A comprehensive review of steps for performing field water leakage testing on glass facades and windows per international standards and approved codes (AAMA).
The Goal of Field Water Testing for Installed Facades
Field testing aims to uncover any fabrication defects or site installation errors in gaskets and silicone before closing out the building's interior finishes. This early validation saves time and the exorbitant costs associated with repairing leaks after the building is fully occupied.
Calibrated Nozzle Specifications and Required Water Pressure
Per the AAMA 501.2 standard, a specialized calibrated spray nozzle connected to a pressure line and gauge is utilized. A constant water pressure between 30 to 35 PSI must be maintained at the nozzle to deliver an impact force simulating heavy wind-driven rain.
Steps for Inspecting Facade Joints and Defining Time Protocols
The facade is divided into designated test sections (typically 1.5 meters per joint segment). The technician concentrates the water spray perpendicularly at a set distance, moving the nozzle slowly along the joints for a defined 5-minute duration per segment, while another engineer stands inside monitoring for any moisture patterns or water droplets.
Protocol for Dealing with Leakage Points and Re-Testing
If a leak is detected, its position is precisely mapped on the drawings and testing is paused to diagnose the cause. Quick fixes like applying superficial silicone are rejected; the internal drainage path (weep holes) must be inspected, damaged gaskets replaced, and the affected section fully re-tested to verify a successful repair.
