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9.12.3.1.(1)
ApplicationIntent
OS2OP2OH1OH4OS3
ObjectiveOH1 Indoor Conditions
Attribution
[F81-OH1.1,OH1.2,OH1.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Placement of backfill around the foundations of 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 that improperly placed backfill will lead to:
  • damage to the foundation's moisture-control elements,
  • the cracking of foundation walls, or
  • damage to externally-applied thermal insulation.
For environmental separators or elements supporting an environmental separator, this is to limit the probability of:
  • pollutant ingress from the exterior or from adjacent interior spaces, including soil gas, combustion products from parking garages, or particulates,
  • condensation,
  • precipitation ingress,
  • 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
  • compromised integrity of the foundation or of elements supported or protected by the foundation, which could lead to the deterioration of building elements.
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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