Johns Manville R-13 Wall Insulation

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