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I've seen some old horsehair plaster and the fibers were brown and arranged in long straight clumps. Your pictures show white fibers that are more randomly arranged. I'd get it tested before disturbing any more of it.


JWH is correct: simple visual inspection will be inconclusive. But to point up that you are right to be concerned, here's Wikipedia: The use of asbestos became increasingly widespread toward the end of the 19th century, when its diverse applications included fire-retardant coatings, concrete, bricks, pipes and fireplace cement, heat-, fire-, and acid-...


You cannot identify asbestos-containing material by looking at it. If in doubt have it tested!


Before you cast this incident off too quickly, consider 1) level of asbestos in your sample, 2) type of asbestos, 3) amount of exposure (now and in the future), AND possible contamination elsewhere in your house, Your test results came back with 20% crystalline. That is extremely high. The DOE recommends anything over 6% be removed or contained. So, while ...


What manassehkatz says. Because of the tragedy of lifelong workers getting mesothelioma, and the government's ability to catch these companies with some assets, a number of mesothelioma trust funds were set up. Unfortunately cashing in requires a bit of legal legwork, so that gives a role for lawyers. But the success rate is much higher than a lawsuit, so ...


TL;DR Don't worry, be happy. In my non-professional, non-government opinion, you are overreacting. The risk with asbestos (as with smoking, radon and many similar things) is repeated exposure. That doesn't mean a single exposure has no effect, but the big problem is with repeated exposure. Something like, tearing up a floor each day, 200 x a year for 20 ...

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