How do I know if I have asbestos in my home (in floor tile, ceiling tile, shingles, siding, etc.)?

The only way to be sure whether a material contains asbestos is to have it tested by a qualified laboratory. EPA only recommends testing suspect materials if they are damaged (fraying, crumbling) or if you are planning a renovation that would disturb the suspect material. Samples should be taken by a properly trained and accredited asbestos professional (inspector).