If they look old they might have asbestos fibers in them.
Difference between asbestos siding and shingles.
The portland cement binds asbestos fibers into a hard mass.
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.
If your siding fits either of these descriptions you should consider having it tested.
Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos.
The siding may also contain asbestos if it is old with a wood grain texture to resemble cedar.
This is an admirable goal but there are potential complications.
Installing vinyl siding will require disturbing the asbestos by nailing into it.
Determine when the shingles were installed on your roof.
Asbestos cement was first developed in 1905 by the johns manville company who became one of the premier manufacturers of cement asbestos materials.
Unless asbestos siding is disturbed it doesn t pose a significant health hazard and does not need to be removed.
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.
Older style cement siding shingles were traditionally made by mixing asbestos into the cement in order to fireproof and strengthen siding.
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.
If you don t know the age of the shingles inspect them for wear.
The siding was made by combining cement with asbestos which is a naturally occurring mineral that is fibrous in nature and fireproof.
Covering old asbestos shingles with new siding may seem like an option too but it s not easy to do safely.
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.
Asbestos cement is a mixture of portland cement reinforced with asbestos fibers.
Both the epa and the vinyl siding institute recommend not disturbing asbestos if at all possible.
Right way to apply paint to asbestos shingles and siding.
Testing your siding for asbestos.
A brief history of asbestos cement siding.
Let the siding dry then prime and paint with the best exterior latex you can find.
Everyone is trying to save money today by doing things themselves.
Asbestos shingles are relatively strong but.
Difference between latex paint and encapsulants.
