Intent 1:
To limit the probability of:
- precipitation ingress, or
- excessive air infiltration or “wind-washing,” which
could lead to condensation or excessive heat transfer.
This is to limit the probability of
the failure of required environmental separation elements, which could
lead to compromised thermal performance of components intended to
resist heat transfer, which could lead to:
- an inadequate control of the temperature of interior
spaces 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.
Intent 2:
To clarify the application of Sentence 9.27.3.6.(1).