They can last for more than 40 years and if undamaged they pose little risk of exposure.
Asbestos concrete roof tiles.
But other types of roof tiles containing asbestos also exist.
As asbestos cement is considered a relatively low risk asbestos material you do need not a licensed contractor for removing asbestos roof products.
The cost of testing a small sample is reasonable.
Because there are fiber cement roofing products that replaced asbestos fiber cement roofing products that were subsequently made when asbestos use stopped and because those newer roofing products look so much like the older asbestos containing product without a marking stamped into the roofing material that gives an age product number or.
When replacing the tiles with safer options do not do so carelessly.
Asbestos roof tiles were used from the early 1920s all the way in to the late 1980s.
How to identify asbestos roof tiles.
Asbestos cement roof tiles are usually square shaped and their color is a combination of grey and black.
The asbestos content will vary on the manufacturer but the content will typically be 15 or less.
All mastic or bitumen based pressed metal roof tiles should be suspected of containing asbestos.
As a building material asbestos was very widely used between the 1950s and 90s especially as a roofing material due to its fire resistant properties.
If the tile has less than 1 percent asbestos then the results are negative.
Asbestos roofing tiles are predominately comprised of cement.
This is because until the 1980s asbestos was not fully recognised to be hazardous to the health of anyone exposed to its fibres.
This meant that roofs that were made from.
They are a cement based material known for being hard wearing and can last for more than 40 years.
Just to make sure take two or three samples for comparison.
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.
Take the sample to an asbestos testing laboratory.
Older building have a higher probability of containing asbestos building materials.
However it is advisable that you use a competent and experienced contractor who is aware of the guidelines associated with removing asbestos roof tiles and their disposal.
Tiles which contain asbestos include mastic or bitumen based pressed metal roof tiles that were produced prior to the early 1980s.
This type of roofing material can have various colors from different shades of grey to red green and even blue.
