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Final Affirmative Determination in the Antidumping and Countervailing Duty Investigations of Fiberglass Door Panels from China

Final Affirmative Determinations in the Antidumping and Countervailing Duty Investigations of Fiberglass Door Panels from the People’s Republic of China

On June 10, 2026, the U.S. Department of Commerce (Commerce) announced its final affirmative determinations in the antidumping duty (AD) and countervailing duty (CVD) investigations of fiberglass door panels from the People’s Republic of China (China).

Final Dumping Rates

ProducerExporterWeighted-Average Dumping Margin (Percent) Cash Deposit Rate (Adjusted for Subsidy Offsets) (percent) 
Anhui Xinyu Fiberglass Door Co., Ltd. Anhui Xinyu Fiberglass Door Co., Ltd. 73.0772.94
Wuxi Lutong Fiberglass Doors Co., Ltd. East Grace Corporation 73.0772.94
Dalian Capstone Engineering Co., Ltd.  Dalian Capstone Engineering Co., Ltd. 41.82  41.79
Jiangxi Fangda Tech Co., Ltd./Jiangxi Hangda Tech Co., Ltd./Jiangxi Onda Tech Co., Ltd. Jiangxi Fangda Tech Co., Ltd./Jiangxi Hangda Tech Co., Ltd./Jiangxi Onda Tech Co., Ltd. 104.31104.08
Wuxi Lutong Fiberglass Door Co., Ltd. Wuxi Xinli New Material Co., Ltd. 73.0772.94
China-Wide Rate147.85* 147.82

*Rate based on facts available with adverse inferences.

Final Subsidy Rates

Exporter/ProducerSubsidy Rate (percent)
Dalian Capstone Engineering Co., Ltd.66.22
Jiangxi Fangda Tech Co., Ltd.58.50
Kits Glass (China) Limited186.46*
Hebei Charlotte Enterprise Co., Ltd.186.46*
Lily Industries Co., Ltd.186.46*
Shanghai Unikey International Trading186.46*
Zhejiang Kuchuan Door Co., Ltd186.46*
Zhenshi Group Huamei New Materials Co Ltd186.46*
All-Others60.64

*This rate is based on facts available with adverse inferences.

Next Steps 

  • The International Trade Commission (ITC) is running concurrent injury determination investigations. For more information related to the International Trade Commission’s timeline, please refer to the ITC’s calendar.

Other Case Information

  • The petitioner is the American Fiberglass Door Coalition, which consists of Therma-Tru Corporation (Maumee, OH); PlastPro Doors Inc. (Los Angeles, CA); and Masonite/Owens Corning (Tampa, FL).
  • For general information and next steps, please refer to a list of FAQs for the final determination.
  • Additional case information, including the scope of the investigations, is on file electronically via Enforcement and Compliance’s Antidumping and Countervailing Duty Centralized Electronic Service System (ACCESS). Once you log in, please refer to case number A-570-209 for the AD investigation and C-570-210 for the CVD investigation.
  • To date, Commerce maintains 834 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.

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