Does Johns Manville Fiberglass Insulation Contain Asbestos

The r value for mansville spintex was about 4 8 per inch before allowing for the effects of insulation gaps or material inconsistencies.

Does johns manville fiberglass insulation contain asbestos.

And reincorporated in 1926 as johns manville corporation. In 1886 charles manville ran manville covering company which produced asbestos pipe insulation and soon helped to sell henry ward johns products. What would be gained. Government mandates production of asbestos containing insulation products silica asbestos combination to insulate navy vessels and products for other war purposes.

Was asbestos added to fg. Block insulation 1940 1970 brick strip paper. To add a natural solid insulation to a manufactured fibrous insulation is nothing an. Manville personal injury settlement trust.

Asbestos in solid form sheets tapes and wraps is fireproof and a good thermal insulator. Like fiberglass it should be handled with care but it is not known to contain asbestos or pose any serious health risks. It is extremely rare to find asbestos related material within fibreglass insulation. From the johns manville spintex insulation citations we ve found to date the product refers to a mineral fiber or rock wool insulation not an asbestos material.

Its product line is now made with fiberglass and polyurethane. The young asbestos insulation industry enjoyed fantastic growth but the warning signs were already apparent. Calsilite block insulation 1947 1971 calsilite block insulation navy only. 352 insulating cement 1922 1973 85 magnesia block insulation 1902 1970 85 magnesia cement.

Johns manville company went on to become the largest manufacturer of asbestos products in the u s. What to do with suspicious insulation if your loose fill insulation fits the visual cues for vermiculite the first thing to do is to avoid disturbing it. The company has won awards for its formaldehyde free insulation too. Johns manville shifts into wartime production.

7m 13 raw asbestos fibers. However henry ward johns died in 1898 from what was believed to be asbestosis. I seriously doubt it. You will not find asbestos in any batt form of fibreglass insulation.

This is especially true in modern fibreglass material where the answer would be definitely not. Acquired johns manville in 2001 and today the company produces insulation and construction products without asbestos.