I made a strip plank kayak using common polystyrene, the blue stuff, my first kayak build. Also I have used the idea of the CLC Boats to divide the kayak in three parts. (http://www.clcboats.com/shop/boats/kaya ... kayak.html)

A kayak foundry plan, the plan was provided by my friend DelafluviuGuzi.

2 layers of 300 gram/square metric of fiberglass for the exterior hull, 1 layer for the deck.

The building with polystyrene is faster and easier. I had some wood but not enough so I was thinking why not polystyrene. I used hot glue. You can build the hull or the deck with strips of polystyrene in one day. It took me about 100-120 hours to build. With wood it takes maybe 300 hours.

The weight of the kayak is 22 kilos without any accessories. 546 centimeters long. 55 cm width.

It paddles great.

Images of the build:
https://plus.google.com/photos/117020649707486211092/albums/6066104030710950801?banner=pwa