Air barrier, uninsulated – raised pier/beam house

100 year raised old house in hot humid south louisiana. Following several local publication, my preference would be to install 2” foil faced poly iso to bottom of joist. Cost… 100 year raised old house in hot humid south louisiana. Following several local publication, my preference would be to install 2” foil faced poly iso to bottom of joist. Cost…Read MoreGreenBuildingAdvisor