New answers tagged asbestos
As long as the asbestos material is contained between your subfloors you are fine. It doesn't matter if it crumples up being sandwiched in there. You may have to take extra precautions taking it out in this case but it isn't a concern in current state.
Often, people talk about “old-fashioned horse-hair plaster,” but the binding agent in old plaster walls was more commonly cattle hair. -searshomes.org I am reasonably sure it's not asbestos.
Top 50 recent answers are included