Difference Between Asbestos Siding And Shingles

Asbestos cement was first developed in 1905 by the johns manville company who became one of the premier manufacturers of cement asbestos materials.

Difference between asbestos siding and shingles. Installing vinyl siding will require disturbing the asbestos by nailing into it. 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. Covering old asbestos shingles with new siding may seem like an option too but it s not easy to do safely. This is an admirable goal but there are potential complications.

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. The use of asbestos cement roof shingles was growing at a steady rate in the united states. 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. Testing your siding for asbestos.

The siding was made by combining cement with asbestos which is a naturally occurring mineral that is fibrous in nature and fireproof. If you don t know the age of the shingles inspect them for wear. As the experts at asbestos siding note it is sometimes difficult to spot because it was often manufactured to resemble different types of siding in a variety of colors and textures. Asbestos cement is a mixture of portland cement reinforced with asbestos fibers.

Older style cement siding shingles were traditionally made by mixing asbestos into the cement in order to fireproof and strengthen siding. Determine when the shingles were installed on your roof. Let the siding dry then prime and paint with the best exterior latex you can find. Difference between latex paint and encapsulants.

If your siding fits either of these descriptions you should consider having it tested. Both the epa and the vinyl siding institute recommend not disturbing asbestos if at all possible. A brief history of asbestos cement siding. Asbestos shingles are relatively strong but.

Because fiber cement siding manufactured in north america after around 1978 was made without using asbestos in those later products and because those non asbestos fiber cement shingles included products that by eye were an exact visual match for their older asbestos containing brothers and sisters already installed a building built. If they look old they might have asbestos fibers in them. Right way to apply paint to asbestos shingles and siding. Everyone is trying to save money today by doing things themselves.

The portland cement binds asbestos fibers into a hard mass. The siding may also contain asbestos if it is old with a wood grain texture to resemble cedar. Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos.