Intent 1:
To limit the probability of openings in environmental
separators, which could lead to:
- the ingress of precipitation,
- the ingress of insects or vermin,
- excessive heat transfer,
- condensation,
- the accumulation of moisture or the ingress of water
backed up by ice dams,
- drafts, or
- the ingress of pollutants from adjacent attic or roof
spaces.
This is to limit the probability of:
- compromised thermal performance of components intended
to provide resistance to heat transfer, which could lead to 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,
- deterioration, which could lead to compromised integrity
of ceilings acting as environmental separators, or
- water accumulation in interior spaces.
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.