Intent 1:
To limit the probability of cladding jamming upon
linear expansion due to an increase in moisture content from exposure
to precipitation, which could lead to buckling, which could lead to:
- the displacement of cladding, trim and flashing, opening
of joints or failure of caulking, 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), insufficient
strength 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, which could lead
to deterioration, which could lead to the structural failure of exterior
walls or elements protected by exterior walls, or
- falling cladding components.
This is to limit the probability of harm to persons.