What do they make at Johns Manville?

At Johns Manville, they make building products including insulation, roofing materials, and engineered products for residential, commercial, and industrial markets, with focus on energy efficiency and durability. Johns Manville makes fiberglass insulation, which is its largest product line, including formaldehyde-free fiberglass batts and rolls for walls, attics, and ceilings, blown-in fiberglass insulation for attics, and mineral wool insulation for fire resistance and soundproofing, made at plants in Defiance, Ohio, McPherson, Kansas, Scottsboro, Alabama, Etowah, Tennessee, and Innisfail, Alberta, Canada, sold at Home Depot and building supply stores. They make commercial roofing materials including TPO single-ply roofing membranes, EPDM rubber roofing, bitumen roofing, and polyiso insulation for flat roofs used on schools, warehouses, and hospitals. They also make engineered products including glass fibers for composites used in automotive and wind energy, filtration media for air and liquid filtration, and nonwoven fabrics. Historically, Johns Manville made asbestos products from 1858 to 1980s including asbestos insulation, cement, and roofing, which led to bankruptcy in 1982 due to health lawsuits, but now asbestos-free since reorganization. Today, Johns Manville makes sustainable building products with recycled content, owned by Berkshire Hathaway, with 40 plus plants worldwide, 7,000 employees, and revenue around 3.5 billion, known for insulation and roofing innovation.