E2 and E2/AS1
When it comes to weathertightness, Building Code Clause E2 External moisture and the compliance document E2/AS1 are the critical documents for any designer.
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When it comes to weathertightness, Building Code Clause E2 External moisture and the compliance document E2/AS1 are the critical documents for any designer.
Weathertightness failure of a building’s exterior cladding results in water penetrating the cladding and entering the exterior wall assembly. This water needs a path to get out again.
A large proportion of weathertightness building failures have resulted from insufficient maintenance – some could have been avoided if owners had been better informed.