72 coupled thereto using fasteners 74 the fasteners 74 are further used to couple a polymeric bracket system 76 to the metal stud wall construction 70 an exterior cladding system includes composite panels 80 and 82 which are coupled to the polymeric bracket system 76 using brackets 81 and fasteners 84 the wall construction 70 and curtain wall system 60 are representative of assemblies that could be used with the present invention however they are not meant to limit the scope of the invention and are exemplary only as shown in fig3 the curtain wall system 60 the flashing strip 100 wall construction 70 and exterior cladding units 80 82 are all potentially exposed to an exterior environment a and an interior environment b along portions thereof the flashing unit 100 as shown in fig3 includes a polymeric core 130 surrounded by an interrupted exterior facing 132 the exterior facing 132 is contemplated to be comprised of a sheet metal material the exterior facing 132 is considered interrupted in that the exterior facing 132 includes a plurality of thermal breaks which are identified in fig3 as thermal breaks 140 a 140 f similar to the thermal breaks noted above thermal breaks 140 a 140 f are defined by spacings provided along the entirety of the exterior facing 132 of the flashing strip.