Johns Manville R-23 TempControl Unfaced Mineral Wool Insulation Batts - All SizesZone States Zone 1 AL, CT, FL, GA, IL, LA, MA, MD, ME, NC, NH, OH, PA, SC, TN, VA Zone 2 IA, KS, MI, MN, MO, OK, TX, WI Zone 3 AR, CA, CO, MT, NM, NV, UT Size Sq Ft Bag Batts Bag R Value 5. 5 in x 15. 25 in x 47 in 25 5 R23 5. 5 in x 23 in x 47 in 37. 5 5 R23 Johns Manville Mineral Wool TempControl batts offer R Values up to R 30. Noncombustible, fire and moisture resistant, they are designed to deliver thermal control and delay the spread of fire in