You may need a pdf reader to view some of the files on this page.
Asbestos roof material.
See epa s about pdf page to learn more.
Flat roofs often chose tar with gravel stones while pitched roofs used layered asphalt shingles.
It was one of the most used types of asbestos containing material for roof building mainly as an underlayment.
Asphalt tar paper this is probably the most prevalent acm asbestos containing material found when doing remodels for roofing projects.
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.
Cropp re sawing asbestos roofing felt jun.
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.
History of asbestos in roofing roofing materials widely varied as well.
Found as an underlayment for both pitched and flat roofing.
Manufacturers from about 1940 mid 1970 s used asbestos in the this base material.
The use of asbestos cement roof shingles was growing at a steady rate in the united states.