1. OH1
  2. OS2
  3. +


OH1 Indoor Conditions



Intent 1:

To limit the probability of inadequate insulation, moisture protection and vapour diffusion protection of interior spaces, which could lead to:

  • water accumulation,
  • condensation,
  • compromised thermal performance of components intended to provide resistance to heat transfer, or
  • premature failure of the moisture protection.

This is to limit the probability of:

  • an inadequate control of the temperature of interior spaces or relative humidity,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of assemblies acting as 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.

Intent 2:

To clarify that insulation fulfilling the functions of the protection of interior finishes from moisture and that of the vapour barrier must cover the entire foundation wall.

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