1. OS2
  2. OP2
  3. OH1
  4. OS1


OH1 Indoor Conditions



Intent 1:

To limit the probability of insufficient contact area between mortar and masonry veneer, which could lead to:

  • the wall being unable to support its own weight or lateral loads,
  • insufficient bonding area between ties and mortar, or
  • insufficient bond strength between masonry units.

Where masonry units support or are part of an environmental separator, this is to limit the probability of excessive moisture transfer through masonry units, which could lead to:

  • precipitation ingress, or
  • compromised thermal performance of components intended to resist heat transfer.

This is to limit the probability of:

  • an inadequate control of temperatures of interior spaces, drafts, 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 further 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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