Hazards that effect the durability of wood

Building elements may be exposed to a range of physical, chemical or biological hazards which vary with the end-use application.

Hazards to wood include:

Biological - Insects, Fungi, Bacteria
Chemical - Strong acids and alkali
Physical - Wear and tear, the elements.

These are described in more detail in Hazards - Printable PDF.

Preservative standards specify the levels of protection against the potential threat of the most important biological hazards to timber in any particular end-use application, Hazard Classes.

This is achieved through the impregnation of a chemical treatment to eliminate or minimise any future in-service susceptibility to these hazards.

NB: The code has changed as of April 2011 to use H1.2 for Timber Treatment for enclosed framing. Read the brochure Pink is Tough - H1.2 Frames it Right here.
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