Does Asphalt Shingle Siding Contain Asbestos

Asbestos containing building siding identification history.

Does asphalt shingle siding contain asbestos. This document provides a photo guide and text for the identification of asbestos containing wall siding products like asphalt shingles asbestos cement siding shingles. Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos. Nonfriable means they cannot be broken up by hand pressure. The siding may also contain asbestos if it is old with a wood grain texture to resemble cedar.

If they look old they might have asbestos fibers in them. We include a history of asbestos cement siding roofing products. 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 or cement roofing and siding that contain asbestos when intact and in good condition are generally considered nonfriable and are not hazardous.

Roof shingles even if the material contained asbestos which it might are rarely the only nor even the principal source of problem levels of asbestos fibers in a building and i. 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. Determine when the shingles were installed on your roof. If you don t know the age of the shingles inspect them for wear.

In reality while asbestos was commonly used in many asphalt roofing materials asbestos was rarely used in the shingles themselves.