Intent 1:
To limit the probability of:
- warping or buckling on exposure to water, or
- water penetrating the edges of panels, which could lead
to swelling or deterioration of adhesive.
This is to limit the probability of:
- edge joints becoming misaligned or pulling away from
trim and flashing,
- insufficient strength to resist impact forces or wind
action, or
- where panel-type siding is installed as bracing to satisfy Subclause 9.23.13.1.(2)(a)(i) and Clause 9.23.13.6.(1)(a), an inability
to resist lateral loads, which could lead to racking of exterior walls.
This is to limit the probability of the displacement of
cladding, trim and flashing, opening of joints or failure of caulking,
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 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.