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9.29.10.5.(1)
OH1OS2OS1OP2
ObjectiveOH1 Indoor Conditions
Attribution
[F81-OH1.1,OH1.2] Applies where the substrate serves as a required environmental separation element.
Application
Application 1: 
Caulking of joints for ceramic or plastic tile interior wall finishes installed 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 that the performance of caulking will fall significantly below expectations, which could lead to the premature failure of caulking, which could lead to the failure of tiles and substrates on repeated exposure to water, which could lead to:
  • the ingress of water into assemblies, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of the deterioration of the substrate, which could lead to:
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • where the substrate serves as a required environmental separation element, the failure of such 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 further 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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