Asbestos Roof Material

Flat roofs often chose tar with gravel stones while pitched roofs used layered asphalt shingles.

Asbestos roof material.

Found as an underlayment for both pitched and flat roofing. Asphalt tar paper this is probably the most prevalent acm asbestos containing material found when doing remodels for roofing projects. History of asbestos in roofing roofing materials widely varied as well. Regardless of roof style almost all petroleum based roofing materials once contained deadly asbestos fibers.

Letters and guidance from the applicability determination index that clarify how the asbestos neshap applies to the removal of asbestos containing roofing material. Manufacturers from about 1940 mid 1970 s used asbestos in the this base material. It was one of the most used types of asbestos containing material for roof building mainly as an underlayment. It is made of a mix of cement and asbestos fibers and as the majority of the materials which contain asbestos it is only dangerous when damaged and in poor condition.

You may need a pdf reader to view some of the files on this page. In the early 1920s american roofing material manufacturers johns mansville carey eternit and century were all offering at least one asbestos cement roofing shingle to their customers. The use of asbestos cement roof shingles was growing at a steady rate in the united states. It is black and pretty difficult to remove.