Intent 1:
To limit the probability of:
- precipitation or meltwater ingress through the second
plane of protection, and
- an inadequate dissipation to the exterior of precipitation
or meltwater that does bypass the first plane of protection.
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,
- the ingress of water into interior spaces, or
- deterioration, which could lead to compromised integrity
of exterior walls or elements protected by exterior walls.
This is to limit the probability of:
- negative effects on the air quality of indoor spaces,
- the inadequate thermal comfort of persons, or
- contact with moisture.
This is to limit the probability of harm to persons.