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9.28.1.5.(1)
ApplicationIntent
OH1OS2
ObjectiveOS2 Structural Safety
Attribution
[F80-OS2.3] Applies to the separation of aluminum flashing from stucco.
Application
Application 1: 
Separation of aluminum flashing from stucco, on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of:
  • an inability to shed water effectively, or
  • a chemical reaction between aluminum flashing and stucco, which could lead to the accelerated deterioration of aluminum flashing material, which could lead to an inability to shed water.
This is to limit the probability of:
  • precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of exterior walls or elements protected by exterior walls, or
  • stucco detaching and falling from the building.
This is to limit the probability of harm to persons.
Intent 2: 
To direct Code users to Subsections 9.27.3. and 9.27.4., which contain requirements for the materials, location, and installation of flashing and caulking for stucco.
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