Attic Insulation

My vented attic is decked but uninsulated.  I want to install 8″ of Owens Corning 2″ x 4′ x 8′ styrofoam sheets x 4 on the attic deck.  Is there… My vented attic is decked but uninsulated.  I want to install 8″ of Owens Corning 2″ x 4′ x 8′ styrofoam sheets x 4 on the attic deck.  Is there…Read MoreGreenBuildingAdvisor