Johns Manville
Johns Manville (JM), a Berkshire Hathaway company, is a leading manufacturer and marketer of premium-quality products for building insulation, mechanical insulation, industrial insulation, commercial roofing and roof insulation, as well as fibers and nonwovens for commercial, industrial and residential applications. In business since 1858, the Denver-based company employs nearly 8,000 people and operates in 43 North American and European locations.
