9.26.5.1.(1)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of inadequate protection of the roof area where water is being retained near the eaves by ice dams or where heat transferred through the ceiling below causes snow to melt and ice dams to form.

This is to limit the probability of:

  • precipitation or meltwater ingress, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.

This is to limit the probability of:

  • an inadequate control of relative humidity, temperatures of interior spaces 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 roofs or assemblies protected by roofs.

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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