What does asbestos do to humans?

• <div><p>When asbestos fibers become airborne, they enter a person's respiratory system. These fibers scar and damage the lungs and often lead to serious cancers like mesothelioma. Like many dangers in the house, asbestos isn’t easy to see when it could be causing serious damage. The amount of time exposed, combined with the person’s tolerance for asbestos inhalation and the amount inhaled, will all contribute to health problems.</p></div>

Do all popcorn ceilings have asbestos?

• <div><p>No, not all popcorn ceilings have asbestos, but a vast majority do. The Environmental Protection Agency (EPA) banned its use in 1973, although it still may have been used up through the early ‘90s. But, in general, homes built or remodeled before the early ‘80s likely utilized materials with asbestos. That being said, a professional test is the only way to determine for sure.</p></div>

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*The Angi rating for Percolation Testing companies in Richmond, 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 November 19, 2025

Reviewed in November 2025
I was very happy with my experience- I had an inspection done and both Sophia and La Quisha were very thorough in their inspection and talking through potential explanations and options. They put me at ease!
Sophie's Pest Solutions
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Reviewed in July 2020
Oak called 2nd but came next day/ UN-prepared to do either repair or water test (requested on phone) or even replace with ready new ADA toilet that the lying receptionist booker said they have “some in stock and if not he will show a catalog of choices”. Guy came punctually with Nzo tools or...
Oak Plumbing Inc
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Reviewed in June 2017
The test was simple and I was impressed with how quickly I received the results. Would recommend.
Tap Score, Powered by SimpleWater
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Reviewed in May 2017
Done in one day, at a reasonable cost. A test of efficiency is performed afterward by a separate company, and the tester said they did a quality job. We are very, very happy with the result.
Moore Mechanical Heating & Air Conditioning
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Reviewed in May 2017
I went on to Angie's List looking for mold remediation. I found this company and they came out and tested for mold. I worked with JC, she used some machines and tested the spore levels for mold. It was very high because there was no ventilation in the bathroom. She recommended some mold...
Certified-Environmental
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Reviewed in October 2016
Smoothly. It was several hours of work by Randy, and the result is a fully functioning fireplace. We are delighted with the result and very appreciative of Kidd Fireplace's action to find and implement a definitive and successful solution. As well, the new fireplace passes the cat test. No more...
Kidd Fireplace & Spa
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Reviewed in September 2016
Testing was complete and results within a few days.
A1 Certified Environmental
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Reviewed in June 2014
They were thorough and professional. Unfortunately, they were not able to take infared photos of the house as they often do to show the range in temperatures but had another way to complete the testing. I have hired them to do the suggested upgrades and will write a review on that portion of the...
Advanced Home Energy
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Reviewed in February 2013
My 1945 toilet was "running"; when I opened the tank, I discovered that the water valve was continuously spraying a small mist. I know homeowners can repair this relatively minor problem, but I am elderly and my husband had been working a 9 day shift. I decided to call a plumber to save him...
The Lunt Marymor Company
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Reviewed in October 2008
The process was mostly smooth, however, there were a few odd miscommunication along the way. The estimator insisted on providing sample paints for us to test. When I asked for some sample paint, the owner of the company complained about the cost, stating each sample would cost him $15! I went to...
CertaPro Painters of Berkeley
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Percolation Tests questions, answered by experts

When asbestos fibers become airborne, they enter a person's respiratory system. These fibers scar and damage the lungs and often lead to serious cancers like mesothelioma. Like many dangers in the house, asbestos isn’t easy to see when it could be causing serious damage. The amount of time exposed, combined with the person’s tolerance for asbestos inhalation and the amount inhaled, will all contribute to health problems.

Professional asbestos testers or environmental consultants are the best people to call to test for asbestos. An asbestos testing company specializes in collecting and analyzing samples and will be the most qualified to do the job for you. An environmental consultant may not specialize in handling asbestos, but should still have the knowledge and know-how to safely collect a sample and send it off for analysis.

No, not all popcorn ceilings have asbestos, but a vast majority do. The Environmental Protection Agency (EPA) banned its use in 1973, although it still may have been used up through the early ‘90s. But, in general, homes built or remodeled before the early ‘80s likely utilized materials with asbestos. That being said, a professional test is the only way to determine for sure.

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.

Many homeowners may never have to test their homes for asbestos. Asbestos particles are only dangerous if they become airborne. If you plan to do construction or notice damage to piping, siding, or drywall, you should hire a specialist to test for asbestos.

If you plan to remodel your home or have any concerns, you should have your home tested for asbestos just to be safe.

The Richmond, CA homeowners’ guide to percolation testing services

From average costs to expert advice, get all the answers you need to get your job done.

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