Georgia-Pacific is closing two plywood mills in a move which will leave more than 1,000 people without a job.
The plants closing are Hawthorne in Florida, where 400 workers are based, and a mill in Arkansas, where 700 people work.
The company said weak demand for homebuilding and refurbishment work had devastated the Hawthorne plywood mill over the past few years.
Production is due to stop on October 14.
