The present invention is a vinyl siding panel and a method of making the vinyl siding panel. One embodiment of the vinyl siding panel comprises a planar row extending the longitudinal length of the vinyl siding panel. The siding panel may also have a slightly curved row. A reinforcement panel may be secured to the siding panel. In such case, the slightly curved row of siding may be secured to a planar portion of the reinforcement panel. In addition, an intermediate portion of the siding panel may be thicker than the outer portions of the siding panel.