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5.7.1.1.(2)
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Construction of foundation walls for buildings, with respect to surface water.
This applies to building materials, components, assemblies and their interfaces described in Sentence 5.1.2.1.(1) that are installed in buildings to which Part 5 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 5].
Exceptions: 
except as stated in Sentence 5.7.1.1.(3), which applies to buildings specifically designed to accommodate the accumulation of water at the building or the ingress of water.
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Intent
Intent 1: 
To limit the probability of excessive moisture loading on foundation walls, which could lead to:
  • surface water ingress, or
  • prolonged exposure of building materials to moisture, which could lead to damage to moisture-susceptible materials.
This is to limit the probability of:
  • the inadequate control of 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 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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