Insulation between levels in a split level home

Our 1970’s split level has fiberglass batts in the ceiling of the bottom level. The insulation is old, damaged and we suspect may be harboring some mildew, not to mention… Our 1970’s split level has fiberglass batts in the ceiling of the bottom level. The insulation is old, damaged and we suspect may be harboring some mildew, not to mention…Read MoreGreenBuildingAdvisor