After the test specimens are prepared and penetrated

[akterchumma699]

The second option in Section 5.2 incorporates modified versions of ASTM E331, Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors and Curtain Walls by Uniform Static Air Pressure Difference, and ASTM E547, Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors and Curtain Walls by Cyclic Static Air Pressure Difference.

with nails in a similar fashion to the first test method, water spray is then applied to the exterior while a differential pressure of 38 mm (1.5 in.) of water (373 Pa [7.8 psf]) is induced and maintained for a period of five rcs data minutes, released for one minute, and then repeated for four full cycles. Note this method orientates the panel vertically during the testing, which begins to relate to a vertically-oriented wall condition. After testing, the membrane edges are lifted away from the substrate to reveal the back. At this point, observations are made regarding evidence of water penetration.

This procedure is then repeated with a second test specimen with five minutes at a higher pressure differential and then one minute with no pressure for four cycles, along with observations of the back of the membrane and substrate. Available data for this evaluation method is limited, since this option does not appear to be commonly utilized in the industry.

You May Also Like Building Enclosures: Understanding the commissioning process
Something unique to AAMA 711 is both options require the testing to be conducted before and after thermal cycling of the samples. However, as currently published, these methods are ultimately subject to the same limitations as ASTM D1970 with the use of nails.