Does Asphalt Siding Have Asbestos. Their width can range from 12 to 48 inches. Asbestos siding is composed of asbestos fibers mixed with portland cement. Testing your siding for asbestos if your siding fits either of these descriptions you should consider having it tested.
Asbestos ranks high on the list of dangerous substances because of its toxic and carcinogenic properties when airborne. Their width can range from 12 to 48 inches.
Generally the product is made from wood fibers not asbestos see the insulating board msds data sheet quotations in the faq discussion just above.
If you suspect that your siding may contain asbestos there is no need for alarm. Some asphalt siding may contain asbestos in the asphalt impregnated felt backer or asbestos may also be in the asphalt impregnated paper tar paper or felt used as a house wrap under the siding. While older homes will likely contain asbestos in roofing insulation and tiles it can also be present in exterior siding. Paper like vapor barriers can present more of a hazard since they are considered friable.
