EU Phytosanitary Rules for Oak and Chestnut: What Canadian Exporters Need to File Before October 15, 2026

The rule

Effective October 15, 2026, oak and chestnut wood originating in Canada and shipped to any EU member state must meet two phytosanitary conditions: bark-free and heat-treated to a minimum core temperature of 56°C for at least 30 consecutive minutes. The scope includes logs, sawn lumber, and any wood product exceeding 6 mm thickness. Threshold applies at the thickest cross-section, not average dimension.

This replaces the interim regime CFIA has been administering since mid-2024. The trigger is Agrilus bilineatus, the two-lined chestnut borer, which the EU classified as a quarantine pest in 2022. Canada and the United States are both origin countries under the directive.

What changes

Previous requirements allowed bark-present lumber if it was kiln-dried and accompanied by a phytosanitary certificate. The new rule removes that pathway. If you ship oak or chestnut lumber to Rotterdam, Antwerp, Hamburg, or any EU port after October 15, 2026, it must be debarked and heat-treated, regardless of kiln schedules or moisture content.

CFIA phytosanitary certificates issued under the old standard will not clear EU customs after the cutoff. If you have October shipments in the pipeline, confirm your mill’s treatment protocol now. The certificate must reference the heat-treatment parameters and debarking method. Generic ISPM 15 heat-treatment stamps do not satisfy the directive unless the certificate explicitly ties the stamp to the consignment and confirms bark removal.

Filing on the Canadian side

Export filings for wood products fall under CFIA jurisdiction, not CBSA. You request the phytosanitary certificate through CFIA’s My CFIA portal, referencing the EU’s Implementing Regulation 2026/XXX (final number pending gazette publication). The certificate must be issued before the goods leave Canadian soil. If your mill is not CFIA-registered as a treatment facility, that registration must happen first. CFIA’s average turnaround for new facility audits is eight to twelve weeks, longer in Q4.

If you export finished goods (furniture, cabinetry, flooring) that incorporate oak or chestnut components, the directive applies if any piece of wood in the shipment exceeds 6 mm thickness. Mixed-species products require segregated documentation. CFIA does not issue blanket certificates for composite goods. Each oak or chestnut component must trace back to a certified heat-treatment lot.

HS classification watch

Oak and chestnut lumber typically classifies under HS 4407 (sawn wood), 4403 (logs), or 4412 (plywood, if veneer core exceeds 6 mm). If your current CAD filings list wood products under a basket heading without species breakout, EU importers will ask you to refine the commercial invoice. Customs authorities in the EU tie phytosanitary compliance to the HS code and country of origin on the entry declaration. Vague product descriptions (“hardwood lumber, mixed species”) will trigger holds at the EU port of entry, and the cost of re-export or destruction sits with the shipper under Incoterms DDP or the consignee under DAP.

If you need help confirming which HS code applies to your wood products on the Canadian export side or how classification disputes play out when EU importers file under TARIC codes, our classification desk works both directions.

Practical timing

October 15, 2026 is the EU enforcement date. CFIA will start issuing certificates under the new standard on or around July 1, 2026, once the directive is published in the EU Official Journal and incorporated into CFIA’s export manual. If you have Q3 or Q4 2026 purchase orders from EU buyers, include a clause requiring compliance with the final phytosanitary directive. Buyers will not accept shipments that clear Canadian export inspection but fail EU import inspection.

If your mill does not currently heat-treat, retrofitting a kiln chamber to hit 56°C core temp with data-logger verification costs CAD 80,000 to CAD 150,000 depending on chamber size. Lead time for industrial kiln equipment is four to six months. Mills that defer the capital spend until summer 2026 will not be ready in time for fall shipments.

Reverse logistics if it goes wrong

If a container of oak lumber arrives at an EU port without compliant phytosanitary certification, the consignee has three options: re-export to Canada (shipper pays freight both ways plus EU port demurrage), treat in-country at an EU-approved facility (rare, expensive, requires finding a licensed operator willing to handle the lot), or destroy under customs supervision (total loss, shipper liability under most contracts).

Canadian exporters do not have a drawback or remission path for goods rejected at an EU port. CBSA’s duty relief programs apply to Canadian imports, not outbound exports. If you eat the loss on a rejected shipment, the only recovery is a claim against your freight or trade credit insurer, and most policies exclude phytosanitary non-compliance unless you pre-disclosed the treatment gap.

Downstream supply-chain check

If you import finished goods into Canada that contain EU-origin oak or chestnut components and those goods move in and out of the EU during production (example: raw Canadian oak exported to Poland, machined into flooring, re-imported to Canada as finished product), the phytosanitary certificate must travel with the goods at every leg. When you file the CAD for re-import, CBSA does not verify phytosanitary compliance on finished wood products unless CFIA flags the shipment under a parallel import alert. But if your Polish supplier sources raw lumber from Canada without the correct treatment documentation, their EU import will fail, your production schedule breaks, and your next Canada-bound container sits in Gdansk waiting for substitute material.

The intersection of export phytosanitary compliance, CUSMA or CETA origin claims, and tariff treatment on re-import is messy enough that a customs audit will surface it if your commercial invoices do not tie treatment certificates to HS line items. CBSA does not care about EU phytosanitary rules when you import into Canada, but CRA will disallow preferential duty treatment under CUSMA if your origin documentation references non-compliant raw material sourcing.

What to do now

If you export oak or chestnut lumber or logs to the EU, contact your mill and confirm heat-treatment and debarking capability before June 2026. If you rely on third-party treatment (toll processing, contract kilns), get written confirmation that they will meet the 56°C / 30-minute / bark-free standard and provide data-logger records for each lot. CFIA will not issue the certificate without proof.

If you import EU-finished wood products that rely on Canadian raw material, ask your supplier how they plan to handle the October 15 cutoff. If they wait until September to figure it out, your November and December shipments will be late.

If your goods touch a consolidation warehouse between the mill and the port, make sure the warehouse operator knows that heat-treated certified lumber cannot be co-mingled with non-certified stock. CFIA lot traceability requires clean segregation from kiln to container.

We run export filings and phytosanitary certificate coordination for Canadian lumber and wood product exporters. If you need to map your current mill certifications against the new EU requirements, talk to us.

Source: CSCB