The ASTM E 331 (Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference) is a testing standard that describes the procedures to determine the water penetration resistance of windows, curtain walls, skylights, and doors when water is applied using a calibrated spray apparatus while simultaneously applying uniform static pressure to opposite sides of the test specimen.
This standard is most often referenced as a laboratory test and is similar to the ASTM E 1105 (Standard Test Method for Field Determination of Water Penetration of Installed Exterior Windows, Skylights, Doors, and Curtain Wall by Uniform or Cyclic Static Air Pressure).
The ASTM E 1105 is specifically written for field-testing installed fenestrations. The ASTM E 331 is also similar to the ASTM E 547 with the exception of the way air pressure is applied. The ASTM E 331 is a uniform test of consistent air pressure, and the ASTM E 547 is a cyclic test during which air pressure is cycled on and off during testing.
The ASTM E 331 testing is performed by applying water to the exterior of the test specimen while lowering the pressure inside by means of an air chamber built on the inside or opposite side of the test specimen. The water spray system has nozzles spaced on a grid to deliver water so that the test specimen is wet uniformly, includingthose areas vulnerable to water penetration.
The calibrated spray apparatus (spray-rack system) delivers water to the test specimen at a rate of 5.0 U.S. gal/ft²-h. The testing pressure differential is usually determined by the testing specifier. Most generic specifications call for a minimum testing pressure of 6.24 psf.
BDG utilizes professional testing equipment that is calibrated to each specific testing standard for accurate results. Our field consultants are properly trained and knowledgeable of all testing standards. BDG has extensive knowledge of most building systems and specializes in forensic water intrusion investigations. This allows us to not only properly test fenestrations on new construction projects, but also pinpoint the cause of any test failures and provide accurate recommendations to achieve successful testing results. Failures during quality assurance (new construction) testing can result in unnecessary delays that impact your bottom line.
If you are looking for a reputable second or third-party testing company to perform accurate professional testing, provide concise reports, and help you through the entire process, contact BDG today. We provide testing services throughout the United States from our headquarters located in Atlanta, GA.
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