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Performance Testing of Window Installation and Flashing Details
Abstract
Protection of interface at windows and other
penetrations from rainwater intrusion is a
primary need of building structures. This is
especially true when the building is in a high
weather exposure location or in a climate in
which the ability for walls to dry may be limited.
Two areas of specific concern are: 1) the bottom corners of windows where
damage is most commonly seen, and 2) the area around curved, arched or round-top
windows where it is difficult to install the
standard flashing materials.
This paper reviews performance testing of
window flashing installation methods commonly
used in the trade, as well as improved methods
made possible by recent advancements in
flashing products.
A series of laboratory tests were designed to
determine water resistance, air leakage resistance
and durability of several installation methods
with different flashing materials. Windows were
installed in test wall sections using several
methods. The installations were monitored and
evaluated for ease of installation and then tested
for air leakage and water resistance using ASTM
E283 and ASTM E331. The durability of the
installations was then evaluated by subjecting the
walls to thermal cycling (0 to 160oF) and retesting
for water resistance using ASTM E331.
Recommendations for best practice installation
based on the testing results and key material
selection issues are presented.
Citation
Weston, T. A.; Herrin, J. (2002). Performance Testing of Window Installation and Flashing Details. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /4585.