2 in. x 16 in. x 4 ft. B-777 Roll

The Johns Manville B-777 Roll Formaldehyde-free unfaced insulation is ideal for small jobs like filling a gap in an attic or small space. Insulation is useful for moisture control in exterior walls, reduces sound transmission through walls, ceilings and floors, and can be used in a variety of wood-framed, engineered wood and steel frame construction applications, including new construction and retrofit.