Hazard Levels
Treated Pine Hazard Levels
The following information explains the Hazard Levels of Treated Pine and what exposure, conditions the timber can be used in,
and hazards the timber can be exposed to after treatment.
Hazard Level H1
- Exposure - Inside, above-ground
- Conditions - Completely protected from elements and well-ventilated
- Hazards - Insects other than termites (ie. lyctid or anobiid)
Hazard Level H2
- Exposure - Inside, above-ground
- Conditions - Completely protected from elements and well-ventilated
- Hazards - Borers including termites
Hazard Level H3
- Exposure - Outside, above-ground
- Conditions - Subject to periodic moderate wetting and leaching
- Hazards - Moderate decay, borers and termites
Hazard Level H4
- Exposure - Outside, in-ground
- Conditions - Subject to severe wetting and leaching
- Hazards - Severe decay, borers and termites
Hazard Level H5
- Exposure - Outside, in-ground, contact with or in fresh water
- Conditions - Subject to extreme wetting and leaching, or where critical use provides higher degree of protection
- Hazards - Very severe decay, borers and termites
Hazard Level H6
- Exposure - Marine water
- Conditions - Subject to prolonged immersion in sea water
- Hazards - Marine wood borers and decay