How Heat Treatment Works
Pallets or lumber are heated, typically in a chamber, until the core of the wood reaches at least 56°C, then held there for at least 30 continuous minutes. Providers commonly track the temperature during treatment.
After treatment, the wood is stamped with the IPPC wheat mark. The mark shows the treatment type and identifies the provider, so it is worth looking for on every pallet you receive.
- Minimum 56°C core temperature
- At least 30 continuous minutes
- IPPC wheat-mark stamp with HT code

