Timber Treatment Guide

The best indicator for appropriate use of treated timber is “hazard class” as outlined in AS1604.

Simply click to activate animation and then roll over each coloured spot to see which hazard class suits that application.


* Refer to standards for more detailed information as per AS1604 and NSW TMA

** CCA treated timber has some limitations to its use within the Australian market. CCA treated timber cannot be used for garden furniture, picnic tables, exterior seating, children’s play equipment, patio and domestic decking, and hand rails. Alternative treatments such as NatureWood ACQ® and Protim® Optimum are registered for use in these applications. Koppers Performance Chemicals recommends either of these preservative options as suitable alternatives. 2007© Koppers Performance Chemicals Australia Pty Ltd. Koppers®, ACQ® and Protim® are registered trademarks of Koppers Inc or its subsidiaries.