ROSEVILLE, CA -- SierraPine plans to shut down one of its two MDF production lines at its Rocklin, CA, mill on Dec. 15, resulting in the layoffs of 51 workers.

The company cited the continued sluggish housing market, more competition and increased state regulations as factors in its decision, according to the Sacramento Business Journal.

The Rocklin plant, nestled in the foothills of the Sierra Nevada Mountains, specializes in thin MDF for products such as doorskins and cabinet and furniture components.

The SierraPine MDF plant experienced a fire to its air scrubber unit on June 2.

SierraPine also operates an MDF mill in Medford, OR; and particleboard mills in Adel, GA, Martell, CA; and Springfield, OR.