20 when stacked adjacently fig4 is yet another variation of an interlocking panel 10 that is very similar to fig3 the difference between fig4 and fig3 is the top edge 18 and lower edge 20 profiles fig5 is another variation of an interlocking panel 10 in which there are several cut outs 31 in the body 12 thus saving on materials and providing an alternative design in fig5 there are two cut outs in a generally oval shape but the cut outs may be in any shape and can be in various numbers fig6 shows further how in the inner portion of the panel 10 may be composed of a different material than the outer portion as discussed previously the inner material may be composed of a waste material recycled material or any material that is more economical the multilayer panel 10 in fig6 may be formed using a multilayer extrusion process fig7 shows the starter strip 30 that may be used as the base upon which adjacent panels 10 may be stacked the starter strip 30 contains a body 32 with a front face 34 and a rear face 36 similar to the panel 10 the starter strip 30 is smaller than the panels and is sturdy enough to stabilize the first panel so the others may follow the starter strip 30 also contains a.