Asbestos-containing materials (ACMs) were popular until people realized that they cause deadly lung diseases. Due to their negative effects on human health, these materials were completely banned in 2003. You can’t tell the presence of ACMs by just looking at them. But you can look for some signs. Signs that your house or working space may have contained ACMs include pipes that have gray or white remnants and old flooring tiles in a 9-inch by the 9-inch pattern. If you already found these signs, then you must immediately contact a professional contractor to perform sampling and testing.