Safe manufacturing and use of timber treatments and preservatives

Timber is often treated with chemicals to preserve it, prevent fungus or insects taking hold, and to prevent staining. These chemicals can be hazardous to both produce and use, and particular care needs to be taken to ensure adequate ventilation of areas where timber is being treated.

We have produced guidance with the EPA and the New Zealand Timber Preservation Council on the safe manufacture and use of timber treatment and preservative chemicals.

Timber preservatives and anti-sapstain chemicals

This describes the preferred design and layout of treatment plants and practices when using timber preservatives and anti -sapstain chemicals. 

Safe use of timber preservatives and anti-sapstain chemicals (PDF 351 KB)

While this guidance has not been updated to reflect current work health and safety legislation (the Health and Safety at Work Act 2015 and regulations), it may still contain relevant information and practices to keep workers and others healthy and safe.

Please read this guidance in conjunction with all relevant industry standards that apply to you as a PCBU. This guidance will be progressively reviewed and either updated, replaced with other guidance, or revoked.

Compliance certification requirements

Depending on the type and quantity of chemicals held at your site, you may require one or more of the following compliance certificates:

If you are unsure about your compliance certification requirements, contact a compliance certifier for advice.

Find a compliance certifier(external link)

As a general rule, you should keep the quantities of hazardous substances stored on your site to a minimum. In this way the risks may be reduced and the need for compliance certification reduced.