9.29.2.1.(1)

Objective

OH1 Indoor Conditions

Attribution

[F80,F81-OH1.1,OH1.2]Applies where interior finishes support or serve as required environmental separation elements.

Intent

Intent 1:

To limit the probability of:

  • exposure of moisture-vulnerable interior finishes to water, which could lead to the ingress of water into wall assemblies, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.

Where interior finishes support or serve as required environmental separation elements, 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 deterioration of interior finishes, which could lead to compromised integrity of exterior walls or elements protected by exterior walls.

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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