes
moisture that enters an above-grade exterior wall assembly.
D6364 Test Method for Determining Short-Term Compres-
Rainscreen materials that comply with this specification are
sion Behavior of Geosynthetics
intended to be used behind exterior cladding products and
E84 Test Method for Surface Burning Characteristics of
intendedtocoveronehundredpercent(100 %)ofthewallarea
Building Materials
that is designed to provide a rainscreen function to resist water
E283 Test Method for Determining Rate of Air Leakage
infiltration.
Through Exterior Windows, Curtain Walls, and Doors
1.2 This specification addresses the following types of
Under Specified Pressure Differences Across the Speci-
rainscreen materials:
men
1.2.1 Type A—entangled mesh materials.
E631 Terminology of Building Constructions
1.2.2 Type B—formed/textured sheet material.
E2273 Test Method for Determining the Drainage Efficiency
1.2.3 Type C—formed battens.
of Exterior Insulation and Finish Systems (EIFS) Clad
1.3 The values stated in SI units are to be regarded as Wall Assemblies
E2556/E2556M Specification for Vapor Permeable Flexible
standard. No other units of measurement are included in this
standard. Sheet Water-Resistive Barriers Intended for Mechanical
Attachment
1.4 This standard does not purport to address all of the
G154 Practice for Operating Fluorescent Ultraviolet (UV)
safety concerns, if any, associated with its use. It is the
Lamp Apparatus for Exposure of Nonmetallic Materials
responsibility of the user of this standard to establish appro-
3
2.2 Other Standard:
priate safety and health practices and determine the applica-
CAN/CGSB 51.33-M89 Vapor Barrier Sheet, Excluding
bility of regulatory limitations prior to use.
Polyethylene, for Use in Building Construction
2. Referenced Documents
3. Terminology
2
2.1 ASTM Standards:
3.1 Definitions—For definitions of general terms related to
C578 Specification for Rigid, Cellular Polystyrene Thermal
building construction used in this specification, refer to Termi-
Insulation
nology E631.
C1338 Test Method for Determining Fungi Resistance of
3.2 Definitions of Terms Specific to This Standard:
Insulation Materials and Facings
3.2.1 capillary action, v—liquid water movement against
D3045 Practice for Heat Aging of Plastics Without Load
gravity induced by the force of molecular attraction (surface
D5199 Test Method for Measuring the Nominal Thickness
tension) between the water and the material it contacts,
of Geosynthetics
facilitated by a small gap between materials.
3.2.2 exterior cladding, n—weather-exposed materials of a
1
This specification is under the jurisdiction of ASTM Committee E06 on
wall assembly including but not limited to siding, stucco,
Performance of Buildings and is the direct responsibility of Subcommittee E06.55
on Performance of Building Enclosures.
masonry veneer, but excluding fenestration (doors and win-
Current edition approved June 1, 2014. Published June 2014. DOI: 10.1520/
dows).
E2925–14
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Canadian General Standards Board, Place du Portage III, 6B1,
Standards volume information, refer to the standard’s Document Summary page on 11 Laurier Street, Gatineau, Quebec K1A 1G6 Canada, http://www.tpsgc-
the ASTM website. pwgsc.gc.ca/ongc-cgsb.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2925−14
3.2.3 mortar screen, n—layer of material designed to pre- 6.6.1 The test specimens shall be heat aged in accordance
vent mortar from entering the drainage space. with Practice D3045 at a temperature of (77 6 3)°C for 90
days.
3.2.4 polymeric, n—materials composed primarily of poly-
6.6.2 After the heat aging test has been completed, the
mers.
thickness test (6.3) and the c
...

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5.1 This test method is a standard procedure for determining the resistance to water penetration under uniform static air pressure differences. The air-pressure differences acting across a building envelope vary greatly. These factors should be fully considered prior to specifying the test pressure difference to be used.
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Section  
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Concentrated Load  
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4.1 This guide is intended to provide building professionals with a comprehensive methodology for evaluating water leakage through walls. It addresses the performance expectations and service history of a wall, the various components of a wall, and the interaction between these components and adjacent construction. It is not intended as a construction quality control procedure, nor as a preconstruction qualification procedure. It is intended for evaluating buildings that exhibit water leakage.  
4.1.1 Qualifications—This guide requires the evaluator to possess a knowledge of basic physics and of construction and wall design principles and practices.  
4.1.2 Application—The sequential activities described herein are intended to produce a complete and comprehensive evaluation program, but all activities may not be applicable or necessary for a particular evaluation program. It is the responsibility of the professional using this guide to determine the activities and sequence necessary to properly perform an appropriate leakage evaluation for a specific building.  
4.1.3 Preliminary Assessment—A preliminary assessment may indicate that water leakage problems are limited to a specific element or portion of a wall. The preliminary assessment may also indicate that the wall is not the source of a leak even though it is perceived as such by the building occupant. The presence of water might result from a roofing problem, a condensation problem, a plumbing problem, operable windows or doors left opened or unlatched or some other condition not directly related to water leakage through the building wall and is outside the scope of this guide. The evaluation of causes may likewise be limited in scope, and the procedures recommended herein abridged according to the professional judgement of the evaluator. A statement stipulating the limits of the investigation should be included in the report.  
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1.3.1 Exception—Solely inch-pound units are stated in 10.3.1, 10.3.2.1, X1.5.3.7, X2.5.1.3, X3.4.3.3, X5.1.2.2, X5.5.5, X5.6.3, and X8.5.1.3.  
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4.2 This guide does not establish specific roles for the parties involved during construction or the contractual obligations of those parties. The role of each party within any specific project should be established and documented before the start of the project.  
4.3 This guide is intended for use when specifying construction mockups that are either integrated mockups or off-structure mockups.  
4.4 This guide is intended to aid the specifier in the development of a QA mockup program for assessing the performance of exterior walls. It is not intended to provide a comprehensive list of applicable test methods for QA testing available or applicable to a mockup program.  
4.5 This guide does not address preconstruction laboratory testing of a wall system.  
4.6 This guide is intended to address technical issues with the performance of the wall system and the interconnection of the various components and systems. A mockup may or may not be used as an aesthetic mockup; however, this guide is not intended to address aesthetic issues with the wall system.  
4.7 This guide is not intended to provide guidance for construction observation services. However, the mockup may be useful to inform inspectors of the intended construction, sequence, materials, and interface conditions encountered on the project and serve as a standard of quality to which the remainder of construction can be compared.
SCOPE
1.1 This guide provides information to assist in the specification, design, and performance testing of field-constructed exterior wall assemblies (“mockups”) for construction projects. This includes testing procedures appropriate to evaluate the component and assembly performance for water penetration resistance, air leakage resistance, and other test methods that may be applied as part of the quality assurance (QA) program for the installed systems.  
1.2 This guide is intended to be applied to exterior wall mockups that include components, systems, and assemblies including, but not limited to, curtain walls, windows, doors, masonry walls, precast concrete, cast-in-place concrete, exterior insulation and finish system (EIFS), roofing interfaces, stucco, wood siding, metal panels, sealants, appurtenances, penetrations, louvers, and combinations thereof. Such mockups are expected to include the intersection between wall systems.  
1.3 This guide is not intended to provide a comprehensive list of potential testing that may be applicable to field-constructed mockups. Additional tests may be applicable to mockups for specific projects.  
1.4 This guide is not intended to address all possible project delivery methods and as such the requirements listed herein must be evaluated by the specifier for appropriateness with the delivery method.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical...

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