9.23.2.2.(1)

Intent 1:

To limit the probability of inadequate moisture resistance or inadequate provision for drying, which could lead to extended exposure to surface water or to water from the ground transferred through masonry or concrete, which could lead to wood decay, which could lead to an inability to resist expected gravity or lateral loads, which could lead to excessive movement, deflection or deformation.

Where wood-frame construction supports or is part of an environmental separator, this is to limit the probability of the displacement or failure of required environmental separation elements, which could lead to:

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

This is to limit the probability of:

• 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.