Tube and core and protective packaging products face minimum 6.5% increase from July 13.
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Converted products also see 7% rise as strong mill utilization and inflation drive costs higher.
The proposal keeps an exemption process and sets July deadlines, while the determination cites illegal logging and timber laundering as factors that distort wood-product pricing.
The U.S. posts the steepest decline among the largest softwood lumber import markets, followed by Germany and China, while supplier volumes fall most for Canada, Russia, and Austria.
Canadian import taxes reach about 45% for many producers supplying U.S. builders.
Japan became the largest destination after U.S. duties hit Indonesia’s shipments.
Lumber prices rose from late-2025 lows, but duty deposits and reduced operating days continued to pressure liquidity and volumes.
Higher lumber prices lifted results, but logistics constraints cut shipments and increased inventories.
Expedited first five-year review finds dumping would likely continue if the order was revoked, with weighted-average dumping margins up to 231.60% for imports from China.
The reviews cover Canadian softwood lumber and uncoated paper from Brazil and Portugal, and list the companies subject to review.