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Q: What would cause radon in a house?

• <div><p>The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.</p></div>

Q: What level of radon is considered safe or dangerous?

• <div><p>No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.</p></div>

Q: How is radon gas abatement professionally handled?

• <div><p>Abatement includes sealing entry points and venting with systems that reduce radon levels below recommended EPA limits. It is handled by certified professionals.</p></div>

Q: How long can you go without a radon fan?

• <div><p>Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.</p></div>

Q: Is a radon mitigation system expensive to run?

• <div><p>The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Madison, VA

*The Angi rating for Radon Detection And Reduction companies in Madison, VA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

*The HomeAdvisor rating for Radon Detection And Reduction companies in Madison, VA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

Last update on January 12, 2026

Reviewed in January 2026
I had two known dead trees that had to be removed for safety. Julio came out evaluated the trees and my overall proeprty. He found other dead trees, problem trees (large hollows and signs of other issues). He quoted a very reassonable price and was able to start rightaway. the trees were all...
E.T. General Contractor, Inc.
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Reviewed in September 2025
The personal and professional pride and attention to detail BWSS takes is reflected in the excellent quality of the work and is performed at reasonable prices. BWSS has repaired the roof and gutters, replaced the deck, and installed hardwood floors. The exterior of our natural cedar shingled...
BWSS LLC
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Reviewed in July 2025
It was a Sunday afternoon when my son's family were down stairs and noticed a bees nest on the basement door. I went to look and it wasn't anything that I could take care of, it was a huge yellow jacket nest at my basement door. I turned to Angi and Freedom Pest Control contacted me right away....
Freedom Pest Control LLC
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Reviewed in July 2025
This job was huge,and in very hot weather the work done was.miraculous! There was much more than tree trimming needing to be done,and this group is patient, professional,and genuinely caring about making positive differences. I highly recommend this business,and continue to be grateful to be...
FLORES CONSTRUCTION TREE SERVICE LLC
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Reviewed in February 2025
Great Service! Removal was done very professionally and quickly. Victor was great at discussing the work that needed to be done and made good recommendations on other work needed. The pricing was very reasonable for the type and amount of work done. Victor was really good at communications and...
Kings Tree And Outdoor Services
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Reviewed in October 2023
Ray is very friendly and personable. He understood what needed to be done and found ways to complete the jobs. I will use Ray for any further odd jobs that come up.
Select 1 Remodel
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Reviewed in September 2023
Excellent customer service including good communication, punctual, efficient, and friendly. The crew were professionals and took down the trees with no damage to anything nearby. They cleaned up thoroughly afterward. Anna showed me a fungus problem with my crepe myrtles and will send me...
A&M Tree and Landscape Service, Inc.
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Reviewed in May 2023
We could not be happier with the service and the quality of the work from Valley Roofing. Our home is 5000 Sf and 120' long. It was an old country store for many years and had presented numerous challenges to say the least. Lowell's thorough inspection and assessment of the job allowed him to...
Valley Roofing
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Reviewed in January 2023
Great company they have gone above and beyond when my water line broke came after hours and worked till I had water.Tree removal service was excellent.
Edward Green's Tree Service
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Reviewed in January 2023
Josh evaluated the job, made suggestions, gave me a quote and proceeded to do all the earth moving and readiness for a large steel building. He oversaw all the leveling with transits, backfill and compaction, gravel fill and placement of the pavers. He suggested decorative patterns, color...
GROUND EFFECTS Landscape Construction Inc.
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Find Radon detection and reduction specialists in Madison

TOPS RADON

5.0(

)

Serving Madison, VA and surrounding areas

Approved

In business since 2025

Free estimates

Offers commercial services

"Our radon system had become inoperable. Tops was able to repair the system and getting everything up and running quickly and efficiently. I highly recommend Tops!"

Response time2 days

1 neighbors recently requested a quote

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Bierer's Home Inspection LLC

5.0(

)

Serving Madison, VA and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

"A learning experience. Roof wasn't updated as i was yold"

17 neighbors recently requested a quote

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Clatterbuck Home Inspections, LLC

New to Angi

Serving Madison, VA and surrounding areas

Approved

In business since 2008

Free estimates

Credit card accepted

Home Inspections

Response time10 hrs

Serving Madison, VA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"I am very pleased with the quality work and how quickly my water damage issue resolved. They were extremely professional and knowledgeable and did a great job at keeping me up to date on the progress of the cleanup."

Drying bathroom wood subfloor from kitchen using indirect control heat, controlled by thermostat we set in place

+57

Recommended by88%of homeowners

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All States Air Duct Pro

3.1(

236

)

Serving Madison, VA and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"o.k. Wasn't impressed
"

Recommended by49%of homeowners

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CIAenterprize.com - 3 Photos - Home Inspector - 1080 carefree lane, Boyce, VA 22620

4.5(

)

Serving Madison, VA and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"The company personnel conducted themselves in a very professional manner and provided detail explanations to questions I had. Would definitely use them again for my next project."

Recommended by100%of homeowners

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Radon Detection and Reduction questions, answered by experts

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

Abatement includes sealing entry points and venting with systems that reduce radon levels below recommended EPA limits. It is handled by certified professionals.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.

The Madison, VA homeowners’ guide to radon detection and reduction services

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

See all articles

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Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
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How Much Does a Radon Mitigation System Cost? [2026 Data]
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Apr 5, 2026Apr 5, 2026
5 Questions to Ask About Radon Gas Abatement
Radon is a radioactive gas that can enter a home from the ground. Prepare yourself for mitigation by answering these questions before hiring a pro.
Jacqueline DeMarco
•
May 2, 2026May 2, 2026
What Is Radon and How Does It Get In Your Home?
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
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•
Apr 8, 2026Apr 8, 2026
How Long Does a Radon Mitigation System Last?
How long does a radon mitigation system last? A properly installed and maintained system can last 20 years or more, but various issues can reduce the life span.