Does Asphalt Siding Have Asbestos In It

Asbestos cement is a mixture of portland cement reinforced with asbestos fibers.

Does asphalt siding have asbestos in it.

Asphalt or cement roofing and siding that contain asbestos when intact and in good condition are generally considered nonfriable and are not hazardous. Look to see what kind of shingles you have. Asbestos siding is composed of asbestos fibers mixed with portland cement. Roofing adhesives roofing felt and base flashing also might include asbestos.

Do you know the fancy name they gave this style of siding. Testing your siding for asbestos. Asbestos ranks high on the list of dangerous substances because of its toxic and carcinogenic properties when airborne. Siding asphalt shingle or sheet shows both asphalt based and asphalt combined with fiberboard based mineral granule covered shingle siding in various forms.

The portland cement binds asbestos fibers into a hard mass. In both cases as both products may contain asbestos removing this siding will add cost to your renovation job. 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. If you suspect that your siding may contain asbestos there is no need for alarm.

Some asphalt roof shingle products and therefore quite possibly some asphalt siding products did indeed contain asbestos fibers in their substrate or coating. While older homes will likely contain asbestos in roofing insulation and tiles it can also be present in exterior siding. Most homes have asphalt shingles and asbestos is more common in asphalt shingles. Below is an example.

A brief history of asbestos cement siding. Not sure if the old asphalt siding has asbestos. I must have been when they put it on in the 30 s. Either treat the material as presumed to contain asbestos or have a sample tested.

The siding may also contain asbestos if it is old with a wood grain texture to resemble cedar. If your siding fits either of these descriptions you should consider having it tested. Asbestos cement was first developed in 1905 by the johns manville company who became one of the premier manufacturers of cement asbestos materials. Nonfriable means they cannot be broken up by hand pressure.