Asbestos Siding And Asphalt Shingles House

The portland cement binds asbestos fibers into a hard mass.

Asbestos siding and asphalt shingles house.

Asphalt or cement roofing and siding that contain asbestos when intact and in good condition are generally considered nonfriable and are not hazardous. Asphalt siding material was made in two common versions one much like asphalt roof shingles but in larger sheets right side of the building photo near the top of this article and the other was comprised of an asphalt coating laminated to hardboard siding material or laminated to a softer wood based insulating board panel often sold as. Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos. Let the siding dry then prime and paint with the best exterior latex you can find.

In the early 1920s american roofing material manufacturers johns mansville carey eternit and century were all offering at least one asbestos cement roofing shingle to their customers. Lead paint wasn t outlawed until 1978 so it s sure to be present on siding going back to the 1950s. The use of asbestos cement roof shingles was growing at a steady rate in the united states. Asbestos shingles are relatively strong but.

The use of asbestos siding shingles was a popular one that was used in the us from the early part of the 20th century until the 1970s. The siding was made by combining cement with asbestos which is a naturally occurring mineral that is fibrous in nature and fireproof. Do not throw or drop removed asbestos siding. Covering old asbestos shingles with new siding may seem like an option too but it s not easy to do safely.

Asbestos cement was first developed in 1905 by the johns manville company who became one of the premier manufacturers of cement asbestos materials. Determine when the shingles were installed on your roof. Nonfriable means they cannot be broken up by hand pressure. Work from the top down removing the snails to keep from breaking the asbestos siding.

A brief history of asbestos cement siding. State permits are often required of contractors for the removal of asbestos containing asphalt bituminous roofing products and asbestos cement shingles panels under the following conditions. Wrap asbestos siding in 6 mil thick plastic sheeting and secure the plastic with duct tape or place the debris in heavy duty plastic bags. If you don t know the age of the shingles inspect them for wear.

Photo guide to cement asbestos wall shingles or siding products. This is the wavy edge asbestos cement shingle siding product. Asbestos cement is a mixture of portland cement reinforced with asbestos fibers.