How Long Do Asbestos Roofs Last

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How long do asbestos roofs last.

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 they look old they might have asbestos fibers in them. The thinner shingles about an eighth of an inch thick typically last about 50 to 60 years. As long as the condition of the roof sheets is good then there is little risk of asbestos contamination.

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. Regular flat shingle tiles standard lap are shown below as are common diamond shaped tiles and side. How long do asbestos roofs last. The only way to know for sure whether your roof contains asbestos is to have a sample tested by professionals in a certified laboratory.

7 signs you need a new roof asphalt shingles last 15 to 30 years. There are at least three types of asbestos shingles. Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos. The result of the test will lead you to the next step.

The thicker ones are about a quarter of an inch and i ve seen them last 70 to 85 years. It is not unreasonable to expect 100 years from a properly maintained asbestos roof. If you don t know the age of the shingles inspect them for wear. There is more information about asbestos roofs in the slate roof bible.

So read on to learn how long different types of shingles are likely to last so you can judge the lifespan of your roof. Let s break it down. Determine when the shingles were installed on your roof. Cement asbestos roof shingles typically have a much shorter life than the siding panels.

Manufacturers used to make shingles that would last 40 years but those shingles were made using asbestos which is not used any longer. The use of asbestos cement roof shingles was growing at a steady rate in the united states. 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. The asbestos content in a typical asbestos cement roof is between 2 and 8 and this is encapsulated within the cement matrix.

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.