A method and apparatus for assessing the cure status of a fibrous blanket manufactured with mineral fibers and binder is disclosed and comprises using continuous thermal measurement as an assessment of cure status. A plurality of thermocouples are installed in various oven locations both above and below the path of the fibrous pack to be cured and readings from the thermocouples are compared by a processor. The thermal measurements may be inlet or outlet temperatures of any particular zone or series of zones; or entry or egress temperatures; or averages or differences of measurements from selected thermocouple locations.