Is asbestos commonly found in older homes?

• <div><p>Asbestos is commonly found in certain older homes, depending on the time period in which they were built. Asbestos use in home construction began in the 1920s and peaked after World War II before being limited by legislation in the ’70s, so a house constructed in 1880 is unlikely to contain asbestos, while one built in 1950 is much more likely to. Research a home’s history to determine the time period when it was built and any renovations made since. </p></div>

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>

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*The Angi rating for Percolation Testing companies in Sun Valley, 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 September 03, 2025

Reviewed in September 2025
I had a great experience with John Mold Test Providers. They were very nice, professional, and easy to work with from start to finish. They explained everything clearly, answered all my questions, and made the whole process stress-free. I really appreciated their professionalism and how...
John Mold Testing, Inc.
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Reviewed in May 2021
I hired Geoffrey to test if there was asbestos in my home. He was quick, professional, and very fairly priced. I got my results earlier than expected and would recommend him to anyone.
Mereson Environmental Services
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Reviewed in May 2020
We are an environmental testing company and have referred and tested behind Mold Solutionz. They pass our clearances and do good quality work. I recommend them.
Mold Solutionz 24/7
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Reviewed in February 2018
I hired First Source Restoration for a mold test. They were fast, gave great discounts and were very helpful answering all questions patiently.
First Source Restoration, Inc.
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Reviewed in October 2016
It went well, Anthony and his son Richard arrived on time and were able to successfully inspect my home and determined where the mold was coming from. They also took both air samples and a swab test to send to a lab to have it analyzed. Once the results came in they were able to submit a report...
California Certified
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Reviewed in November 2015
I used this company because of the price was competitive, and E.Z suggested a mold test before he even started the whole process just to make sure I need it. He came over for an estimate, a day after i received the estimate and 3 days after they started the restoration process which took few...
Green Planet Mold & Restoration
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Reviewed in July 2015
He ran test before he started the job and gave you an estimate first very anust and fast and very clean just a little on the high side but so far all good
Antex Electric, Inc.
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Reviewed in October 2014
From the get go to the end, Repipe 1 provided me with excellent customer services by their very professional and attentive staff. I had a pipe burst in the bathroom in the middle of the night and within minutes my bathroom was literally flooded with water, I called Repipe 1 and surprisingly a...
Repipe 1
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Reviewed in August 2014
Yes, Mark, The Mold Guy did literally SAVE MY LIFE!!! While performing a mold inspection and the testing service I'd requested on my tiny budget, he discovered that the true cause of the “sick building syndrome” in my apartment causing my hospitalization and failing health was not mold!!! It...
The Mold Guy Inc
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Reviewed in June 2013
We recently purchased an older home and were concerned that the flooring may contain asbestos. As we want to replace the floors in the kitchen, we thought it would be a wise ideas to have the current and older flooring (contained underneath a newer plywood subfloor) tested before we started the...
PropertyHealth, Inc.
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Percolation Tests questions, answered by experts

Asbestos is commonly found in certain older homes, depending on the time period in which they were built. Asbestos use in home construction began in the 1920s and peaked after World War II before being limited by legislation in the ’70s, so a house constructed in 1880 is unlikely to contain asbestos, while one built in 1950 is much more likely to. Research a home’s history to determine the time period when it was built and any renovations made since.

Costs depend on property size, test types, and additional services like mold sampling.

Federal law doesn’t require homeowners to disclose the presence of asbestos in their home, but some states and local municipalities may require it. That is why it’s important to test an older home for asbestos and other health hazards before moving forward with a sale.

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.

Knob and tube wiring is an older type of electrical wiring that's no longer used and generally not considered safe. However, some homes still have it, or may have a knob and tube wiring system that was incorrectly modified or rigged to work with a modern electrical system. Knob and tube wiring may contain asbestos insulation, but the only way to know is to have the material professionally tested.

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