The use of asbestos cement roof shingles was growing at a steady rate in the united states.
Asbestos roof material.
Regardless of roof style almost all petroleum based roofing materials once contained deadly asbestos fibers.
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.
Found as an underlayment for both pitched and flat roofing.
Flat roofs often chose tar with gravel stones while pitched roofs used layered asphalt shingles.
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It was one of the most used types of asbestos containing material for roof building mainly as an underlayment.
Manufacturers from about 1940 mid 1970 s used asbestos in the this base material.
History of asbestos in roofing roofing materials widely varied as well.
Letters and guidance from the applicability determination index that clarify how the asbestos neshap applies to the removal of asbestos containing roofing material.
Cropp re sawing asbestos roofing felt jun.
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.
See epa s about pdf page to learn more.