# American Gypsum Company orders new Grenzebach wallboard line for Duke plant

American Gypsum Company has ordered a new wallboard production line from Grenzebach for its Duke, Oklahoma, plant, expanding capacity by 25% and reducing operating costs by 20%. Delivery is expected by mid-late 2027.

- Type: Expansion
- Announced: 2026-01-29
- Where: Duke, Oklahoma, United States
- Starts operating: Q3 2027
- Status: announced
- Capacity: 25% capacity increase
- Products: wallboard
- Sectors: [Construction Materials](https://endata.com/sectors/construction-materials.md)

## Companies

- [American Gypsum Company](https://endata.com/companies/51867.md)
- [Grenzebach Group](https://endata.com/companies/17928.md) (supplier)

## Sources

- [globalgypsum.com](https://www.globalgypsum.com/news/2471-american-gypsum-company-orders-new-grenzebach-wallboard-line-for-duke-plant), 2026-01-29: "The new line will expand the Duke plant’s capacity by 25%, while reducing its operating costs by 20%."

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