Johns Manville R 30 Attic 88-sq ft Unfaced Fiberglass Batt Insulation Multi-Pack

Johns Manville Formaldehyde-free unfaced thermal and acoustical insulation offers R-Values up to R-49. It can be added to existing insulation in attics and ceilings. JM insulation is compression-packaged for space savings, and is offered in precut batts to fit standard cavities for both vertical and horizontal applications.