9.29.10.1.(2)

Objective

OH1 Indoor Conditions

Attribution

[F20,F81-OH1.1,OH1.2]Applies where the substrate serves as a required environmental separation element.

Intent

Intent 1:

To limit the probability of the dislodgement of tiles or the ingress of water behind tiles, which could lead to compromised protection for moisture-vulnerable substrates, which could lead to the deterioration of the substrate, which could lead to studs being unable to resist expected impact, gravity or lateral loads.

This is to limit the probability of:

  • the generation of pollutants, on surfaces or within assemblies, 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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