Custom Panels, LLC. Company Information Ply-Trim Building Products is a leader in the lumber and building products industry, placing the highest priority on customer service and quality products. We strive to be your complete source for residential and commercial building products. PLY-TRIM BUILDING PRODUCTS, LLC. 550 North Meridian Road Youngstown, OH 44509 Toll Free 800-Ply-Trim (800.759.8746) Tel 330.799.7876 Fax 330.799.2908 MENU Home Duraboard Engineered Wood Engineered Stair Products Ply-Trim Exterior Trim Contact