The test standard ASTM E1105 – Standard Test Method for Field Measurement of Water Penetration of Installed Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform or Cyclic Static Air Pressure Difference is used to evaluate water penetration of various building envelope products installed in the field.  This test method is intended to represent the effects of wind loads on exterior building surface components with respect to water penetration.



Summary of Test Method

Test specimens are installed in the exterior building wall and are typically selected by the project architect or owner’s representative.   A test chamber is constructed on the interior or exterior of the specimen with an air supply system that will provide the specified test pressure difference.  A water spray rack is placed on the exterior of the specimen to deliver a spray rate of 5 gal/sf -hour.  The ASTM E1105 test pressures are applied in the  positive (inward) direction while the specimen is inspected for water penetration.  Calibrated test measuring equipment is used to measure test pressures and water spray rate.   A record of visual observations are made to evaluate the system and any failures of the specimen.   



Significance and Use

The ASTM E1105 Test Standard is an industry standard that is used to evaluate building envelope  products with respect to pressures induced by wind load on a building structure.  In many cases,  this test is required by many project specifications and various building codes.   Project designers typically use the test data and results to develop specific project calculations and details for construction of the system being used.