The most accessible techniques for do-it-yourself boat builders involves using wood. It is possible for someone who wants a Fiber Reinforced Plastic (FRP) kayak for example a fiberglass or Kevlar kayak to make one at home, but you will first have to go through most of the steps of building a wooden boat, so it is time consuming to build your first.
Wood can be worked with commonly available tools, is readily available in most areas and is structurally one of the best boat building materials available. Not because it floats, but because it is lightweight and very strong for it weight. Read more about the process below: