How Long Do Asbestos Roofs Last

If they look old they might have asbestos fibers in them.

How long do asbestos roofs last.

So read on to learn how long different types of shingles are likely to last so you can judge the lifespan of your roof. The only way to know for sure whether your roof contains asbestos is to have a sample tested by professionals in a certified laboratory. 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.

Regular flat shingle tiles standard lap are shown below as are common diamond shaped tiles and side. It is not unreasonable to expect 100 years from a properly maintained asbestos roof. The use of asbestos cement roof shingles was growing at a steady rate in the united states. Manufacturers used to make shingles that would last 40 years but those shingles were made using asbestos which is not used any longer.

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 long as the condition of the roof sheets is good then there is little risk of asbestos contamination. Cement asbestos roof shingles typically have a much shorter life than the siding panels. There are at least three types of asbestos shingles.

Let s break it down. 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. Most of the times asbestos roofing materials are not dangerous if not damaged and left undisturbed. Determine when the shingles were installed on your roof.

The result of the test will lead you to the next step. Asbestos shingles were so common during the 20th century that almost any shingles installed between 1920 and 1986 probably include asbestos. Accordingly if the material contains less than 1. 7 signs you need a new roof asphalt shingles last 15 to 30 years.

There is more information about asbestos roofs in the slate roof bible. 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. Neither question has an easy answer because both depend on a number of variables. If you don t know the age of the shingles inspect them for wear.

How long do asbestos roofs last.