My son and i built this simple one sheet plywood boat following the plans and sage advice provided in the following link http://blog.makezine.com/archive/2011/07/the. Materials & tools: all the designs call for marine plywood, 1/4" for the hull and 1/2" for the bottom (except 3/8" for 10′ mini). scarfing the plywood will be needed.. Free plans for stitch and glue boatbuilding. many good free plywood contruction stitch and glue boat plan. stitch and glue plans are good wooden boat plans for beginners..