9.27.5.1.(1)

Intent 1:

To limit the probability of fastening cladding to an inappropriate substrate.

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), this is to limit the probability of an inadequate resistance to lateral loads, which could lead to racking of exterior walls, which could lead to:

• inadequate support of supported environmental separation elements, or
• the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity.

Where exterior walls support floors, this is to limit the probability of the deflection or vibration of such floors, which could lead to negative effects on the psychological well-being of persons.