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9.28.1.5.(1)
ApplicationIntent
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
[F80-OH1.1,OH1.2,OH1.3] 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
  • with respect to the separation of aluminum flashing from stucco, 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, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of temperatures of interior spaces or relative humidity,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting,
  • deterioration, which could lead to compromised integrity of exterior walls or elements protected by exterior walls, or
  • water accumulation in interior spaces.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
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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