Use Classes, (formerly referred to as Hazard Classes), have been introduced to help specifiers and users of treated timber, identify and confirm the level of protection their timber requires for a particular end use.

The table below shows the main USE CLASSES that can be specified.

Generally a greater degree of protection is required as the Use Class increases. These Use Classes are used throughout the industry to provide a common understanding of the level of protection that is required for a given application.

USE CLASSES