ASTM International E Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference. ASTM E(). Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure. ASTM E is the standard test method for water penetration of exterior metal roof panels by uniform static air pressure difference. The ASTM E test.

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A roof contains many details. After applying the preload there is a two minute recovery period. The slope of the roof is significant. These notes and footnotes shall not be considered as requirements of the test method.

ASTM E – Farabaugh Engineering and Testing

This test method shall not, w1646 itself, be relied upon to form conclusions about overall water penetration through metal roofs. This test method is a specialized adaption of Test Method E A section of calibrated spray racks are set in place 12 inches above the specimen. These factors shall be fully considered prior to specifying the test pressure difference.

Some designs are more sensitive than others to this upward moving water. The purpose of this test method is to conduct quality assurance water penetration testing of the roof including panel side laps and astk connections.

Composite systems in which the source cannot be readily determined are outside the scope of this test method. The preload test pressure differences positive and negative are to be specified.


For that reason the slope of the roof plays a significant importance. It does not include leakage at openings or perimeter or any other details. The calibrated spray racks shall deliver water uniformly against the roof surface at a minimum rate of five gallons per square foot per hour.

In service, the performance also depends on the rigidity of supporting construction, roof slope, asrm on the resistance of components to deterioration by various causes: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Link to Active This link will always route to the current Active version of the standard.

Historical Version s – view previous versions of standard. Prior to testing a positive static air pressure differential preload is applied.

ASTM E1646

Then the specimen is preloaded with a negative static air pressure differential for a minimum of 10 seconds. Pre-loading is a essential part of the testing procedure. For specific hazard statements, see 7. This is a test procedure.

The test is conducted by attaching the chamber to the test specimen. SITC has utilized this test method to assist our clients with their quality assurance testing of metal panel roof systems. Practical considerations suggest that every combination of panel thickness, span, and design load need not be tested in order to substantiate product performance. 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.


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. 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. 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.

The positive test pressure shall be greater than or equal to 15 pounds per square foot. Read more about what our customers have to say This process is repeated for a total of three cycles. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.