Until the 1980s in the US, asbestos was a popular material in industrial, commercial and construction applications. Asbestos typically found its way into homes and workplaces during construction or renovation, when asbestos-containing products such as floor tiles or roofing felt were installed. These products remained popular for many decades because they were cheap, made from easily-acquired materials and minerals, and had beneficial fire-retardant properties. To demonstrate the heat resistant properties of its roofing materials, Johns-Manville promoted this blow torch test. Johns-Manville Corporation was founded in 1858 as the HW Johns Manufacturing Company of New York, NY and was based on the principle uses of asbestos as fire resistant roofing material. In 1886 the inception of the Manville Covering Company of Milwaukee, Wisconsin was founded on the principle uses of asbestos as a heat insulating material. In 1901 HW Johns Manufacturing Company and Manville Pipe Covering Company merged to form HW Johns-Manville Company of New York, NY The company was reincorporated as Johns-Manville Corporation in 1926. Between 1900 and the mid 1980s, asbestos was used in over 3000 different products. During the 20th century, more than 30 million tons of asbestos were used in industrial facilities, homes, schools, shipyards, steel mills, power plants and commercial buildings in the United States. Asbestos is term used to describe six naturally occurring minerals with similar ...
Orignal From: Blow Torch Test on Asbestos Roofing 1930
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