treatment

How to read the numbers branded onto treated timber in New Zealand. Covers every NZTPC preservative code, what WOODmark® certification means, and how to decode a brand stamp at a glance.

A practical guide to NZ timber treatment hazard classes H1.2 through H5 from the sawmill floor. Covers LOSP, boron, CCA, the pink-vs-gold H1.2 colour question, preservative codes, and what each class means for milling, sorting, stocking, and dispatching treated timber.