Intent 1:
To limit the probability of:
- inadequate up-stand inboard of the sheathing membrane
or sheathing installed in lieu of the sheathing membrane,
- inadequate slope to the exterior,
- lack of end dams or inadequate height of end dams,
- inadequate lap over the building element below, and
- lack of a drip or inadequate offset of the drip from
the face of the building element below.
This is to limit the probability of:
- precipitation or meltwater ingress at openings through
cladding, and
- an inadequate dissipation of precipitation or meltwater
to the exterior, which could lead to the excessive accumulation of
moisture.
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, 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, and
- contact with moisture.
This is to limit the probability of harm to persons.