Research the building history. Buildings constructed after the mid 1970s are unlikely to contain asbestos ceiling tiles.
Put on protective gear. Asbestos is a toxic substance that is easily inhaled and should not be allowed to come into contact with the skin. Be sure to cover all exposed areas as much as possible.
Identify ceiling tiles that may contain asbestos. Tiles that were hung during the late 1940s and later that are approximately one square foot and have an off-white, yellowish, or light gray color and have a fairly solid or evenly perforated surface are the most likely to contain asbestos.
Avoid touching, scraping, cutting or otherwise disturbing the suspect tiles. Doing so may release asbestos into the air and put people at risk of exposure.
Turn off any heating or cooling systems that run through the area in question.
Limit access to the area and contact the EPA for a list of certified asbestos inspectors in your area.
Make an appointment for a professional inspector to visit the site and perform the proper tests to determine whether or not the ceiling tiles contain asbestos.