Is asbestos siding dangerous?

• <div><p>Asbestos siding can be dangerous, but it doesn't necessarily pose a health risk if it's in good condition and left undisturbed. The danger comes from inhaling asbestos fibers, which can be released if the siding is damaged, deteriorating, crumbling, or disturbed during remodeling or repairs. Exposure to these airborne fibers can cause serious, life-threatening diseases like asbestosis (lung scarring), mesothelioma (an aggressive cancer), and other lung cancers.</p><p>If your asbestos siding is intact, the general recommendation is to leave it alone. However, if it's damaged or you plan to renovate, it's crucial to handle it safely. Due to the significant health risks and the difficulty of containing the fibers, it is not recommended to perform any asbestos work yourself. Instead, you should hire a professional asbestos removal company to inspect, repair, encapsulate, or remove the material. The presence of asbestos can also negatively impact your property's value.</p></div>

Is it safe to cover an asbestos popcorn ceiling?

• <div><p>Some pros may recommend covering a popcorn ceiling that tests positive for asbestos with beadboard ceiling planks or drywall. The <a href="https://www.angi.com/articles/cost-to-install-beadboard-over-popcorn-ceiling.htm">cost to install a beadboard ceiling</a> averages more than $5,000, but you likely will pay more than the average for the installer to deal with the asbestos safely. Installing a beadboard ceiling or new drywall will disturb the asbestos and release some microscopic fibers, so the installer will need to take precautions. </p></div>

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*The Angi rating for Percolation Testing companies in Castaic, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Percolation Testing needs.

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Last update on February 18, 2026

Reviewed in February 2026
I had a smooth and stress-free experience with ProDetect Mold Inspection. Their surface mold testing was thorough and well-documented. Moisture detection helped identify hidden issues early. Air quality testing provided reassurance about my indoor environment. The technician was friendly,...
ProDetect Mold Inspection
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Reviewed in June 2022
sprinkler repair was great. All repaired and tested. There were many broken sprinklers with complicated repair required. Very happy with the repair.
Robert Starks Landscaping
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Reviewed in May 2019
They did a fantastic job in getting the testing done quickly . They were able to accommodate my schedule and I received the report the next day.
PSR Environmental Consulting Services, Inc.
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Reviewed in October 2014
The mold remediation was fine. They came on time, scheduled the enviornmental test and were prompt about fixing the issues that were noted by the env. testing agency. The experience went downhill once I told them that I would not be using their general contractor for the rebuild of the room. He...
SERVICE MASTER
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Reviewed in October 2013
I want my money refunded. I no longer need the test kit, since I had to have the testing and subsequent remediation done in a timely manner due to the possible dangers of mold.I had to use another testing service. I couldn't wait any longer. <br />
Moldlab
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Reviewed in January 2013
<br /> I contacted WEST COAST MOLD DETECTION , for a mold issue in my kitchen, they came perform an inspection . not only in my kitchen but, in other areas, that the inspector suggest, just in case, and they did it for a fare price comparing with other mold companies that I contacted, they came...
West Coast Environmental Testing
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Reviewed in November 2012
We purchased our new home knowing there was a mold problem <br /> beneath the kitchen sink and in the wall under it, which we discovered during <br /> our home inspections. With a credit from the seller against our purchase <br /> price, we went on to receive estimates from three mold...
PuroClean
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Reviewed in October 2012
We had decided that it was time to continue the upgrading of our home, having started with the kitchen a few years earlier. The estimation process conducted by Preferred's representative was complete, well explained and professional. When we had all the other bids in place, Preferred was...
Preferred Home Builders Inc
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Reviewed in October 2011
Perfect!! Tommy arrived on time, diagnosed the problem, then replaced the pressure regulator, and tested it out after to make sure that it was working properly. He came into the house and checked the faucets to make sure the pressure was still adequate. He worked efficiently, and cleaned up...
Michelangelo's Plumbing Inc
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Reviewed in January 2009
Company called to confirm appt, two women arrived on time to clean. They worked non stop for four hours. Both were kind and friendly. At one point a representative from the company came by to check and see if their work was up to standard (the white glove test, I believe they call it). I...
Merry Maids of Pasadena
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Percolation Tests questions, answered by experts

If you hire a dedicated asbestos inspector near you in addition to your local home inspector, it will cost between $200 and $800. If, however, your general home inspector happens to be certified as an asbestos inspector, they can charge you a smaller fee and tack on the cost to the home inspection. In general, home inspectors do not do physical testing, but will provide a visual assessment so you know what you are working with.

Asbestos siding can be dangerous, but it doesn't necessarily pose a health risk if it's in good condition and left undisturbed. The danger comes from inhaling asbestos fibers, which can be released if the siding is damaged, deteriorating, crumbling, or disturbed during remodeling or repairs. Exposure to these airborne fibers can cause serious, life-threatening diseases like asbestosis (lung scarring), mesothelioma (an aggressive cancer), and other lung cancers.

If your asbestos siding is intact, the general recommendation is to leave it alone. However, if it's damaged or you plan to renovate, it's crucial to handle it safely. Due to the significant health risks and the difficulty of containing the fibers, it is not recommended to perform any asbestos work yourself. Instead, you should hire a professional asbestos removal company to inspect, repair, encapsulate, or remove the material. The presence of asbestos can also negatively impact your property's value.

Asbestos itself does not typically leak from a roof. However, if an asbestos-containing roof is damaged or deteriorated, it can release asbestos fibers into the air. This can occur when the roof is disturbed, such as during maintenance or repairs, or due to weathering over time. Exposure to airborne asbestos fibers can be harmful to health, so it is important to address any damaged asbestos roofs promptly and safely.

There are products that still contain asbestos, but they were typically installed decades ago. Common places where you may still find asbestos-containing materials are in siding, wrapped around ductwork, in older appliances (i.e., stove and gravity furnaces), and in floors. Asbestos was primarily used as an insulator, so anywhere in an older home where you lose heat is where you will most likely find asbestos.

Some pros may recommend covering a popcorn ceiling that tests positive for asbestos with beadboard ceiling planks or drywall. The cost to install a beadboard ceiling averages more than $5,000, but you likely will pay more than the average for the installer to deal with the asbestos safely. Installing a beadboard ceiling or new drywall will disturb the asbestos and release some microscopic fibers, so the installer will need to take precautions.

The Castaic, CA homeowners’ guide to percolation testing services

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