Tiles which contain asbestos include mastic or bitumen based pressed metal roof tiles that were produced prior to the early 1980s.
Asbestos concrete roof tiles.
When replacing the tiles with safer options do not do so carelessly.
If the tile has less than 1 percent asbestos then the results are negative.
Older building have a higher probability of containing asbestos building materials.
Removing asbestos roof tiles.
Asbestos roofing tiles are predominately comprised of cement.
This meant that roofs that were made from.
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.
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.
They are a cement based material known for being hard wearing and can last for more than 40 years.
As asbestos cement is considered a relatively low risk asbestos material you do need not a licensed contractor for removing asbestos roof products.
How to identify asbestos roof tiles.
The asbestos content will vary on the manufacturer but the content will typically be 15 or less.
They can last for more than 40 years and if undamaged they pose little risk of exposure.
The cost of testing a small sample is reasonable.
This is because until the 1980s asbestos was not fully recognised to be hazardous to the health of anyone exposed to its fibres.
Asbestos roof tiles were used from the early 1920s all the way in to the late 1980s.
All mastic or bitumen based pressed metal roof tiles should be suspected of containing asbestos.
The fire resistant properties of these roof tiles weren t the only reason they were so popular as asbestos is incredibly durable and strong.
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.
This type of roofing material can have various colors from different shades of grey to red green and even blue.
The use of asbestos cement roof shingles was growing at a steady rate in the united states.
Take the sample to an asbestos testing laboratory.
