Sentence 9.26.6.2.(1)

  1. OH1
  2. OS2

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of the retention of water that has penetrated roofing or that has condensed on the underside of underlay, which could lead to long-term wetting of sheathing, which could lead to deterioration, which could lead to further:

  • condensation,
  • 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
  • further 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.

Top of Page