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9.27.3.7.(1)
ApplicationIntent
OS2OH1
ObjectiveOS2 Structural Safety
Attribution
[F61,F62,F80-OS2.3]
Application
Application 1: 
Flashing for cladding assemblies to which Subsection 9.27.3. applies [see Article 9.27.1.1. for application of Subsection 9.27.3.].
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Intent
Intent 1: 
To limit the probability of:
  • installing flashing with inadequate water resistance, and
  • the premature failure of flashing materials on exposure to moisture, sunlight, temperature extremes or mechanical stresses.
This is to limit the probability of inadequate protection for exterior walls, which could lead to:
  • precipitation or meltwater ingress, and
  • an inadequate dissipation of precipitation or meltwater to the exterior.
This is to limit the probability of deterioration, which could lead to compromised structural integrity of exterior walls or elements protected by exterior walls, which could lead to harm to persons.
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