Extrusion-coated structural systems having reinforced structural members

A method of making an extrusion-coated structural system, said method comprising:

• extrusion coating a coating material onto at least a portion of a first substrate to form an extrusion-coated structural member, wherein said first substrate defines at least one structural recess extending inwardly from an outer surface of said first substrate and a near-recess external surface adjacent said structural recess, wherein said near-recess external surface is formed of said coating material during said extrusion coating, wherein said extrusion coating includes applying said coating material to said structural recess so that the maximum thickness of said coating material within said structural recess is at least 2 times greater than the thickness of said coating material forming said near-recess external surface.