9.29.10.4.(1)

Objective

OH1 Indoor Conditions

Attribution

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

Intent

Intent 1:

To limit the probability that the tile substrate will have an inadequate resistance to water.

This is to limit the probability of the deterioration of the substrate, which could lead to:

  • the generation of pollutants, on surfaces or within assemblies, from biological growth or from materials that become unstable on wetting, and
  • where the substrate supports or 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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