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Preliminary Affirmative Determination in the Antidumping Duty Investigation of Fiberglass Door Panels from the People's Republic of China

Preliminary Affirmative Determination in the Antidumping Duty Investigation of Fiberglass Door Panels from the People’s Republic of China

On January 16, 2026, the U.S. Department of Commerce (Commerce) announced its preliminary affirmative determination in the antidumping duty (AD) investigation of fiberglass door panels from the People’s Republic of China (China). 

Preliminary Dumping Margins

China

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. 68.9368.87
Wuxi Lutong Fiberglass Doors Co., Ltd. East Grace Corporation 68.9368.87
Dalian Capstone Engineering Co., Ltd.  Dalian Capstone Engineering Co., Ltd. 38.78  38.75 
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. 99.4999.40
Wuxi Lutong Fiberglass Door Co., Ltd. Wuxi Xinli New Material Co., Ltd. 68.9368.87
China-Wide Rate147.85* 147.82

*Rate based on facts available with adverse inferences.

Import Statistics

China202220232024
Volume (Units)9,091,083 8,494,080 9,639,663 
Value (USD)$110,282,468 $100,276,569 $145,652,424 

Source:  U.S. Census Bureau, accessed through S&P Global Trade Atlas (Harmonized Tariff Schedule of the United States (HTSUS) subheading 3925.20.0010). Imports of fiberglass door panels enter under this HTSUS subheading that may cover subject and non-subject merchandise. Therefore, publicly available import data may not accurately reflect actual imports of fiberglass door panels covered by the scope of the investigations. 

Next Steps

  • The final determinations of these AD investigations are currently scheduled to be announced on May 15, 2026.
  • Commerce is also conducting a concurrent countervailing duty (CVD) investigation of fiberglass door panels from China.
  • The U.S. International Trade Commission (ITC) is running a concurrent injury investigation. For more information related to the ITC’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 preliminary FAQs.
  • 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 the following case number A-570-209.
  • For more information on subsidy programs, please refer to the subsidies enforcement library.
  • To date, Commerce maintains 800 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.