# Eagle Materials to expand gypsum wallboard plant in Duke, Oklahoma

Eagle Materials Inc., through its subsidiary American Gypsum Company, plans to expand and modernize its gypsum wallboard plant in Duke, Oklahoma. The $330 million project will increase capacity by 300 million square feet (25%) to 1.5 billion square feet, reduce operating costs by nearly 20%, and is scheduled for startup in the second half of 2027.

- Type: Expansion
- Announced: 2025-05-16
- Where: Duke, Oklahoma, United States
- Value: $330.0M
- Starts operating: Q3 2027
- Status: announced
- Capacity: 1.5 billion square feet per year
- Products: gypsum wallboard
- Sectors: [Construction Materials](https://endata.com/sectors/construction-materials.md)

## Companies

- [Eagle Materials](https://endata.com/companies/22162.md)
- [American Gypsum Company](https://endata.com/companies/51867.md) (partner)

## Sources

- [ir.eaglematerials.com](https://ir.eaglematerials.com/news-releases/news-release-details/eagle-materials-announces-plans-modernize-and-expand-its-gypsum), 2025-05-16: "The project will expand American Gypsum's ability to serve customers in high-growth markets and enhance its low-cost producer position in the wallboard industry."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.