Sentence 9.25.2.4.(4)

  1. OS2
  2. OH1
  3. +
  4. OS2
  5. OH1
  6. OP2
  7. OP3
  8. OS3
  9. OH4
  10. OS2
  11. OH1

Objective

OH1 Indoor Conditions

Attribution

(c) [F81-OH1.1,OH1.2,OH1.3]Applies where the interior finish provides the required bracing.

Intent

Intent 1:

To limit the probability of:

  • inadequate protection of the insulation, air barrier system or vapour barrier, or
  • where the interior finish contributes to the required bracing, the inadequate performance of the interior finish, which could lead to an inability to resist expected lateral loads, which could lead to excessive racking.

This is to limit the probability of the failure of required environmental separation 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, drafts, relative humidity or water accumulation in interior spaces,
  • 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, or
  • contact with moisture.

This is to limit the probability of harm to persons.

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