People typically panic when they hear their home may contain asbestos containing materials. However, generally, there is no need to panic. Asbestos, when undisturbed, is not generally considered harmful. Only when it becomes airborne can it be harmful to the lungs.
Asbestos is a naturally occurring mineral that is fibrous and has good heat resisting qualities. In construction it was common until the late 1970s to use asbestos materials in roofing shingles, exterior wallboard, acoustic spray (popcorn ceilings), insulation, flues, duct tapes, and more. Here are some examples found by Tanque Verde Home Inspections: