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

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

On August 19, 2025, the U.S. Department of Commerce (Commerce) announced its preliminary affirmative determination in the countervailing duty (CVD) investigation of fiberglass door panels from the People’s Republic of China (China).

Preliminary Subsidy Rates

Exporter/ProducerSubsidy Rate (percent)
Dalian Capstone Engineering Co., Ltd.71.37
Jiangxi Fangda Tech Co., Ltd.59.17
Kits Glass (China) Limited921.42*
Hebei Charlotte Enterprise Co., Ltd.921.42*
Lily Industries Co., Ltd.921.42*
Shanghai Unikey International Trading921.42*
Zhejiang Kuchuan Door Co., Ltd921.42*
Zhenshi Group Huamei New Materials Co Ltd921.42*
All-Others62.55

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

Import Statistics 

China202220232024
Volume (Units)9,091,0838,494,0809,639,663
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 investigation.

Next Steps

  • The final determinations of these CVD investigation is aligned with the final determinations in the companion AD investigation, which is currently scheduled to be announced on December 31, 2025, unless postponed.
  • The U.S. International Trade Commission (ITC) is running concurrent injury determination investigations. 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 numbers:

    Trading PartnerCVD Case Number
    ChinaC-570-210
  • For more information on subsidy programs, please refer to the subsidies enforcement library.
  • To date, Commerce maintains 777 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.