First post to this site. I am having an issue with duct insulation condensation which is not uncommon in Florida along the coastal areas. The ductwork is sheetmetal with R5 ductwrap about 24 years old. The sheetmetal portion is still in excellent condition with no leaks (per Florida Power and Light duct load test). Ductwork is located in the attic. The vapor barrier is showing aging signs where the scrim coat is oxidizing and breaking down but all in all the over all ductwork looks to be in very good condition. My question is this: Anyone ever apply a second layer of insulation where the first layer (old insulation) will have numerous holes to be poked through the vapor barrier first to in essence eliminate the old vapor barrier. Then apply the new or second layer of duct wrap insulation? Your input would greatly appreciated.