It was a popular additive to various housing materials from the 1920 s to the 1960 s.
Do asphalt siding shingles contain asbestos.
Asbestos is a popular material that has been used to reinforce concrete shingles.
Manufactured from a mix of asbestos fibers and hydraulic cement asbestos cement roof shingles were rigid durable and fireproof.
The national emissions standards for hazardous air pollutants neshap identifies several asphalt containing roofing products that may also contain asbestos including.
Look to see what kind of shingles you have.
It comes in the form of fiber and has a high fire retardant property which serves as a good reinforcement for concrete.
Roofing adhesives roofing felt and base flashing also might include asbestos.
They would not warp or rot and were resistant to damage caused by insects.
Some asphalt roof shingle products and therefore quite possibly some asphalt siding products did indeed contain asbestos fibers in their substrate or coating.
It is acknowledged by the asphalt shingle manufacturers that between 1963 and the mid 1970s some manufacturers did use asbestos in the fiber mat of shingles.
Asphalt containing base flashings in reality while asbestos was commonly used in many asphalt roofing materials asbestos was rarely used in the shingles themselves.
The siding may also contain asbestos if it is old with a wood grain texture to resemble cedar.
These shingles are generally 12 by 24 inches and the bottom tends to have a wave like pattern though that is not always the case.