On March 20, 2025, American Fiberglass Door Coalition (“Petitioner”), filed a petition for the imposition of antidumping and countervailing duties on U.S. imports of fiberglass door panels from the People’s Republic of China.
SCOPE OF THE INVESTIGATION
The merchandise covered by this investigation consists of fiberglass door panels, including fiberglass sidelites, whether finished or unfinished, whether assembled or unassembled, whether pre-hung or included in an entry door system. The subject fiberglass door panels, including fiberglass sidelites, consist of at least one fiberglass skin, frames typically made of wood or composite stiles, bottom rails, and top rails, binding materials, including adhesives or fasteners, insulation foam, and may be assembled with glass. Subject merchandise includes fiberglass door panels and sidelites whether the door surface is painted or unpainted, contains or does not contain cut-outs for door components, or assembled or unassembled with glass lites in the door.
Fiberglass door panels and sidelites are covered by the investigation whether they are imported attached to, or in conjunction with door components and accessories (including but not limited to door jambs, door handles, locks, hinges, door stoppers, door kicks, door thresholds, and trim), in a pre-hung door system, or an entry door system. Subject fiberglass door panels and sidelites are covered whether they are accompanied by other parts. However, if a subject fiberglass door panel or sidelite is imported in a pre-hung door system or entry door system, only the fiberglass door panel and sidelite are covered by the scope.
Subject merchandise may be impact-rated to withstand hurricane force wind loads and may be reinforced with steel sheet or plate. Subject merchandise may be firerated for up to 90 minutes and may contain flame retardant composites but not limited to flame retardant foam or mineral core materials.
Subject merchandise also includes fiberglass door panels and sidelites that have been processed in a third country, including but not limited to one or more of the following: filling with insulation foam, trimming, cutting, notching, punching, drilling, painting, finishing, assembly, or any other processing that would not otherwise remove the merchandise from the scope of the investigation if performed in the country of manufacture of the in-scope product. The inclusion of other parts, such as door components and accessories (including but not limited to door jambs, door handles, locks, hinges, door stoppers, door kicks, door thresholds, and trim) in a third country does not remove the fiberglass door panels and sidelites from the scope.
Imports of subject merchandise are classified under Harmonized Tariff Schedule of the United States (HTSUS) statistical number 3925.20.0010. Subject merchandise may also be classified under 4418.29.4000, 4418.29.8030, 4418.29.8060, or 7019.90.51.50. The HTSUS subheadings are provided for convenience and customs purposes; the written description of the scope of these investigations is dispositive.
PETITIONERS
Therma-Tru
1750 Indian Wood Circle
Maumee, OH 43537
Phone: 1-(800) 843-7628
Email: privacy@thermatru.com
Website: www.thermatru.com
Plastpro
5200 Century Blvd.
Los Angeles, CA 90045
Phone: (800) 779-0561
Email: CUS-Support@plastproinc.com
Website: www.plastproinc.com
Masonite / Owens Corning
One Owens Corning Parkway
Toledo, OH
1001 East Palm Avenue
Tampa, FL 33605
Phone: 1(800) GET-PINK
Phone: (813)877-2726
Phone: (800) 895-2723
Email: amber.wohlfarth@owenscorning.com; dyland.rosen@owenscorning.com; william.sparrow@owenscorning.com; Sandra.miller@owenscorning.com
Website: www.masonite.com / www.owenscorning.com/en-us
COUNSEL FOR PETITIONER
Timothy C. Brightbill
Robert E. DeFrancesco, III
Derick G. Holt
Kimberly A. Reynolds
Jacob M. Garten
WILEY REIN LLP
2050 M Street, NW
Washington, DC 20036
(202) 719-7000
NAMED PRODUCERS/EXPORTERS
For a list of foreign producers/exporters alleged by Petitioner, please see Attachment I.
NAMED IMPORTERS
For a list of importers alleged by Petitioner, please see Attachment II.
ESTIMATED SCHEDULE
Below is an estimated schedule. Please note that Commerce deadlines are likely to be extended for the AD investigation as authorized by statute.
| Event | Earliest Date | Extended Date |
| Petition Filed | March 20, 2025 | |
| DOC Initiation | April 9, 2025 | |
| ITC Preliminary Investigation: | ||
| Questionnaires Due | April 3, 2025 | |
| Request to appear at hearing | April 8, 2025 | |
| Hearing | April 10, 2025 | |
| Briefs | April 15, 2025 | |
| ITC Vote | May 4, 2025 | |
| DOC Investigation Schedule: | ||
| DOC Preliminary Antidumping Determination | August 27, 2025 | October 16, 2025 |
| DOC Final Antidumping Determination | November 10, 2025 | February 28, 2026 |
| DOC Preliminary Countervailing Determination | June 13, 2025 | August 17, 2025 |
| DOC Final Countervailing Determination | August 27, 2025 | October 31, 2025 |
| ITC Final Investigation: | ||
| ITC Final AD Determination | December 25, 2025 | April 14, 2026 |
| ITC Final CVD Determination | October 11, 2025 | December 15, 2025 |
ALLEGED DUMPING MARGINS
China : 198.77%
ALLEGED COUNTERVAILING DUTY MARGINS
Above de minimis.
IMPORTS OF SUBJECT MERCHANDISE
| 2022 | 2023 | 2024 | |
| U.S. Imports from: | |||
| China | |||
| Quantity (Units) | 9,091,083 | 8,494,080 | 9,639,663 |
| Quantity (kg) | 43,714,503 | 43,712,290 | 65,086,110 |
| LDPV | $140,486,555 | $122,233,902 | $177,614,606 |
| Unit Value ($/unit) | $15.45 | $14.39 | $18.43 |
| Unit Value ($/kg) | $3.21 | $2.80 | $2.73 |
ALLEGED SUBSIDIES
For a list of alleged subsidies the Petitioner, please see Attachment III.
CONTACT US For more information concerning this petition and how it may affect your business, please contact Nithya Nagarajan, Dan Wilson, or Stephen Brophy.