Come rain, snow, sleet, hail, and even fire, Johns Manville (JM) keeps its customers protected from the elements. Founded in 1858, JM makes commercial and industrial roofing systems and formaldehyde-free fiberglass insulation for the commercial and residential building industries. It also manufactures residential building insulation and specialty insulation for the aerospace, transportation, acoustics, appliance, and HVAC industries. Other items include fire-protection systems, thermal and acoustical insulation, glass textile wall coverings, and fibers and non-woven mats used in roofing and flooring. JM operates more than 40 plants in China, Europe, and North America. Warren Buffett's Berkshire Hathaway owns JM.