ASTM E1646-95(2018)
(Test Method)Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference
Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference
SIGNIFICANCE AND USE
5.1 This test method is a standard procedure for determining the resistance to water penetration under uniform positive static air pressure differences, and simulates wind driven rain imposed on sidelaps and rain that is free to drain while building a water head as it flows. The slope of the roof is significant. These factors shall be fully considered prior to specifying the test pressure difference.
Note 1: In applying the results of tests by this method, note that the performance of a roof or its components, or both, may be a function of proper installation and adjustment. In service, the performance also depends on the rigidity of supporting construction, roof slope, and on the resistance of components to deterioration by various causes: corrosive atmosphere, aging, ice, vibration, thermal expansion and contraction, etc. It is difficult to simulate the identical complex wetting conditions that can be encountered in service, including large wind-blown water drops, increasing water drop impact pressures with increasing wind velocity, and lateral or upward moving air and water. Some designs are more sensitive than others to this upward moving water.
Note 2: This is a test procedure. It is the responsibility of the specifying agency to determine the specimen construction, size, and test pressures after considering the method’s guidelines. Practical considerations suggest that every combination of panel thickness, span, and design load need not be tested in order to substantiate product performance.
Note 3: This test method shall not, by itself, be relied upon to form conclusions about overall water penetration through metal roofs. A roof contains many details. Although prescribed modifications are outside the scope of this test method, an experienced testing engineer is able to use the principles presented in this test method and generate significant data by isolating specific details and measuring leakage.
SCOPE
1.1 This test method covers the determination of the resistance of exterior metal roof panel systems to water penetration when water is applied to the outdoor face simultaneously with a static air pressure at the outdoor face higher than the pressure at the indoor face, that is, positive pressure. This test method is a specialized adaption of Test Method E331.
1.2 This test method is applicable to any roof area and is intended to measure only the water penetration associated with the field of roof including panel side laps and structural connections. It does not include leakage at openings or perimeter or any other details.
1.3 This test method is limited to specimens in which the side seams and attachments are clearly visible and in which the source of leakage is readily determined. Composite systems in which the source cannot be readily determined are outside the scope of this test method.
1.4 The proper use of this test method requires a knowledge of the principles of pressure and flow measurement.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 The text of this test method references notes and footnotes excluding tables and figures, which provide explanatory material. These notes and footnotes shall not be considered as requirements of the test method.
1.7 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. For specific hazard statements, see 7.1.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of Internati...
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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: E1646 − 95 (Reapproved 2018)
Standard Test Method for
Water Penetration of Exterior Metal Roof Panel Systems by
1
Uniform Static Air Pressure Difference
This standard is issued under the fixed designation E1646; 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 1.8 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method covers the determination of the resis-
ization established in the Decision on Principles for the
tance of exterior metal roof panel systems to water penetration
Development of International Standards, Guides and Recom-
when water is applied to the outdoor face simultaneously with
mendations issued by the World Trade Organization Technical
a static air pressure at the outdoor face higher than the pressure
Barriers to Trade (TBT) Committee.
at the indoor face, that is, positive pressure.This test method is
a specialized adaption of Test Method E331.
2. Referenced Documents
1.2 This test method is applicable to any roof area and is 2
2.1 ASTM Standards:
intended to measure only the water penetration associated with
E331 Test Method for Water Penetration of Exterior
the field of roof including panel side laps and structural
Windows, Skylights, Doors, and Curtain Walls by Uni-
connections. It does not include leakage at openings or
form Static Air Pressure Difference
perimeter or any other details.
E631 Terminology of Building Constructions
E1680 Test Method for Rate of Air Leakage through Exte-
1.3 This test method is limited to specimens in which the
side seams and attachments are clearly visible and in which the rior Metal Roof Panel Systems
E1592 Test Method for Structural Performance of Sheet
source of leakage is readily determined. Composite systems in
which the source cannot be readily determined are outside the Metal Roof and Siding Systems by Uniform Static Air
Pressure Difference
scope of this test method.
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2.2 Other Standard:
1.4 The proper use of this test method requires a knowledge
AAMA 501 Methods of Test for Exterior Walls
of the principles of pressure and flow measurement.
3. Terminology
1.5 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3.1 Definitions—For definitions of general terms relating to
conversions to SI units that are provided for information only
buildingconstructionusedinthistestmethod,seeTerminology
and are not considered standard.
E631.
3.2 Definitions of Terms Specific to This Standard:
1.6 The text of this test method references notes and
3.2.1 specimen—the entire assembled unit submitted for test
footnotes excluding tables and figures, which provide explana-
as described in Section 8.
tory material. These notes and footnotes shall not be consid-
ered as requirements of the test method.
3.2.2 test pressure difference—the specified difference in
static air pressure across the assembled and fixed specimen
1.7 This standard does not purport to address all of the
expressed as pounds-force per square foot (newtons per square
safety concerns, if any, associated with its use. It is the
metre (pascals)).
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
3.2.3 water leakage—penetration of water onto the exposed
mine the applicability of regulatory limitations prior to use.
inside surface of the test specimen under specified conditions
For specific hazard statements, see 7.1.
of air pressure difference across the specimen during a 15-min
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This test method is under the jurisdiction of ASTM Committee E06 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Performance of Buildings and is the direct responsibility of Subcommittee E06.57 Standards volume information, refer to the standard’s Document Summary page on
on Performance of Metal Roof Systems. the ASTM website.
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Current edition approved Nov. 1, 2018. Published November 2018. Originally Available from American Architectural Manufacturers Association (AAMA),
approved in 1995. Last previous edition approved in 2011 as E1646–95 (2011). 1827 Walden Office Square, Suite 550, Schaumburg, IL 60173-4268, http://
DOI: 10.1520/E1646–95R18. www.aamanet.org.
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