Manville Roofing Systems

Johns Manville, a Berkshire Hathaway firm (NYSE: BRK. A, BRK. B) is a leading manufacturer and marketer of premium-quality products for building insulation, mechanical insulation, commercial roofing, and roof insulation, as well as fibers and nonwovens for industrial, commercial and domestic applications. JM serves markets that include aerospace, automotive and transportation, air handling, appliance, HVAC, pipe and equipment, filtration, waterproofing, building, flooring, interiors, and wind energy.