How do you identify asbestos tiles?

• <div><p>If you can locate building records, you may be able simply to see what type of tiles (or bonding agent) was used. Any flooring made between 1950 and 1989 more than likely contains asbestos. <a href="https://www.angi.com/articles/how-to-tell-if-you-have-asbestos-floor-tile.htm">Asbestos tiles</a> can also be slightly thicker than other tiles and often measure 9” x 9”, 12” x 12”, and 18” x 18. Black mastic was a commonly used adhesive that contains asbestos.</p></div>

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*The Angi rating for Percolation Testing companies in Onalaska, WI 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 August 21, 2026

Reviewed in August 2026
Had inspection for mold cause of symptoms I was experiencing. Very thorough and checked everything. Found some issues in sunroom from water damage but nothing else. Prompt response and great to work with.
MD Mold
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Reviewed in July 2026
They were super polite anwsered right away to my request and got in the very next day, i went for a deep clean and im very happy with the results. they even tackled my pile of dishes for me that had been plaguing my sink!!!! i will 100% be going back to them again when i need a clean
Enchanted Cleaning
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Reviewed in October 2024
I was pleased with the results. The owner and team worked very hard, were respectful, and kept me informed throughout the process. I would not hesitate to use them again.
Coulee Construction and Concrete LLC
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Reviewed in June 2022
The work was excellant. It was completed within very little time and at no inconvenience to me. The contractor was polite, easy to work with, and asked questions to clarify exactly what I wanted. The repair looks great and I am very happy with the results. As an added note, the area was kept...
Hendrickson Remodeling, LLC
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Reviewed in December 2021
I am so happy with how our master bathroom remodel turned out! River Valley Remodelers were so easy to work with and were very professional. They made the whole process painless and did a beautiful job at a reasonable price. I am looking forward to hiring them again to install a new patio door...
River Valley Floor Shield
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Reviewed in November 2020
River Valley Radon did an excellent job on installing our mitigation system. They had assessed the space in advance to ensure the best placement. They also put a test box in the basement after to ensure the levels went down. I’d highly recommend them if you have a radon issue.
River Valley Radon
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Reviewed in July 2020
We have relied on both inspections and radon tests from Advanced Home Inspections for both of our home purchases. Their inspections and reports are very detailed and easy to understand. Both James and Matt have assisted us in the past and have been so helpful! Most recently, Matt walked us...
Advanced Home Inspections LLC
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Reviewed in April 2013
Our furnace was making a clicking sound. The website has an email problem submission window that we made our inquiry at. We received within minutes, a response that said that we would be hearing in the morning when the service could be performed. They called before 9 am. which was what was...
Bagniefski Heating & Air Conditioning
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Reviewed in November 2012
Bob arrived as scheduled, and completed the work on time and within estimate. He called me the day before to ensure the time and day was still okay with my schedule. The work area was cleaner than when he started, and we both tested the new toilet and sink together. I could not have been more...
Advanced Plumbing Systems
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Reviewed in August 2012
I was hesitant about converting to NG, but when one replaces a water heater, it's decision time. I worked with Brent to get an estimate and decided to move ahead. He made all the arrangements with Excel Energy and handled all the installation and conversions. He removed the old water heater...
A/C Doc's West Salem Appliance
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Percolation Tests questions, answered by experts

DIY kits are available, but professional testing ensures accurate results and compliance with regulations.

If you can locate building records, you may be able simply to see what type of tiles (or bonding agent) was used. Any flooring made between 1950 and 1989 more than likely contains asbestos. Asbestos tiles can also be slightly thicker than other tiles and often measure 9” x 9”, 12” x 12”, and 18” x 18. Black mastic was a commonly used adhesive that contains asbestos.

Older textures may contain asbestos, requiring careful handling and professional inspection before work begins to ensure safety compliance.

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.

If you suspect exposure to asbestos, prioritize seeking medical advice by informing your healthcare provider about the potential exposure with clear details about the circumstances that led to the exposure. Regular health check-ups and screenings if you work in high-risk industries or live in a home with asbestos are essential for early detection of any asbestos-related conditions. You should also consider consulting occupational health experts or legal professionals for guidance on potential next steps and preventive measures.

The Onalaska, WI 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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