The gunwales are laminated from 1/4 inch plywood strips 1.5 inches tall inner and 2 inches outer. The outer and inner gunwales each have three layers of plywood and the hull for a total thickness of 1.75 inches. The seams are off-set at each lamination by at least 12 inches and butt-jointed. The assembly is first wet out with straight epoxy and then laminated with epoxy and 406 thickener. I typically wait two days to pull off the clamps and do the other side. Next step is to sand, round over the edges, and apply 6oz cloth over the lamination. For attachment points, I oversize drill through the gunwale, fill with thick epoxy and re-drill the hole for 1/4 inch rope tie downs.