3.3.6 Compatibility with metal
Measures shall be taken to prevent adverse effects from incompatibility between metal components and treated timber.
Copper-containing treatments can cause corrosion between mild steel and aluminium. Where moisture is expected, the following fittings should be used when in contact with timber treated with copper-containing preservatives:
- occasional dampness – galvanised fittings
- likely wetting – austenitic stainless steel fittings.
Preservative treated timber should be re-dried to a moisture content of 22% or less before being in contact with metal fittings.
Last updated: 2nd January 2024