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9.29.2.2.(1)
ApplicationIntent
OH1OS2OS1OP2
ObjectiveOH1 Indoor Conditions
Attribution
[F80,F81-OH1.1,OH1.2] Applies where interior finishes support or serve as required environmental separation elements.
Application
Application 1: 
Acceptable materials for waterproof walls of shower stalls and around bathtubs, 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 of repeated water exposure of moisture-vulnerable interior finishes, which could lead to the deterioration of interior finishes.
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 or relative humidity,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • the further deterioration of interior finishes.
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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