H2

H2 is a hazard level for treated lumber that indicates the level of protection against decay and insect attack. The H2 treatment is a light-duty treatment and is suitable for use in above-ground, interior applications where the timber is not in direct contact with the ground or exposed to the weather.

The H2 treatment process involves treating the lumber with a preservative that contains copper and an azole fungicide. This treatment provides protection against decay fungi and borers, but not against termites.

H2 treated lumber is commonly used for a range of applications, including framing, flooring, and decorative timber. However, it is important to note that H2 treated lumber is not suitable for use in applications where it will be exposed to the weather or in contact with the ground. For those applications, a higher hazard level treatment, such as H3 or H4, would be required.