Intent 1:
To limit the probability of the premature failure
of flashing materials on exposure to moisture, sunlight, temperature
extremes or mechanical stresses, which could lead to precipitation
or meltwater ingress.
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 roofs or assemblies protected by roofs, 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.