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AAMA Releases Voluntary Test and Classification Method for Drained and Back Ventilated Rain Screen Wall Cladding Systems

Post Time:Oct 27,2009Classify:Success StoriesView:1322

The American Architectural Manufacturers Association (AAMA) has released AAMA 509-09, a test and classification method based on the results of testing a representative sampling of drained and back ventilated rain screen wall cladding systems. Titled Voluntary Test and Classification Method for Drained and Back Ventilated Rain Screen Wall Cladding Systems, the document addresses air leakage of the air/water barrier, air flow/cavity ventilation and water management. The primary purpose of this test method is to quantify the volume of rainwater contacting an imperfect air/water barrier and the system's ability to allow for ventilation/drying as measured by airflow through the cladding.

AAMA’s Drained and Back Ventilated Rain Screen Study Group, chaired by Scott Warner of Architectural Testing Inc., developed the test method.

“This voluntary test and classification method establishes the requirements for test specimens, apparatus, test procedures, test reports and performance data that may be used in the evaluation of drained and back ventilated rain screen wall cladding systems," Warner says. "The test method is intended to provide test data that will help the user make an informed evaluation of the system performance based on the degree of wetting of the air/water barrier and the available ventilation/drying of the drained and back ventilated rain screen wall cladding systems."

Source: usgnnAuthor: shangyi

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