Homeowners may be surprised to find how many building materials used on houses built before 1975 may contain asbestos. Asbestos is most frequently found wrapped around furnaces/boilers and heating ducts in the basement, but was also used in some types of blown-in insulation, vinyl floor tiles and linoleum, adhesive that glued flooring to concrete, siding shingles, and many other materials.

If you suspect you may have asbestos-containing materials in your home, don’t panic. Yes, prolonged exposure to asbestos fibers can lead to serious lung disease, but in most cases, asbestos in the home is not dangerous. If the material is in good condition, it’s best to leave it alone, since disturbing intact asbestos can create a hazard where there wasn’t one before.

However, it is a good idea to inspect the materials regularly to make sure they haven’t begun to deteriorate. Asbestos that would crumble easily if handled, or that has been sanded, sawed, or scraped can release fibers into the air that can be inhaled into the lungs. Look for tears or damage from water or abrasion; if you find any suspicious areas, you may wish to have them checked by a professional.

Some asbestos-containing materials can be encapsulated with a sealant or covered with a protective wrap. While it is possible for homeowners to do this work themselves, it’s safer to use a professional, since failure to do the job properly can create a hazard for you and your family.

If you are considering a major repair or remodeling project, it’s a good idea to find out if there are any asbestos-containing materials in your home that might be disturbed during the work. Asbestos covering your furnace/boiler or ductwork is usually removed when you replace your heating system. (Make sure the company that does the removal is properly certified and follows procedures that will protect your family.)

For more information on asbestos in the home, check  these articles from the Consumer Project Safety Commission and thisoldhouse.com.