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9.13.3.1.(1)
ApplicationIntent
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
[F61-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Waterproofing of exterior surfaces of:
  • floors-on-ground that are subject to hydrostatic pressure, and
  • walls below ground level that are subject to hydrostatic pressure, where the finished ground level outside is higher than the ground level inside.
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of an inadequate resistance to water from the ground, under hydrostatic pressure, which could lead to:
  • the ingress of moisture from the ground, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of the temperature of interior spaces, 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 elements supported or protected by floors-on-ground or foundation walls.
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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