Abstract: A lightweight boat construction in which the main body is formed of top and bottom sheets of lightweight floatable plastic material. The sheets are configured externally to provide the desired external boat configuration when the sheets are superimposed and bonded. One of the bottom and top sheets is formed with a frame-receiving channel in the surface thereof contiguous the other sheet, and a PVC pipe frame is mounted in the channel for stabilizing and reinforcing the boat construction. The sheets with the embedded PVC frame are then bonded together to form the reinforced boat. Openings or recesses can be formed in the top sheets or both sheets to provide footwells, storage and battery compartments, and the like.