PVC vs metal z-flashing w/ 2″ foam

I recently toured a where the designers noted the use of PVC rather than metal z-flashing at the bottom of wall/sill area to reduce thermal bridging.  How important is this… I recently toured a where the designers noted the use of PVC rather than metal z-flashing at the bottom of wall/sill area to reduce thermal bridging.  How important is this…Read MoreGreenBuildingAdvisor