The Fenestration and Glazing Industry Alliance (FGIA) has updated AAMA 511-22 (Voluntary Guide for the Forensic Evaluation of Water Intrusion at Fenestration Products). The document provides specific information to help select the appropriate adaptions to existing testing standards for application to field investigations of fenestration products.

This guide offers supplemental guidance to ASTM E 2128 (Standard Guide for Evaluating Water Leakage of Building Walls).

“Building damage caused by uncontrolled water penetration through exterior walls is a serious concern of owners, contractors, architects and product manufacturers,” says Dan Johnson, co-chair of the AAMA 502/511 Field Test and Forensic Investigation Document Update Task Group. “Often, improper or inadequate leak investigations and testing result in investigators misidentifying the source of water penetration through the exterior wall.”

Johnson adds that these errors result from observations of water penetration at or near a fenestration product opening that might originate from the surrounding construction.

In other cases, the water penetration is a combination of sources that include the fenestration product assemblies. A systematic forensic investigation of the water penetration is required to determine the actual source of the leak.