The only way to know for sure whether your roof contains asbestos is to have a sample tested by professionals in a certified laboratory.
How long do asbestos roofs last.
Regular flat shingle tiles standard lap are shown below as are common diamond shaped tiles and side.
Hi the first floor of my house has large portion of it covered by asbestos cement it has been so for a few decades now.
Determine when the shingles were installed on your roof.
Manufacturers used to make shingles that would last 40 years but those shingles were made using asbestos which is not used any longer.
If you don t know the age of the shingles inspect them for wear.
Cement asbestos roof shingles typically have a much shorter life than the siding panels.
If they look old they might have asbestos fibers in them.
It is not unreasonable to expect 100 years from a properly maintained asbestos roof.
The roof was in excellent condition for long but over the past few months there were a few incidents of tree branches falling on the roof during heavy winds causing small portions of the roof on the edges to break off.
The thicker ones are about a quarter of an inch and i ve seen them last 70 to 85 years.
Accordingly if the material contains less than 1.
The use of asbestos cement roof shingles was growing at a steady rate in the united states.
Contemporary roofing product manufacturers make reinforced fiber cement roofing shingles and other roofing products which look like perform similarly to and need to be installed similarly to the original corrugated asbestos cement sheet roofing but these new products are free of asbestos.
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.
There is more information about asbestos roofs in the slate roof bible.
The thinner shingles about an eighth of an inch thick typically last about 50 to 60 years.
Neither question has an easy answer because both depend on a number of variables.
As long as the condition of the roof sheets is good then there is little risk of asbestos contamination.
Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos.
The asbestos content in a typical asbestos cement roof is between 2 and 8 and this is encapsulated within the cement matrix.
Most of the times asbestos roofing materials are not dangerous if not damaged and left undisturbed.
How long do asbestos roofs last.
Let s break it down.
7 signs you need a new roof asphalt shingles last 15 to 30 years.
This is one of the most common questions we get asked by clients as well as how much does it cost to replace a roof.
