Intent 1:
To limit the probability of:
- [Clause 9.25.2.4.(6)(a)] inadequate attic or roof
space ventilation, and
- [Clause 9.25.2.4.(6)(b)] inadequate thermal resistance.
This is to limit the probability of:
- condensation, which could lead to the accumulation of
moisture,
- the formation of ice dams, which could lead to the ingress
of melted water,
- compromised thermal performance of components intended
to provide resistance to heat transfer, or
- excessively low temperatures of interior surfaces or
within assemblies.
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.