Georgia Pacific Gypsum in Fort Dodge is laying off 29 workers from one of its three wallboard production shifts. The reason is due to the continued weak demand for building materials. Georgia Pacific officials will re-evaluate the layoffs if market conditions change.

There are two shifts that currently produce a line of gypsum products at the Fort Dodge facility. The plant had about 145 workers in recent years. It has been in operation since the early 1900s.