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9.19.1.2.(5)
OS2OH1OH2
ObjectiveOH2 Sanitation
Attribution
[F42-OH2.5] Applies to resistance to the entry of insects.
Application
Application 1: 
Vents for attic or roof spaces, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where insulation is installed above the ceiling and below the roof sheathing.
Exceptions: 
except as stated in:
  • Sentence 9.19.1.1.(1), where attic or roof space venting can be shown to be unnecessary, and
  • Sentence 9.19.1.4.(1), which applies to the lower portions of mansard or gambrel roofs.
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Intent
Intent 1: 
To limit the probability that the performance of vents will fall significantly below expectations with respect to protection against the ingress of insects, which could lead to an infestation of insects, which could lead to unsanitary conditions, which could lead to harm to persons.
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