SCHAUMBURG, ILL. – AAMA 520-09, a voluntary specification for windows, doors and unit skylights has been released by the American Architectural Manufacturers Association (AAMA). The publication, titled Voluntary Specification for Rating the Severe Wind-Driven Rain Resistance of Windows, Doors and Unit Skylights provides an optional rating of the ability of fenestration products to resist severe wind-driven rain.

The release of AAMA 520-09 completes a 12-month review process led by the AAMA Southeast Region during which the document was evaluated and then shared with AAMA-accredited testing laboratories and other members to ensure that the specifications are clear and the test protocols yield repeatable results.

This voluntary specification 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 specification 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.

“This specification is applicable for use in testing and comparative rating of windows, doors and unit skylights that are intended for use in areas which may be subjected to severe wind-driven rain conditions,” says Ken Brenden, AAMA technical services manager.