9.27.11.1.(4)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of:

  • performance that falls significantly below expectations, which could lead to an inability to resist expected mechanical, impact and environmental loads, which could lead to deformation or premature failure, or
  • where panel-type siding is installed as bracing to satisfy Subclause 9.23.13.1.(2)(a)(i) and Clause 9.23.13.6.(1)(a), insufficient material strength, which could lead to an inability to resist lateral loads, which could lead to buckling, which could lead to racking of exterior walls.

This is to limit the probability of:

  • precipitation or meltwater ingress, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.

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,
  • deterioration, which could lead to compromised integrity of exterior walls or elements protected by exterior walls, or
  • water accumulation in interior spaces.

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.

Intent 2:

To supersede the thickness requirement stated in the first part of the Sentence and allow a reduced thickness in cases where extra support is provided.

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