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Find Radon gas testers in Greencastle

Avatar for C&S Home Inspections

C&S Home Inspections

4.91(
52
)
•Approved Pro

C&S Home Inspections

4.91(
52
)
•Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
9 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"They did a great job."

Karen C on November 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"They did a great job."

Karen C on November 2025

Avatar for NextDay Inspect

NextDay Inspect

4.94(
316
)
•Approved Pro

NextDay Inspect

4.94(
316
)
•Approved Pro
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
190 local quotes requested

Our goal is to protect our clients' interest by providing a thorough and detailed inspection of the property. Safeguarding our clients' investment is our priority. We provide residential home inspections, commercial building inspections, pre-drywall inspections, radon gas testing, and mold sampling. View the rate for your home inspection and scheduling availability on our website. Home Inspectors at NextDay Inspect® are licensed by the Department of Professional and Occupational Regulation (DPOR) and the Department of Labor, Licensing, and Regulation (DLLR). Upon completing the on-site inspection the inspector will prepare a report, including photographs taken at the property, and arrows with commentary detailing the areas of concern. Specialized tools are used to ensure a thorough inspection of the properties components. Some of these tools are thermometer, moisture & humidity meter, thermal infrared camera, outlet tester. We have an A plus rating with the Better Business Bureau.

"Michael was nothing but professional, friendly, thorough, and easy to talk with!"

Bryant L on December 2025

Our goal is to protect our clients' interest by providing a thorough and detailed inspection of the property. Safeguarding our clients' investment is our priority. We provide residential home inspections, commercial building inspections, pre-drywall inspections, radon gas testing, and mold sampling. View the rate for your home inspection and scheduling availability on our website. Home Inspectors at NextDay Inspect® are licensed by the Department of Professional and Occupational Regulation (DPOR) and the Department of Labor, Licensing, and Regulation (DLLR). Upon completing the on-site inspection the inspector will prepare a report, including photographs taken at the property, and arrows with commentary detailing the areas of concern. Specialized tools are used to ensure a thorough inspection of the properties components. Some of these tools are thermometer, moisture & humidity meter, thermal infrared camera, outlet tester. We have an A plus rating with the Better Business Bureau.

"Michael was nothing but professional, friendly, thorough, and easy to talk with!"

Bryant L on December 2025

P&W Remodeling

3.25(
4
)

P&W Remodeling

3.25(
4
)
Customers say: Terrific value
17 years of experience

Additional email - jspud@live.com.

Additional email - jspud@live.com.

Avatar for Superior Floorcoverings & Kitchens

Superior Floorcoverings & Kitchens

4.98(
42
)

Superior Floorcoverings & Kitchens

4.98(
42
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We offer custom designs for flooring, showers, kitchens in addition to carpet, vinly, hardwood and more. We have nine employees and use our own installers. Estimates are free and we can bring the samples to your home ( 50 mi radius ),or you can visit our showroom. Our showroom features a kitchen area that allows you to see our cabinets and how they are constructed. The showroom also features a custom shower, custom sink, and different flooring ideas throughout.

We offer custom designs for flooring, showers, kitchens in addition to carpet, vinly, hardwood and more. We have nine employees and use our own installers. Estimates are free and we can bring the samples to your home ( 50 mi radius ),or you can visit our showroom. Our showroom features a kitchen area that allows you to see our cabinets and how they are constructed. The showroom also features a custom shower, custom sink, and different flooring ideas throughout.

ServiceMaster Professional Cleaning

1.00(
3
)

ServiceMaster Professional Cleaning

1.00(
3
)
40 years of experience

ServiceMaster Professional Cleaning does water and fire damage mitigation. We work with most insurance companies to mitigate and repair damages caused to homes and businesses by fire or water.

ServiceMaster Professional Cleaning does water and fire damage mitigation. We work with most insurance companies to mitigate and repair damages caused to homes and businesses by fire or water.

Avatar for Moldlab

Moldlab

4.74(
352
)

Moldlab

4.74(
352
)
Customers say: True professional
26 years of experience

Mold identification, mold test kits and testing supplies. If you suspect you have a mold problem give us a call toll free and we can walk you through your testing options.

"The self-test product was as expected. The reports require additional research to interpret and understand, so seemed more targeted at professionals."

Jessica H on February 2018

Mold identification, mold test kits and testing supplies. If you suspect you have a mold problem give us a call toll free and we can walk you through your testing options.

"The self-test product was as expected. The reports require additional research to interpret and understand, so seemed more targeted at professionals."

Jessica H on February 2018

GLADHILL PROPERTY SVC & PEST

4.50(
2
)

GLADHILL PROPERTY SVC & PEST

4.50(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Gladhill Services provides many types of property services in 4 states, PA,MD,WV,VA. Pest Control, Termite Control, Mold Inspections, Mold Remediation, Waterproofing, Air Quality, Humidex Installation,Lawn/Tree & Turf. Our office is 24/7 to provide for any emergency services.

"It went very well they removed the molds very respectful because the day they came to remove the mold my cousin had passed away that day. They were very respectful they came in and did the job and I have no complaint."

Beatrice R on September 2021

Gladhill Services provides many types of property services in 4 states, PA,MD,WV,VA. Pest Control, Termite Control, Mold Inspections, Mold Remediation, Waterproofing, Air Quality, Humidex Installation,Lawn/Tree & Turf. Our office is 24/7 to provide for any emergency services.

"It went very well they removed the molds very respectful because the day they came to remove the mold my cousin had passed away that day. They were very respectful they came in and did the job and I have no complaint."

Beatrice R on September 2021

Avatar for Jardine's Restoration and Painting LLC

Jardine's Restoration and Painting LLC

4.43(
7
)

Jardine's Restoration and Painting LLC

4.43(
7
)
Customers say: Quick response
35 years of experience

Contractor. With our technical know-how, specifications understanding, and the meticulous care and craftsmanship required to preserve and protect the historical structure. Our additional capabilities such as Lead Paint Preparation and excellent safety record will add to the success of your project. Additional area - Duncanon, Mechaniscburg, & Hershey,

Contractor. With our technical know-how, specifications understanding, and the meticulous care and craftsmanship required to preserve and protect the historical structure. Our additional capabilities such as Lead Paint Preparation and excellent safety record will add to the success of your project. Additional area - Duncanon, Mechaniscburg, & Hershey,

Global Plasma Solutions

5.00(
1
)

Global Plasma Solutions

5.00(
1
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.

Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.

Dr. Handyman, Inc.

No reviews yet

Dr. Handyman, Inc.

No reviews yet
28 years of experience

Dr. Handyman is a family own business based in Hagerstown, MD. We pride ourselves on being Dependable, Reputable and Personable. We are staffed and equipped to handle most any project.

Dr. Handyman is a family own business based in Hagerstown, MD. We pride ourselves on being Dependable, Reputable and Personable. We are staffed and equipped to handle most any project.

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FAQs for radon gas testing projects in Greencastle, PA

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Greencastle, PA homeowners’ guide to radon gas testings

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

See all articles