Otter-Tech, Inc. produces Amish-built metal roofing, underdecking, and other roofing materials for contractors and serious do-it-yourselfers. Headquartered just outside of Harrisburg, Pennsylvania in Loysville, Pennsylvania, Otter-Tech services areas that include: New Bloomfield, PA Duncannon, PA Marysville, PA Perry County, PA Enola, PA Carlisle, PA Newport, PA Mifflintown, PA Juniata, PA Newville, PA Camp Hill, PA Shippensburg, PA Dillsburg, PA Halifax, PA Dauphin, PA Millersburg, PA Hershey, PA Blain, PA