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9.29.5.2.(1)
ApplicationIntent
OP2OS2OS1OH1
ObjectiveOH1 Indoor Conditions
Attribution
[F20,F22,F80,F81-OH1.1,OH1.2] Applies where interior finishes support or serve as required environmental separation elements.
Application
Application 1: 
Gypsum board for nailed and screwed single-layer installations as interior wall and ceiling finishes on wood furring or framing, in 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 that the performance of gypsum products will fall significantly below expectations, which could lead to an inability to resist expected impact, gravity or lateral loads.
Where interior finishes support or serve as required environmental separation elements, this is to limit the probability of the deformation or detachment of interior finishes, which could lead to the failure of required environmental separation elements, which could lead to:
  • condensation,
  • precipitation ingress,
  • pollutant ingress, or
  • compromised thermal performance of components intended to resist heat transfer.
This is to limit the probability of:
  • an inadequate control of temperatures of interior spaces,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to further compromised integrity of environmental separators.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces, or
  • the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.
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