Current Johns Manville insulation does not have asbestos, it is asbestos-free and has been asbestos-free since late 1980s after company exited asbestos business following bankruptcy. Johns Manville, founded in 1858, was historically largest asbestos manufacturer in US, making asbestos insulation, roofing, and cement products from early 1900s to 1980s, which contained asbestos fibers that caused health issues like mesothelioma and led to Chapter 11 bankruptcy in 1982. After reorganization in 1988, Johns Manville stopped making asbestos products and now makes fiberglass insulation, mineral wool insulation, and other building products that are asbestos-free, with formaldehyde-free binder technology, made at plants like Defiance, Ohio, McPherson, Kansas, and Innisfail, Alberta, Canada. Modern Johns Manville fiberglass batts and rolls sold at Home Depot and Lowes are labeled asbestos-free and meet safety standards, made from recycled glass and sand. However, older Johns Manville insulation installed before 1980s may contain asbestos, especially loose-fill asbestos insulation or pipe insulation from mid-20th century, so if you have old Johns Manville insulation in older home built before 1980, it should be tested for asbestos by accredited lab before disturbing, and if asbestos present, handled by abatement professional. So current Johns Manville insulation does not have asbestos, but historical products did.
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