ASTM E2925-19a
(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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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 Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
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 Barriers to Trade (TBT) Committee.
Designation:E2925 −19a
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 C578 Specification for Rigid, Cellular Polystyrene Thermal
Insulation
1.1 This specification is applicable to manufactured poly-
C1338 Test Method for Determining Fungi Resistance of
meric materials used to provide a rainscreen function, a means
Insulation Materials and Facings
for the drainage of liquid moisture and the ventilation of vapor
D3045 Practice for Heat Aging of Plastics Without Load
moisture that enters an above-grade exterior wall assembly.
D5199 Test Method for Measuring the Nominal Thickness
Rainscreen materials that comply with this specification are
of Geosynthetics
intended to be used behind exterior cladding products and
D5322 Practice for Laboratory Immersion Procedures for
intended to cover onehundredpercent(100 %)ofthewallarea
Evaluating the Chemical Resistance of Geosynthetics to
that is designed to provide a rainscreen function to resist water
Liquids
infiltration.
D6108 Test Method for Compressive Properties of Plastic
1.2 This specification addresses the following types of
Lumber and Shapes
rainscreen materials:
D6364 Test Method for Determining Short-Term Compres-
1.2.1 Type A—entangled mesh materials.
sion Behavior of Geosynthetics
1.2.2 Type B—formed/textured sheet material.
E84 Test Method for Surface Burning Characteristics of
1.2.3 Type C—formed battens.
Building Materials
1.3 The values stated in SI units are to be regarded as E283/E283M Test Method for Determining Rate of Air
Leakage Through Exterior Windows, Curtain Walls, and
standard. No other units of measurement are included in this
standard. Doors Under Specified Pressure Differences Across the
Specimen
1.4 This standard does not purport to address all of the
E631 Terminology of Building Constructions
safety concerns, if any, associated with its use. It is the
E2273 Test Method for Determining the Drainage Efficiency
responsibility of the user of this standard to establish appro-
of Exterior Insulation and Finish Systems (EIFS) Clad
priate safety, health, and environmental practices and deter-
Wall Assemblies
mine the applicability of regulatory limitations prior to use.
G154 Practice for Operating Fluorescent Ultraviolet (UV)
1.5 This international standard was developed in accor-
Lamp Apparatus for Exposure of Nonmetallic Materials
dance with internationally recognized principles on standard-
3
2.2 Other Standard:
ization established in the Decision on Principles for the
CAN/CGSB 51.33-M89 Vapor Barrier Sheet, Excluding
Development of International Standards, Guides and Recom-
Polyethylene, for Use in Building Construction
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3. Terminology
2. Referenced Documents
3.1 Definitions—For definitions of general terms related to
2
building construction used in this specification, refer to Termi-
2.1 ASTM Standards:
nology E631.
3.2 Definitions of Terms Specific to This Standard:
1
This specification is under the jurisdiction of ASTM Committee E06 on
3.2.1 capillary action, v—liquid water movement against
Performance of Buildings and is the direct responsibility of Subcommittee E06.55
on Performance of Building Enclosures.
gravity induced by the force of molecular attraction (surface
Current edition approved Aug. 1, 2019. Published August 2019. Originally
tension) between the water and the material it contacts,
approved in 2014. Last previous edition approved in 2019 as E2925–19. DOI:
facilitated by a small gap between materials.
10.1520/E2925–19A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from Standards Council of Canada, 600-55 Metcalfe Street Ottawa,
the ASTM website. ON K1P 6L5, Canada, https://www.scc.ca/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2925−19a
3.2.2 exterior cladding, n—weather-exposed materials of a 6.5.1 The test specimens shall be exposed in accordance
wall assembly including
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2925 − 19 E2925 − 19a
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
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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 Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 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
E283E283/E283M 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
G154 Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
3
2.2 Other Standard:
CAN/CGSB 51.33-M89 Vapor Barrier Sheet, Excluding Polyethylene, for Use in Building Construction
1
This specification is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.55 on Performance
of Building Enclosures.
Current edition approved July 1, 2019Aug. 1, 2019. Published August 2019. Originally approved in 2014. Last previous edition approved in 20172019 as E2925–17.–19.
DOI: 10.1520/E2925–19.10.1520/E2925–19A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standards Council of Canada, 600-55 Metcalfe Street Ottawa, ON K1P 6L5, Canada, https://www.scc.ca/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E2925 − 19a
3. Terminology
3.1 Definitions—For definitions of general terms related to building construction used in this specification, refer to Terminology
E631.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 capillary action, v—liquid water movement against gravity induced by the force of molecular attraction (surface tension)
between the water and the material it contacts, facilitated by
...
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