R11 Kraft Batt Fiberglass Insulation, 3-1/2 In. Thick, 23″x93″ – Johns Manville por | ago 6, 2026Why Johns Manville?. Designed for standard 2×4 wood stud wall cavities, these 23″-wide batts fit snugly between studs spaced 24″ on center. Floors and crawl spaces.
