to the lower edge 20 when stacked adjacently as shown in fig1 the interlocking panel 10 includes a fastener notch 22 the fastener notch 22 provides placement indicia to indicate where the fasteners should be placed when the lower edge 20 is placed on top of a corresponding top edge 18 of another plank the front face 14 of the lower edge 20 will cover the fastener notch 22 thus covering any evidence of an opening through the panel 10 and preserving the integrity of the barrier the fastener notch 22 may be routed in a u201c v u201d or u201c u u201d so the screw head sits slightly recessed when installed thereby allowing the next siding panel 10 to fit together easily without catching on the screw head in fig1 the front face of the lower edge 20 extends down a considerable amount but it is contemplated that this distance may be more or less as long as it still covers the fastener notch 22 of the next panel examples of fastener notches 22 are shown in fig1 a and fig1 b however other fastener notch 22 configurations may be used the interlocking panel 10 in fig1 can be made out of many different materials such as wood plastic cement or vinyl it is suggested.