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>

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Q: Does knob and tube wiring have asbestos?

• <div><p>Knob and tube wiring is an older type of electrical wiring that's no longer used and <a href="https://www.angi.com/articles/knob-and-tube-electrical-wiring-safe.htm">generally not considered safe</a>. 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.</p></div>

Q: How long does testing take?

• <div><p>Sampling typically takes 1-3 hours, and depending on the provider, lab results are available within 2-7 days.</p></div>

Q: What does water do to asbestos?

• <div><p>Asbestos-containing materials are not easily affected by water and do not disintegrate or dissolve when exposed to it. However, porous materials can deteriorate due to water exposure, leading to the release of asbestos fibers into the air. The settling of asbestos fibers can also occur as water makes them heavy, which reduces the risk of airborne exposure, though future disturbance of the materials could cause risk. Wetting asbestos-containing materials does not constitute safe removal, and the proper handling and disposal of asbestos materials should be left to professionals.</p></div>

Q: Does vermiculite insulation contain asbestos?

• <div><p>Vermiculite insulation that comes from a particular mine before 1990 is likely to contain asbestos. This is particularly true in the U.S. However, not all types of vermiculite insulation contain asbestos. Since you can't detect the presence of asbestos without special equipment, it's best to assume that the insulation contains the dangerous mineral and to either leave it alone or hire a professional to handle it.</p></div>

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Verified Reviews for Percolation Testing pros in Lincoln, MT

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

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

Last update on November 22, 2025

Reviewed in November 2025
Dylan did 2 roofing jobs for me. The first he did an excellent job. I hired him for a second job to replace roofs on 5 homestead cabins. He pulled off the old roofs, put down new underlayment and never came back I paid him 2 installments as per our contract but not the last third which was...
Lolo Peak Roofing LLC
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Reviewed in March 2023
Western Montana Roofing is the kind of company I'd have work on my house any day. The main reasons are, trustful, honest, and hardworking. They got to my house to do a job and they got it done quick. Not only that, but this company will work on some pretty cold days. Im giving this company 5...
Western Montana Roofing
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Reviewed in February 2021
I had my normal crew of cleaners bail on me the day I had a family coming a 3 night stay. I had a couple leave the day of the next family coming in. A switchback as they call it so to try and find a new cleaner in a 5 hour period and to get the job(2 1/2 hour minimum with 2 people) done was...
Stacy West
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Reviewed in October 2020
Project: Repair, replace and clean interior stack on wood burning stove. So, so happy with the work that was done. Felt comfortable enough speaking with Mark over the phone to give him access to my cabin while I wasn't there. Left the work area cleaner than he found it. Cost of the job was far...
Orca Fireplace, LLC
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Reviewed in April 2020
Had reception problems for years. They came, put a new antenna up and checked the wiring, scanned the channels on the TV's. Great job.
On Site Satellite, Inc.
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Reviewed in September 2019
Honest and very reliable. We will hire again and recommend to everyone! Al is a very kind man who knows his skills well and it shows. I recommend to anyone looking for a very good electrician.
Armko Electric, Inc.
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Reviewed in August 2018
Knowledgeable neat and clean job highly recommend
Robert Glen King
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Reviewed in September 2015
HORRID and TERRIBLE service and a complete lack of professionalism. DON'T hire these people. Not only will they not return your call for an estimate but if and when they do show up at the job, they will do nothing but complain. Complain about materials, the pitch of the roof, everything is a...
Electric City Roofing
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Reviewed in June 2013
They got me in right away, as I was really in a bind and with a dead battery (already jumped 2V by AAA). Very professional, fresh scones and coffee in waiting room and washed the car!
Hillside Auto Repair
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Percolation Tests questions, answered by experts

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.

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.

Sampling typically takes 1-3 hours, and depending on the provider, lab results are available within 2-7 days.

Asbestos-containing materials are not easily affected by water and do not disintegrate or dissolve when exposed to it. However, porous materials can deteriorate due to water exposure, leading to the release of asbestos fibers into the air. The settling of asbestos fibers can also occur as water makes them heavy, which reduces the risk of airborne exposure, though future disturbance of the materials could cause risk. Wetting asbestos-containing materials does not constitute safe removal, and the proper handling and disposal of asbestos materials should be left to professionals.

Vermiculite insulation that comes from a particular mine before 1990 is likely to contain asbestos. This is particularly true in the U.S. However, not all types of vermiculite insulation contain asbestos. Since you can't detect the presence of asbestos without special equipment, it's best to assume that the insulation contains the dangerous mineral and to either leave it alone or hire a professional to handle it.

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