Asbestos Roof Material

Cropp re sawing asbestos roofing felt jun.

Asbestos roof material.

You may need a pdf reader to view some of the files on this page. Found as an underlayment for both pitched and flat roofing. The use of asbestos cement roof shingles was growing at a steady rate in the united states. Regardless of roof style almost all petroleum based roofing materials once contained deadly asbestos fibers.

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. 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. Flat roofs often chose tar with gravel stones while pitched roofs used layered asphalt shingles. Asbestos cement roofing is more likely to be a possible problem source of asbestos material if the roof is power washed or mechanically damaged such as by running a power saw through it during demolition or replacement.

It is black and pretty difficult to remove. Asphalt tar paper this is probably the most prevalent acm asbestos containing material found when doing remodels for roofing projects. Letters and guidance from the applicability determination index that clarify how the asbestos neshap applies to the removal of asbestos containing roofing material. History of asbestos in roofing roofing materials widely varied as well.