32 for the flashing strip 10 which is an exterior shell having thermal breaks as further described below collectively the exterior surfaces or skins of the flashing strip 10 are generally comprised of sheet metal made from lead aluminum copper galvanized steel stainless steel zinc alloy or lead coated copper other sheet metal substrates are also contemplated for use with the present invention the metal surfaces provide the malleability strength and durability necessary to prolong the life of the flashing strip 10 however in known flashing devices a continuous or uninterrupted flashing made from a sheet metal material is known to cause thermal bridging from outside environmental conditions to the interior or wall construction of a building to counter these thermal bridging effects the flashing strip 10 of the present invention includes thermal breaks disposed on the panel portions 12 14 and 16 of the flashing strip 10 referring now to fig1 and 2 the flashing strip 10 is shown having a polymeric core 30 disposed within the exterior facing 32 defined by interior and exterior surfaces 18 20 22 24 26 28 and 29 of the panels 12 14 and 16 in the embodiment shown in fig1 and 2 interior panel portion 12 is a generally upright panel portion and includes interior metal surface 18 and exterior metal surface 20 having a polymeric core portion 30 a disposed there between similarly generally horizontal or downwardly sloping web or body panel portion 14 includes a polymeric core portion 30 b disposed between interior metal surface 24 and exterior metal surface.