ASTM E2321-03(2011)
(Practice)Standard Practice for Use of Test Methods for Determining the Water Vapor Transmission (WVT) of Exterior Insulation and Finish Systems (EIFS)
Standard Practice for Use of Test Methods <astmref rid="a00002"> for Determining the Water Vapor Transmission (WVT) of Exterior Insulation and Finish Systems (EIFS)
SIGNIFICANCE AND USE
The purpose of this test is to obtain steady state values of water vapor transfer through the EIFS sample. This characteristic of EIFS is commonly requested by regulatory and design organizations, and is used in thermal and moisture studies of building walls. The degree to which an EIFS allows water vapor to pass through it can affect the performance of an EIFS wall assembly.
A permeance value obtained under one set of test conditions does not indicate the value under a different set of conditions. For this reason, the test conditions selected are those that most closely approach the conditions of use for EIFS components and assemblies.
This standard should not be used alone as the sole means for evaluating the water vapor transmission characteristics of a given EIFS wall assembly. Other methods are available, and should be considered and used as appropriate.
To be meaningful in evaluating the thermal and moisture condition of a given EIFS wall assembly, the specimens used in this standard should represent closely the materials that actually exist, or will exist, on a given building.
SCOPE
1.1 This standard describes how to use Test Methods E96/E96M to determine the water vapor transmission (WVT) characteristics of an EIFS sample.
1.2 An Exterior Insulation and Finish System (EIFS) is a multilayer exterior building wall material that consists of a number of layers. For the purpose of this standard, these layers, whether they be individual EIFS component materials in single layers, or groups of EIFS component materials, are called the “EIFS sample.”
1.3 The Water Method, Procedures B and D described in section X1.1.2 and X1.1.5 of Appendix X1 of Test Methods E96/E96M shall be used in this standard.
1.4 This standard is limited to specimens not over 1¼ in. (32 mm) in thickness, except as provided in Section 9 of this standard.
1.5 The values stated in inch-pound units are to be regarded as the standard. Metric inch-pound conversion factors for water vapor transmission, permeance, and permeability are stated in Table 1 of Test Methods E96/E96M. All conversions of mm Hg to Pa are made at a temperature of 0°C.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: E2321 − 03 (Reapproved 2011)
Standard Practice for
Use of Test Methods E96/E96M for Determining the Water
Vapor Transmission (WVT) of Exterior Insulation and Finish
Systems (EIFS)
This standard is issued under the fixed designation E2321; 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 E96/E96M Test Methods for Water Vapor Transmission of
Materials
1.1 This standard describes how to use Test Methods
E631 Terminology of Building Constructions
E96/E96M to determine the water vapor transmission (WVT)
E2110 Terminology for Exterior Insulation and Finish Sys-
characteristics of an EIFS sample.
tems (EIFS)
1.2 An Exterior Insulation and Finish System (EIFS) is a
multilayer exterior building wall material that consists of a
3. Terminology
numberoflayers.Forthepurposeofthisstandard,theselayers,
3.1 For definitions of general terms relating to:
whether they be individual EIFS component materials in single
3.1.1 Water vapor transmission of materials, see Test Meth-
layers, or groups of EIFS component materials, are called the
ods E96/E96M.
“EIFS sample.”
3.1.2 Building construction, see Terminology E631.
1.3 The Water Method, Procedures B and D described in 3.1.3 EIFS, see Terminology E2110.
section X1.1.2 and X1.1.5 of Appendix X1 of Test Methods
4. Summary of Practice
E96/E96M shall be used in this standard.
1 4.1 This standard describes how to determine the water
1.4 This standard is limited to specimens not over 1 ⁄4 in.
vaportransmission(WVT)oftheEIFSsample,usingtheWater
(32 mm) in thickness, except as provided in Section 9 of this
Method, Procedures B and D, of Test Methods E96/E96M.In
standard.
the Water Method, the dish or tray contains distilled water, and
1.5 The values stated in inch-pound units are to be regarded
the water vapor passes through the test specimen from the
asthestandard.Metricinch-poundconversionfactorsforwater
inside of the dish to the chamber is which the specimen is
vapor transmission, permeance, and permeability are stated in
contained. Eventually the rate of vapor flow stabilizes, and by
Table1ofTestMethodsE96/E96M.AllconversionsofmmHg
weighting the change in weight over time, the water vapor
to Pa are made at a temperature of 0°C.
transmission of the EIFS sample can be calculated.
1.6 This standard does not purport to address all of the
4.1.1 For both Procedures, three specimens shall be used.
safety concerns, if any, associated with its use. It is the
4.1.1.1 Procedure B shall be used for specimens that in
responsibility of the user of this standard to establish appro-
actual use on a building would have the higher humidity on the
priate safety and health practices and determine the applica-
indoor side of the wall.
bility of regulatory limitations prior to use.
4.1.1.2 Procedure D shall be used, for specimens that in
actual use on a building would have the higher humidity on the
2. Referenced Documents
outdoor side of the wall.
2.1 ASTM Standards:
5. Significance and Use
5.1 The purpose of this test is to obtain steady state values
of water vapor transfer through the EIFS sample. This charac-
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
teristic of EIFS is commonly requested by regulatory and
mance of Buildings and is the direct responsibility of Subcommittee E06.58 on
Exterior Insulation and Finish Systems (EIFS).
design organizations, and is used in thermal and moisture
Current edition approved Nov. 15, 2011. Published December 2011. Originally
studies of building walls. The degree to which an EIFS allows
approved in 2003. Last previous edition approved in 2003 as E2321 – 03. DOI:
water vapor to pass through it can affect the performance of an
10.1520/E2321-03R11.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or EIFS wall assembly.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 A permeance value obtained under one set of test
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. conditions does not indicate the value under a different set of
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E2321 − 03 (2011)
conditions. For this reason, the test conditions selected are 9.1.3 All specimens shall have their thickness measured in
those that most closely approach the conditions of use for EIFS accordance with 14.1.1 of Test Methods E96/E96M.
components and assemblies.
10. Attachment of Specimen to Test Dish
5.3 Thisstandardshouldnotbeusedaloneasthesolemeans
10.1 Test specimens for EIFS components or assemblies
for evaluating the water vapor transmission characteristics of a
shall be attached to the test dish by sealing as specified in Test
given EIFS wall assembly. Other methods are available, and
Methods E96/E96M, Section 10. (Warning—The sealant
should be considered and used as appropriate.
around the edge of the specimen in the pan or dish, must not be
5.4 Tobemeaningfulinevaluatingthethermalandmoisture
absorbed into porous material, if any, contained in the speci-
conditionofagivenEIFSwallassembly,thespecimensusedin
men itself.)
this standard should represent closely the materials that actu-
ally exist, or will exist, on a given building.
11. Test Pr
...
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