Marine plywood was once the most popular material for boat construction by amateurs. it was knocked aside by ferro-cement, which thankfully did not hold. How to build a plywood boat. building your own plywood (stitch and glue) boat is a low cost and light weight alternative to spending $10,000+ on an expensive.  8′ puddle duck racer one design racing sailboat based on bolger brick. developmental class, defined hull, unlimited sail rig and underwater fins..