Johns Manville's mineral wool batts are made of inorganic fibers derived from basalt, a volcanic rock. Advanced manufacturing technology ensures consistent product quality, with high-fiber density and low shot content for excellent performance. These mine
- Made for exterior walls to help keep homes warm in the summer and cool in the winter
- Melting point of 2000°F helps delay the spread of fire
- Reduces noise traveling throughout the home
- Easy to cut and install
- Unfaced/without a vapor retarder - can be added to existing insulation
- Batts are pre-cut for use in standard 8-ft walls with 16-in on-center stud spacing
- JM is a partner of the Seal and Insulate with ENERGY STAR program