I call this kind of boat a pirogue. It is 12'x36"x35# and is built chine style in the middle and then the bottom planking is planed down thin enough so it can be rolled around in the ends to make a hollow forefoot and lap gains at the stems. The bottom planking is carved out so it is thick enough along where the chine log would be for the sides to be fastened just into the edge of the plank.

All our boats are built of tulip poplar (Liriodendron tulipfera) and this is the natural color of the wood. Poplar is the strongest, toughest wood for its weight in the world... almost as light as Atlantic white cedar and stronger than hard maple (80,000 psi). It is very stable, hard to split, flexible and... despite old taxpayer funded "studies" by the government, the heartwood of poplar is very rot resistant. It was the preferred wood for old hand dug wells because it is termite proof in contact with the soil. The oldest covered bridge in the country (Philippi, WV) was built entirely out of poplar including the sills which rest on the ground. I don't understand why more boat builders don't use it. It is stronger and cheaper than Okoume (or any other kind) of marine plywood.

Despite the fact that this little boat has some sapwood in the two bottom planks, it is still in good shape after many years. It is conventionally built and not epoxified and has had a lot of use. The owner keeps up that varnish job with sandpaper and varnish out of an aerosol can.