“… it can be concluded that the face seal systems evaluated in this study are very sensitive to design and construction variables which lead to ingress of water through the cladding, and that in the environment of the Lower Mainland it may not be possible to achieve acceptable performance with face sealed systems. Concealed barrier systems are also very sensitive to water ingress through the exterior cladding and weather barrier. In order for these systems to perform adequately, significant improvement is required in the design and construction of interface details.”
Survey of Building Envelope Failures in the Coastal Climate of British Columbia
CMHC, June 1998
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