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Find Radon gas testers in Dayton

Avatar for NextDay Inspect
NextDay Inspect
4.9(
344
)

Serving Dayton, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"The structural/electrical/plumbing inspector was fantastic. He spent over 4 hours going through every inch of the home, provided immediate in-person feedback showing significant issues, and followed up <48 hours later (on a holiday weekend) with a 133-page report with pictures, thermal scans, etc. On a lesser note, the radon inspector showed for a few minutes during the structural inspection and set-up measurements in the basement. The report was issued quickly but I found out later that the radon inspector had not taken into consideration the attached (inaccessible) crawlspace that made up 25% of the lower structure. I found out from a radon remediation contractor that the state code required the radon inspector to measure levels on the 1st floor above the crawlspace in cases where the substructure could not be accessed. Overall, the huge amount of time the structural inspector put into the property was worth the A rating. Just watch the radon inspection if you have a strange basement set-up like the house I am purchasing."
Inspections with Matthew
Inspections with Larry
Inspections with Dimitri
Inspections with Rhonda
Cracks in the Foundation- Here we find moderate cracks in the foundation, with evidence that they've been repaired before.

+744

Response time8 hrs
Response rate99%
6 neighbors recently requested a quote
County Large Home Inspections
4.5(
55
)

Serving Dayton, MD and surrounding areas

Approved

In business since 1999

Free estimates

Customers say: Quick response

"Ted Riddick did an excellent job of performing a mold test in our basement, at the buyers request. I was very leary at first, because we recently cleaned the carpets and were concerned and/or confused that mold could be in our basement. We certainly would have known if we had mold in our basement or water coming causing a mold situation. Needless to say no mold was found, and my worries were alleviated. Mr. Riddick is a seasoned inspector, with a deep knowledge all areas of home inspections. He was professional, kind, did a great job."
Response time10 mins
Recommended by90%of homeowners
Avatar for D & H Demolition, LLC
D & H Demolition, LLC
5.0(
11
)

Serving Dayton, MD and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

Leading the industry by providing a comprehensive service to residential & commercial clients in need of selective & structural demolition , hazardous material abatement and disposal , as well as mold remediation services. Call or click for your FREE estimate today!\n

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+9

Response time8 hrs
12 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for JWH Inspections
JWH Inspections
5.0(
1
)

Serving Dayton, MD and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

Hello my name is Jason William Hornung. Buying a home is a big investment. I want to help you make a well informed decision. I have been in the residential construction field for 17 years, and have an intimate knowledge of the homes in our area having done so much work in them myself. I stay continuously trained studying current information to give the best reports out there. I've seen many things that other inspectors have missed both as a home inspector and a contractor. My inspections meet or exceed the ASHI standards of practice. WWW.Homeinspector.org/standards WWW.JWHInspections.com

Home Inspection
Home Inspection
Home Inspection
Green Certified
Radon Certified

+3

Response time2 hrs
Response rate100%
Recommended by100%of homeowners
Avatar for Inspections by Bob
Inspections by Bob
4.9(
145
)

Serving Dayton, MD and surrounding areas

In business since 2003

Free estimates

Warranties offered

"We have used Bob's service for our new house in the past year, from pre-drywall inspection to final inspection before closing.  We were very impressed by his capability to identify unusual construction issues that we cannot find and the builder would not admit.  So, to prepare my 1-yr. warranty repair list, my wife and I decided to invite him come back again. Not surprisingly, again he found important issues that we would treat as cosmetic.   <br /> For example, we saw many paint cracks and peeling off over the year, and we know most of them are caused by settling of the new house.  The builder will come by the end of a year to do cosmetic repair on these defects.  But after Bob's review, he found (using his moisture detector) one of them was actually caused by water leakage from a drain pipe of a bathtub behind the drywall.   <br /> Another example.  Our septic field has been suffering from soil settling for the past year, and the builder was asked to fix twice.  But it keeps on coming back after each fix, with even a larger magnitude (deeper settling).  The builder is going to come and fill it up again.  But Bob told us it is not caused by simple soil settling; it is due to soil erosion/intrusion deep into the septic pipe area, caused by a broken or dysfunctional geotextile.  So, I am asking the builder to fix the root cause this time.  Without Bob's advice, the builder would have fixed this in a same way as the last two times, and I will end up having a collapsed septic field again in a few months, after the expiration of 1-yr. builder warranty period. <br /> Initially I was asking Bob to come back and focus the inspection on heat insulation issues invisible to us (he has an IR thermal graph device).  But he was very honest to tell us we could save money by asking energy auditing service through our utility company at a much lower cost, which will also include blow-door infiltration test as well as IR thermal graph scan.  We did, and the energy auditor did an excellent job. He unexpected found gas pipe leakage in our basement (a big safety issue to us).  Our builder fixed the leakage, but their subcontractor did not have a hand held gas sensor the energy auditor had to confirm it was fixed properly.  So we asked Bob to come back and took a second look, using his gas sensor device.  To my surprise, Bob found two more leakages along the long gas pipe. <br /> So, my wife and I concluded that our money was well spent on Bob's service. <br /> <br /> <br />"
Recommended by96%of homeowners
Avatar for The Home Detective
The Home Detective
4.9(
47
)

Serving Dayton, MD and surrounding areas

In business since 1996

Free estimates

Emergency services offered

"Mr. Goldberg performed a radon test for me and did find that I had some moderate radon levels in my home. He's very efficient with what he does. He referred me to a guy named John Sweat to help me deal with the problem. I spoke with the guy and gave me a proposal but I have not heard from him in about a week and a half."
Recommended by97%of homeowners
Avatar for G M D Construction INC
G M D Construction INC
4.9(
98
)

Serving Dayton, MD and surrounding areas

In business since 1985

Free estimates

Warranties offered

"Mike and team were very knowledgeable and patiently answered all of my questions (and I always have a lot of them when dealing with contractors). They know their stuff and didn’t oversell or make false promises. I already had a mitigation system in place over my sump pit that came with the house, but it wasn’t adequate to service the multiple slabs that make up my foundation. Mike suggested a stepped approach to deal with the “hot spots” in the house and then re-assess whether additional action was necessary. They installed a clear lid over my sump and fixed the trap in my pit so that the existing fan was actually pulling suction on the foundation (and not the open drain from my exterior stairs). They also installed a second system that serviced two slabs and vented out through the back of the roof. Finally, they sealed up some cracks and holes around the foundations. Mike found a solution that was sensible from an aesthetics perspective as well as functional. The pipe runs through my entryway closet, and is as hidden and cleanly installed as I could have hoped for. We had a difference in opinion on how the finished roof flashing should have been done (more from an aesthetics perspective), but it’s on the back of the house behind the chimney so I wasn’t overly concerned about it. The system has reduced my levels to around 1pc/l down from a previous average of about 8 pc/l. So definitely within acceptable levels. I’m only a month in, so will continue to monitor over the next year to determine if any seasonal impacts require further action. I would definitely recommend them and plan to use them again if I need to (although I hope I don’t have to). If you are looking at this and don’t have your own continuous radon monitor, I recommend picking one up."
Recommended by98%of homeowners
Mitchell Home Inspections, LLC
5.0(
86
)

Serving Dayton, MD and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"I contacted Mitchell Home Inspections due to a positive referral from a friend. The inspector (Cliff) arrived early and was very knowledgeable and polite. He did a really thorough inspection and the report was well written with many pictures, notes, and findings. One of the most important things he did was to inform me that he observed radon mitigation systems on the surrounding homes. Based on this, I requested that he perform the radon test and we discovered that our home had a very high radon level. If he did not mention that, my family would be putting ourselves at risk for lung cancer (due to radon) without even knowing it. Now we have the mitigation system in place so we can sleep well and safe. THANK YOU CLIFF!!"
Recommended by100%of homeowners
Avatar for Pro Spex Home Inspection Services
Pro Spex Home Inspection Services
4.9(
333
)

Serving Dayton, MD and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Fantastic these guys were professional and thorough and very informative every step of the way. I highly recommend anyone looking for a home inspection and radon inspection termite inspection these are the guys to go to!"
Recommended by95%of homeowners
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FAQs for radon gas testing projects in Dayton, MD

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 Dayton, MD homeowners’ guide to radon gas testings

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