U.S. Moves Forward in Trade Case on Fiberglass Door Panels From China
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The United States International Trade Commission (USITC) has scheduled the final phase of antidumping and countervailing duty investigations on fiberglass door panels from China. These actions are being taken under the Tariff Act of 1930.
The Department of Commerce has made preliminary findings. These findings state that fiberglass door panels from China are being sold in the U.S. at less-than-fair-value. The products are also believed to be receiving unfair subsidies from the Chinese government.
The investigations are in response to petitions filed on March 20, 2025. The petitions came from the American Fiberglass Door Coalition. The coalition includes three companies: Therma-Tru Corporation based in Maumee, Ohio; PlastPro Doors Inc. from Los Angeles, California; and Owens Corning from Toledo, Ohio.
The product under investigation includes fiberglass door panels and sidelites. The panels may be finished or unfinished, painted or unpainted, and may include glass or insulation materials. These products are made with fiberglass skins and may feature wood or composite frames, adhesives, and fasteners.
The country of origin is determined by where the fiberglass door skin is pressed. Even if the fiberglass doors are altered in a third country—such as being painted or trimmed—if the skin was pressed in China, the product remains within the scope of the investigation.
Products covered by other existing orders are excluded. These include wood mouldings and millwork products from China and float glass products from China and Malaysia.
Imports of the subject merchandise are currently classified under tariff code 3925.20.0010. They may also fall under codes 4418.29.4000, 4418.29.8030, 4418.29.8060, or 7019.90.5150. However, the written description of the goods determines the investigation scope, not just the classification code.
The USITC will hold a hearing on June 9, 2026, at 9:30 a.m. Requests to appear must be submitted by June 3, 2026. Participation may include videoconferencing if justified. A prehearing conference, if necessary, will be held on June 5, 2026, at 9:30 a.m.
All testimony and presentation slides must be submitted by noon on June 8, 2026. Prehearing briefs are due by June 1, 2026. Posthearing briefs must be filed by June 16, 2026. Final party comments on new information are due July 6, 2026.
The USITC will place its staff report in the nonpublic record on May 21, 2026. A public version of the report will be released after that date.
All filings must be made through the USITC’s Electronic Document Information System (EDIS) and must comply with commission rules. No in-person paper filings will be accepted.
Only parties listed on the service list may file business proprietary information under an Administrative Protective Order (APO). Applications for access must be filed 21 days before the hearing.
For questions, contact Tyler Berard at 202-205-3354. Additional information is available at www.usitc.gov or through the commission’s electronic docket at https://edis.usitc.gov.
This investigation will determine whether imports of fiberglass door panels from China are harming U.S. industries.
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