Weatherboard specification requirements

The requirements for timber weatherboards are found in NZS 3602:2003 Timber and wood-based products for use in building Table 2, 2A.1, which covers permitted species, grade and/or treatment required and the maximum moisture content and applies to all weatherboards whether stained or painted.

This part of Table 2 also refers to clause 111.2, which identifies additional requirements such as no knots or resin pockets. 

E2/AS1 references the profiles that may be used from NZS 3617:1979 Specification for profiles of weatherboards, fascia boards, and flooring, and BRANZ Bulletin 411 Recommended timber cladding profiles and E2/AS1 Table 24 cover the fixing requirements.   

Published in building.