Asbestos Testing Before a Remodel, From First Question to Lab Report

Do You Need to Test at All

Asbestos was used in many building products for decades, so older homes can have it in places like insulation, floor tile, ceiling texture, siding, roofing and pipe wrap. You cannot tell by looking. Only a lab test can say.

The EPA says that if a material is in good shape and you will not disturb it, you do not need to test it. Leave it alone. The risk comes when fibers get into the air, which happens when materials are cut, sanded, scraped, broken or badly damaged.

So the question is simple. Are you about to disturb it. If you plan a remodel, a water damage repair that means tearing out material, or a demolition, then yes, test first.

Step One, List What You Will Touch

Write down which rooms and which materials your project will affect. Think flooring, ceilings, walls, plaster, ductwork, pipe wrap, roofing and siding. Tell your contractor and ask whether they require testing before they start. Many do, and some will refuse to start without results.

Check your age range. Our guide on asbestos in older homes lists common hiding places and what years to worry about. A newer home is less likely to have asbestos, but a remodel in an old house with newer finishes may still reveal old layers under them.

Step Two, Hire an Accredited Inspector

The EPA says a trained and accredited professional should take the samples. Sampling done wrong can release fibers and be worse than leaving the material alone. That is why taking your own samples is not recommended.

Ask for the inspector's accreditation and look it up with your state. Requirements vary by state. Ask what they will sample, how many samples, how they will seal the spot afterward, and what the price includes. Ask which lab they use and whether the lab is accredited for asbestos analysis.

Ask whether the inspector also sells removal. An inspector with no stake in the removal job has less reason to find more asbestos than there is.

Step Three, the Lab Report

The lab reports whether asbestos was found in each sample, what type, and about how much. A result is usually given by sample, so one material can be negative and another positive. Read the sample list against your list of materials so you know what each result covers.

A negative result tells you about that sample only. If a material changes from room to room, such as different layers of flooring, ask whether each layer was sampled. Ask the inspector to explain anything you do not understand, and keep the report. You will want it for your contractor, a future buyer, and possibly your insurer.

Step Four, Decide What to Do

If the results are negative, your contractor can proceed with normal care. If any material tests positive, you have choices. You can change the plan so the material is not disturbed, have it sealed or enclosed by a professional, or have it removed by a trained and accredited abatement contractor. Our guide on asbestos removal cost covers what that usually runs.

The EPA says repair or removal by an accredited professional is needed if material is more than slightly damaged or if your changes might disturb it. Rules for notices, permits, disposal and who may do the work differ by state and city. Call your state environmental or health agency, and your local air district or building department, before work begins.

The federal asbestos NESHAP rules on inspection before demolition or renovation exclude residential buildings with four or fewer units, so a single family home is handled under state and local rules instead. That does not make the risk go away. Do not assume you are exempt, and ask your local agency.

If You Already Disturbed It

If you broke or sanded something and now worry it had asbestos, stop work. Keep other people and pets out of the area. Do not sweep or use a regular vacuum, which can spread fibers. Close the door, turn off fans or HVAC that could move air, and call an accredited professional for advice.

Do not panic. One short exposure is not the same as years of exposure, but it is a good reason to get proper help and to avoid more disturbance.

When to Call a Pro and Your Insurer

Call a pro for any sampling, any removal and any cleanup after material was disturbed. Do not scrape popcorn ceilings, cut old flooring or break plaster in an older home before you know what is in them. If a textured ceiling is on your list, start with our guide on popcorn ceiling testing.

Ask your insurer whether asbestos testing or removal is covered. Policies often cover it only when the asbestos was disturbed by a covered event like a fire or burst pipe, and often exclude it for planned remodeling. Ask before you hire, and keep every report and invoice.