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

ASTM E1646

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. Then the specimen is preloaded with a negative static air pressure differential for a minimum of 10 seconds. Practical considerations suggest that every combination of panel thickness, span, and design load need not be tested in order to substantiate product performance.

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: This process is repeated for a total of awtm cycles. This test method is a specialized adaption of Test Method E Composite systems in which the source cannot be readily determined are outside the scope of this test method.


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.

This test method shall not, by itself, be relied upon to form conclusions about overall water penetration through metal roofs. It does not include leakage at openings or perimeter or any other details.

For specific hazard statements, see 7. Referenced Documents purchase separately The documents asfm below are referenced within the subject standard but are not provided as part of the standard. The purpose of this test method is to conduct quality assurance water penetration testing of the roof including panel side laps and structural connections.

Link to Active This link will always route to the current Active version of the standard. The calibrated spray racks shall deliver water uniformly against the roof surface at a minimum rate of five gallons per square foot per hour.

A section of calibrated spray racks are set in place 12 inches above the specimen.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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. Pre-loading is a essential part of the testing procedure. These notes and footnotes shall not be considered as aztm of the qstm method.


Some designs are more sensitive than others to this upward moving water. The test is conducted by attaching the chamber to the test specimen. Read more about what our customers have to say After applying the e1664 there is a two minute recovery period.

For that reason the slope of the roof plays a significant importance.

ASTM E – Farabaugh Engineering and Testing

These factors shall be fully considered prior to specifying the test pressure difference. SITC has utilized this test method to assist our clients with their quality assurance testing of metal panel roof systems. The preload test pressure differences positive and negative are to be specified. The positive test awtm shall be greater than or equal to 15 pounds per square foot.

A roof contains many details.

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 atsm and adjustment. The slope of the roof is significant.