Intent 1:
To limit the probability of water, from rain or
melted snow, running down the face of cladding, entering the joints
between shingles or shakes, and penetrating the cladding assembly
through joints in underlying courses or through corresponding joints
between shingles or shakes in lower courses.
This
is to limit the probability of:
- precipitation or meltwater ingress, or
- compromised thermal performance of components intended
to provide resistance to heat transfer.
This is to limit the probability of:
- an inadequate control of temperatures 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 exterior walls or elements protected by exterior walls, 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.