Intent 1:
To limit the probability of:
- an inadequate resistance to withdrawal from the substrate,
and
- an inadequate contact area between the staple's crown
and the shingle's surface, which could lead to excessive stressing
of the staple/shingle interface, which could lead to pull-through
failure.
This is to limit the probability of
the displacement of shingles, which could lead to:
- 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 relative humidity, temperatures
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 compromised integrity
of roofs or assemblies protected by roofs.
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.