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9.15.6.2.(1)
OH1OS2OP2
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Exterior surfaces of concrete block foundation walls that are above ground level on soils having an allowable bearing pressure of 75 kPa or greater, for buildings of wood-frame or masonry construction to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Sentence 9.15.1.2.(1), which applies to buildings that are erected on permafrost.
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Intent
Intent 1: 
To limit the probability of excessively porous mortar between concrete blocks, which could lead to an inadequate resistance to water.
Where elements support or are part of an environmental separator, this is to limit the probability of:
  • the ingress of surface water or rainwater, 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, 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 foundation walls or elements supported or protected by 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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