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9.27.2.1.(2)
ApplicationIntent
OS2OH1
ObjectiveOH1 Indoor Conditions
Attribution
[F80,F81-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Design and construction of exterior walls to which Subsection 9.27.2. applies [see Article 9.27.1.1. for application of Subsection 9.27.2.].
Exceptions: 
except where exterior walls are protected from specific mechanisms of deterioration.
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Intent
Intent 1: 
To limit the probability that environmental separators will deteriorate at an unacceptable rate, which could lead to their premature failure, 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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