Here’s an article of interest that explains some misconceptions.
Historically, asbestos has been used as an ingredient in several different asphalt roofing products. In 1990, U.S. EPA published a notice in the Federal Register (55 FR 5144, Feb. 13, 1990) identifying products made with asbestos. The Asbestos NESHAP regulation lists the following asphalt roofing products as possibly containing asbestos (40 CFR 61 Subpart M, Appendix A):
• Built-up roofing
• Asphalt-containing single ply membrane systems
• Asphalt shingles
• Asphalt-containing underlayment felts
• Asphalt-containing roof coatings and mastics
• Asphalt-containing base flashings
In reality, while asbestos was commonly used in many asphalt roofing materials, asbestos was rarely used in the shingles themselves. 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. Manufacturer information on how many asbestos-containing shingles were sold is not available, but the amount of asbestos used in shingles was typically less than 1% {NESHAP defines ACM as any material containing more than 1% asbestos}. and it was only in a small portion of the manufacturers’ production. Unfortunately, less is known about the possible presence of asbestos in imported roofing coatings.
Because of concerns raised over the possible presence of asbestos in asphalt shingles, several shingle recyclers have done extensive testing to confirm that asbestos is not a concern. The Construction & Demolition Recycling Association (CDRA) has compiled (and continues to compile) a database of test results for asbestos in asphalt shingles. These test results come from facilities that recycle asphalt shingles and from exploratory testing. Individuals interested in the raw data should contact the CDRA. In addition, individuals with additional sampling data are greatly encouraged to share the results with the CDRA so the information can be posted on this webpage. CDRA is especially interested in analyses utilizing the transmission electron microscopy (TEM) method.

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Is there Asbestos in Asphalt Roofing Shingles?