1. OS2
  2. OP2
  3. OH1
  4. OS2
  5. OP2
  6. OH1
  7. OH4
  8. OS3


OH1 Indoor Conditions


(b) [F21-OH1.1,OH1.2,OH1.3]Applies to elements that support or are part of an environmental separator.


Intent 1:

To limit the probability that weathering of pyritic material will lead to excessive loading on foundation walls, under lateral soil pressure, with attendant structural damage to the foundation and superstructure.

For elements serving as an environmental separator or supporting an environmental separator, this is to limit the probability of:

  • pollutant ingress (from the exterior or from adjacent interior space, including soil gas, combustion products from parking garages, and particulates),
  • precipitation ingress,
  • condensation, or
  • the ingress of moisture from the ground.

This is to limit the probability of:

  • an 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 elements supported 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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