Intent 1:
To limit the probability that inaccurate snow load
assumptions will lead to assemblies being unable to resist gravity,
snow and rain loads.
This is to limit the probability
of excessive movement, deformation or damage to roofing, which could
lead to:
- precipitation ingress, or
- air leakage, which could lead to 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,
drafts, relative humidity, or water accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting, or
- deterioration, which could lead to compromised integrity
of environmental separators or of elements protected by such 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.