ISPM-15 Heat Treatment: The Export Requirement You Can't Ignore

If you are shipping goods across international borders on wooden pallets, ISPM-15 compliance is not optional. The International Standards for Phytosanitary Measures No. 15 is a global regulation administered by the International Plant Protection Convention (IPPC) that requires all wood packaging materials used in international trade to be treated to kill pests that could spread between countries.

What Heat Treatment Means

The most common compliance method is heat treatment (HT). The pallet must be heated until the core temperature of the wood reaches 56 degrees Celsius for a minimum of 30 continuous minutes. This kills insects, larvae, and pathogens that could be living in the wood. Once treated, the pallet is stamped with an IPPC mark that includes the country code, producer number, and the HT designation.

The alternative is methyl bromide fumigation (MB), but this method is being phased out in many countries due to its ozone-depleting properties. Heat treatment is the standard, and it is what most Canadian suppliers offer.

When You Need It

You need ISPM-15 compliant pallets any time your shipment crosses an international border — including shipments between Canada and the United States. This catches many domestic shippers off guard. If your supply chain includes cross-border moves, every pallet in those shipments needs the IPPC stamp.

Failure to comply results in shipments being held at customs, fumigated at the port (at your expense), or returned to origin. The costs escalate quickly: port storage fees, treatment charges, delivery delays, and the downstream impact on your customer relationships.

How to Verify Compliance

Every ISPM-15 compliant pallet carries a branded mark — a wheat sheaf symbol alongside the country code, producer number, and treatment type. The mark must be legible and applied to at least two opposite sides of the pallet. If the mark is missing, faded beyond readability, or applied to only one side, the pallet may be rejected at the border.

When ordering from The Pallet Book, specify that you need heat-treated pallets for export. PalletMind automatically flags export-bound requests and ensures that only ISPM-15 certified suppliers are included in your match results. It is one of those details that is easy to overlook and expensive to get wrong — so we built the safeguard directly into the qualification process.