JM State-of-the-Art Manufacturing to Have Starring Role. Johns Manville (JM), a global building products manufacturer and a Berkshire Hathaway company, will be featured in an episode of Office Spaces during its third season.
DENVER — Johns Manville (JM), a global building products manufacturer and a Berkshire Hathaway company, is celebrating five years of operation of its EPDM plant in Milan, Ohio. The plant officially opened in May 2012. The company plans to host a five-year celebration in July 2017 to highlight the plant’s success.
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The old three-tab shingles on the De Portola Middle School roof were deteriorating and dislodging. The transition point of the asphalt shingles to a low-slope, built-up roof was weakening and leaks were starting to occur.
JM continues to work on improving the packaging of our JM cover boards and insulation products. There are two packaging methods (plastic wrap or plastic bag) that are used depending upon the product and the manufacturing facility.