Asbestos testing is tested by taking the samples from the area and then they are taken to the laboratory for the presence of asbestos. If tests prove to be positive than the area is properly secured till the time the removal process from the area is not done. It is also a big factor that one should know where he has to look for asbestos. In older homes you have to look for this as well. This is important as in the past it was famous for one thing and used extensively for insulation. Heat ducts in your home should be the place where you have to look for asbestos testing.