Intent 1:
To limit the probability of panel edges jamming
upon linear expansion due to an increase in moisture content from
exposure to precipitation, which could lead to buckling.
This is to limit the probability of:
- the excessive deformation, displacement or cracking
of cladding, the opening of joints or the failure of caulking, or
- where support spacing does not exceed 400 mm and panel-type plywood cladding 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,
which could lead to the excessive deformation, displacement or failure
of required environmental separation elements.
This is to limit the probability of:
- 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.