Field-test water penetration resistance at a window or door interface with the surrounding wall after installation

Steps

1. Use ASTM E1105, Standard Test Method for Field Determination of Water Penetration of Installed Exterior Windows, Skylights, Doors, and Curtain Walls, by Uniform or Cyclic Static Air Pressure Difference
2. Confirm scope: water is applied to the exterior face and exposed edges simultaneously with a static air pressure differential (exterior higher than interior)
3. Set the water application rate to the standard's required rate (5 gph/ft²) and hold the specified pressure differential and duration (test typically runs at least 15 minutes) per the current edition
4. Inspect the interior face and the joint between the assembly and adjacent wall construction for water leakage during the hold period, since E1105 can be used to test the assembly-to-wall joint, not just the unit itself
5. Verify current edition (E1105-15, reapproved as of 2023 per the current cycle) on the ASTM standard page
6. Coordinate test pressure/rate selection with the referencing specification (e.g., AAMA 502/503) since E1105 is typically invoked by those field-testing specifications rather than used standalone