9.23.17.4.(1)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of an inability to resist expected lateral loads, which could lead to differential movement of sheathing board ends, which could lead to damage to cladding and the sheathing membrane, which could lead to:

  • an inadequate fastening base for cladding,
  • inadequate support for required cladding and elements of an environmental separator, or
  • an inability to resist expected lateral or gravity loads, where sheathing provides the required resistance to racking and buckling.

This is to limit the probability of the deformation or displacement of cladding, or the excessive deflection of the wall, which could lead to the displacement or failure of required environmental separation elements, which could lead to:

  • condensation,
  • precipitation ingress,
  • excessive heat transfer,
  • 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, drafts, relative humidity or water accumulation,
  • the 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,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.

This is to limit the probability of harm to persons.

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