Issue 36 – March 2012
NZS 3602:2003 Timber and wood-based products for use in buildings requires H3.1-treated timber weatherboards to be painted. Unpainted ends or joints or ripped edges are all potential moisture entry points that could cause premature failure of the paint coating and ultimately the timber. NZS 3602 specifies that H3.1-treated weatherboards and external finishing timbers are painted on all faces including cut ends and joints before fixing in place.
NZS 3602 also sets out the specific grading requirements for weatherboards.
- NZS 3602:2003 Timber and wood-based products for use in building