APPENDIX/DIAGNOSTICS
Water Leakage
Along with the heat transmission and airtightness measurements discussed above, their are other
performance factors relevant to the thermal envelope. Of particular interest, several test methods
exist to assess water leakage including ASTM E 331 and E 1105 and AAMA 501.1, 501.2 and
501.3. Both ASTM E 331 and E 1105 are tests for water penetration of envelope mock-ups using a
chamber and subjecting the test specimen to an air pressure difference. The results of the test
consists of those location where water leakage occurs, along with the pressure differences to which
the specimen was subjected. ASTM E 1105 AAMA 501.1 is a water penetration test of a mock-up
in which the specimen is subjected to dynamic pressures. AAMA 501.2 is a field test for water
leakage which is recommended for checking the wall early in construction. It enables the detection
of fabrication and installation problems when there is still an opportunity to correct them. AAMA
501.3 is a field measurement of water penetration of installed windows, curtain wall and doors
subjected to a uniform air pressure difference, using both static and dynamic pressures. AAMA has
also developed a specification (AAMA 502) for field testing of windows and sliding glass doors that
establishes the requirements of air and water leakage testing using ASTM E 331 and E 1105.
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