Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Greencastle, PA

Q: Is radon a serious problem?

• <div><p>Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).</p></div>

Q: What is the biggest source of radon?

• <div><p>The soil beneath your house is most likely what&rsquo;s causing an increased level of radon. This is because soil holds radioactivity for a long time and it&rsquo;s also what most buildings are built on. Another common source of radon is water from a source that hasn&rsquo;t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.</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: How does radon enter my home?

• <div><p>Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.</p></div>

Q: What if radon is still high after mitigation?

• <div><p>You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.</p></div>

Enter your zip and get matched with up to 5 pros

Need a pro for your radon detection and reduction project in Greencastle, PA?

Select your specific project to find the pro for you.

Verified Reviews for Radon Detection And Reduction pros in Greencastle, PA

*The Angi rating for Radon Detection And Reduction companies in Greencastle, PA 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 Greencastle, PA 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 June 14, 2024

Reviewed in June 2024
Joe did an excellent job removing two large maples and trimming limbs on others. He also pointed out potential problems on other trees and those that did not need attention. All work was done neatly and sooner than expected. Very professional, organized, and responsive.
Falling Branch Tree Services LLC
Request a quote
Reviewed in May 2024
Professional, courteous, competitive pricing, and very responsive. The company did an excellent job installing an asbestos mitigation system in our basement. The were polite, kept the work area clean, and even more importantly, completed the task quickly and professionally. The best part is...
BASS Air Quality Systems
Request a quote
Reviewed in February 2024
They did an excellent job. They fixed the nail pops and some cracks in the ceiling. My ceilings look great and I am planning on using them again for more interior painting. They were neat and clean and covered everything. No paint drops anywhere.
Hammond's Painting
Request a quote
Reviewed in November 2023
NextDay Inspect was professional and thorough. The documentation in the report was detailed and easy to understand. I especially appreciate the images the inspector took throughout the inspection and attached to the report. The radon inspection was helpful and detailed as well.
NextDay Inspect
Request a quote
Reviewed in October 2021
Michael is passionate about Radon Mitigation. He was very responsive in terms of confirming and maintaining his commitment to complete the required tasks. Inasmuch as Radon mitigation is not a new industry, I think it would help homeowners to explain the process from start to finish just to...
A Breath Of Fresh Air
Request a quote
Reviewed in August 2021
Highly recommend Zeiset Tree Service. Joe and Lindon did an amazing job trimming our tree and hedge. They were friendly, professional and on time.
Zeiset Painting Contractors
Request a quote
Reviewed in May 2021
We had the front of our house landscaped. Aaron and his workers removed, the old shrubs and stumps, and planted the shrubs we had selected, mulched the entire area. They took all of the debris away and left a clean area. The results were amazing. Aaron is easy to work with, respectful and...
Aaron's Landscaping
Request a quote
Reviewed in February 2021
Regg was awesome!! He was very thorough, had all the right tools to make his job efficient and giving us the information needed for our peace of mind as a new homeowners beyond what was needed. For a 1450 square-foot near me flipped remodeled home, we were there for about 2 1/2 hours and just...
Regg Gosserts Home Inspection
Request a quote
Reviewed in October 2020
Had a home inspection for a HUD foreclosure we just bought. He was very responsive and informative prior to the inspection helped to refer me to a person for a radon inspection as well as to the electrical inspector we needed as well. Provided info that even my electric company did not which...
LifeHouse Home Inspections
Request a quote
Reviewed in September 2020
Jerry Smith was extremely knowledgable, professional, and excellent at teaching. I will certainly use him for any future home inspections. He is not only kind, but took extra care to make sure my wife and I understood everything about our home, and how to maintain it well. He was clear and...
Absolute Home Inspections LLC
Request a quote

Find Radon detection and reduction specialists in Greencastle

C&S Home Inspections

4.8(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Greencastle, PA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: Quick response

"Radon was over 6, now it's under 1. Job was done quickly."

Response time2 days

Response rate96%

2 neighbors recently requested a quote

Serving Greencastle, PA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Very Professional friendly answered all our questions. Would highly recommend him. Thank you Dave and Patte Hays"

9 neighbors recently requested a quote

Request Quote

Radon Protection Services of Gettysburg

4.6(

)

Radon Gas - Abatement

Serving Greencastle, PA and surrounding areas

In business since 1988

Free estimates

Small jobs welcome

"In and out in one day. Radon levels are where they need to be. Work looks great. Very professional job."

Response time11 hrs

Recommended by100%of homeowners

Request Quote

MCJ Home Inspection, LLC

4.9(

)

Radon Gas - Testing

Serving Greencastle, PA and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"Our inspector was Alan and he was, in a word, excellent. He truly went above and beyond. We highly recommend MCJ in general and Alan in particular."

Response time5 hrs

Response rate100%

Recommended by89%of homeowners

Radon Gas - AbatementRadon Gas - Testing

Serving Greencastle, PA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"I had a pipe burst in the basement of our rental property, Flood Crew was referred by our realtor. They arrived quickly after the pipe was fixed by our plumber, demoed, and dried out the areas, even handled packing out our furniture and placing carefully in a pod storage while the work was being done. They did mold testing and made sure everything was safe, the best part was that they dealt with the insurance and we didn’t have to do anything."

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

+57

Recommended by88%of homeowners

Request Quote

Radon Detection and Reduction questions, answered by experts

Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

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.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

The Greencastle, PA 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

Mitchell Grant
•
Mar 18, 2026Mar 18, 2026
How Much Does a Radon Mitigation System Cost? [2026 Data]
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Alison Kasch
•
Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
Angi
•
Mar 18, 2026Mar 18, 2026
How Much Does Radon Testing Cost? [2026 Data]
Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.
Amy Freeman
•
Jul 9, 2026Jul 9, 2026
Who Installs Radon Mitigation Systems?
Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 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.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 2026
What Is Radon Testing?
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.