AAMA Releases Updated Specification for Rating the Severe Wind-Driven Rain Resistance of Windows, Doors and Unit Skylights

AAMA 520-12, Voluntary Specification for Rating the Severe Wind-Driven Rain Resistance of Windows, Doors and Unit Skylights has been released by the American Architectural Manufacturers Association (AAMA).

The specification provides an optional rating of the ability of fenestration products to resist severe wind-driven rain.

AAMA 520-12 is based on a rapidly pulsed pressure differential method, recognizing that conditions encountered during tropical storms, hurricanes or severe thunderstorms are not static. In addition, the procedures and equipment required to perform the specified tests are provided. The document details the testing apparatus used, defines test specimens and installation and describes test methods utilized, as well as stating what information the test report should include.

“The specification is applicable for use in testing and comparative rating of windows, doors and skylights that are used in areas which may be subjected to severe wind-driven rain,” says Ken Brenden, AAMA’s Technical Director. “Updated from the 2009 document, AAMA 520-12 contains a new addendum which provides additional guidance regarding required water collection.”

AAMA 520-12 references important industry documents which include AAMA/WDMA/CSA 101/I.S.2/A440-11, North American Fenestration Standard for Windows, Doors, and Skylights (NAFS) and ASTM E2268-04(2011), Standard Test Method for Water Penetration of Exterior Windows, Skylights and Doors by Rapid Pulsed Air Pressure Difference.

AAMA 520-12, Voluntary Specification for Rating the Severe Wind-Driven Rain Resistance of Windows, Doors and Unit Skylights is available for AAMA members to download at a cost of $10. Non-members may purchase the document at a cost of $30 for download. The specification is also available for purchase on CD and hardcopy. To order AAMA 520-12, visit AAMA’s Publication Store.

More information about AAMA and its activities can be found via the AAMA Media Relations page or on the AAMA website, www.aamanet.org.

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