G M D Construction INC

They were very excellent.

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We have what might be considered a complicated radon abatement project. Half of the house is over a crawlspace and half is over a basement. When he heard about the project, he asked where the house is located? When I said just inside I-495 he said he doesn't work inside the Beltway. He shouted into the phone, "Doesn't matter, can't work there, it's a mental thing." I replied, "OK, thanks very much," and hung up. The whole call seemed pretty weird. I wouldn't recommend him.

G.M.D. Construction, Inc. dd excellent work. They installed the system exactly as described. They even did a fantastic job of hiding the piping so that it doesn't show in the furnished areas of the basement. Outstanding work, all around.

Everything went very well from the on-time arrival to the installation to the information provided.

My house had an existing radon fan installed in the attic space above the master bedroom. This fan created noise and vibrations that I found annoying, making it hard to sleep. Mike visited and first tried to replace the fan with a newer model, to see if that would reduce the noise. (The previous fan was probably 20+ years old.) However, this did not eliminate the noise to my satisfaction, so I asked Mike whether the fan could be installed outside the house. He provided a quote for an external install but suggested I wait a few days to make sure the noise was still bothering me. In the end, I decided the noise was still too much. On a subsequent visit, Mike and a second worker installed a new radon remediation system outside of my house (re-using the new fan that had just been installed in the attic to save some money). This involved abandoning the old system, drilling a hole into the basement floor, running power outside the house, and running pipe up along the outside of the house. The work took about 2 hours, and they did an excellent job -- top-notch in every way. I couldn't have been more pleased. In addition to a very professional installation, they respected my house and were careful not to track mud in the house, cleaning up any mess they had made as part of the install. A follow-up third-party radon test needs to be performed to make sure the new system is effectively removing radon, but after a couple days, my own digital radon monitor shows levels remaining low. I wouldn't hesitate to recommend Mike for any radon remediation needs. His company does superb work and he is very pleasant to deal with.

A little slow to respond. From then on a professional job done by the owner of the company. No complaints.

This was a professional, informative, and satisfying business experience from start to finish. They made what I thought was going to be a complicated project simple and painless. Mike came out to survey the job and provide an estimate. He is very knowledgeable, personable, and thorough. He went over what we could expect and how the project would go. For both the initial appointment and the performance of the work they were on time and on schedule. If all contractors worked the way GMD did, the world would be a much better place. Highly recommend.

I puchased a Kidde radon test kit from Lowe's and had a 15.4 level which I considered very high given it said anything above 4 was bad. Contacted GMD by email through the Angie's List website and was contacted within 24 hours. Set up an appointment for the following day after work. They arrive on time and after examining the layout of the basement explained exactly what they proposed doing and the cost. I was told up front that it was possible that the proposed solution might not be sufficient with an explanation that made sense to me. They also gave me the cost if additional work was needed. They did not recommend doing the second step unless the test results after installing the basic system didn't lower the levels below 4. I did not sign a contract that night and did not feel pressured to do so. When I called later to arrange for the work to be done I was able to setup an appointment within less than a week. They came on the appointment date and did the work in less half a day. They cleaned up after themselves and explained how to monitor the system. As part of the cost they arranged for an independent contractor to come come to the house and perform a detailed radon test a few days after they did the work. That test has been performed and I'm happy to report that the results of the test showed radon levels averaging 1.6 over a 48 hour period. The report shows reading taken every hour. It was suggested I buy a test kit every two years to ensure the levels remain low. Though I wasn't happy about having to have the work done to being with, GMD made the experience as painless as possible. I highly recommend them if you need a radon abatement system.

Johnathan came out for the estimate, reviewed the property, and discussed the options with us clearly and concisely. He indicated that a radon system installed external to the townhouse would be an eyesore as there was no efficient landscaping to obfuscate the fan and pipe, we agreed. The option we went with was a bit more expensive. Mike and Johnathan came out on that Thursday and started the installation despite some confusion on my end as to when the upfront and balance of the cost were due. They were on time, fast, efficient, and professional. GMD ran the mitigation system up through the center of the house through a wall cavity into the attic where the fan was installed and the stack exited like an air line for plumbing would exit. The only qualm I have about the work is that the flashing boot around the stack was bent a little on the low end, and it curves up a bit. This will not cause a problem, and is only a cosmetic qualm. In the end you cannot even tell that a radon system is in the house unless you know exactly where to look to find it. The radon levels measured went from 11.3 pCi/L measured at the home inspection to 0.2 pCi/L measured 3 days following the installation.

I am very happy with GMD Construction Inc. They were recommended by an inspector whom I trusted and so I had them do that. It was recommended that I use a radon system not to control radon but because of the moisture. They did the job that they were supposed to do. My basement is now dry. The radon system is working very well. It was just one person who came and did the work. He finished the work in one day and everything was fine. I would definitely recommend them to others. I would use their service in the future.

They didn't end up doing the work. The man seemed very knowledgeable, almost too much so for us.

It could not have been a more pleasant experience.

Mike gave us a detailed estimate, explained the need for this mitigation and was careful to explain that further tests and work might have to be done if his initial installation did not lower the radon amounts to below the required threshold. He and his son did the installation in one day, the work was done with excellent quality and attention to detail. They had great respect for our home and when the installation was done they cleaned up everything. An independent home inspection contractor tested for radon afterwards (included in the contract) and the results showed that the initial installation was completely effective and no further work was necessary. We were completed pleased with the whole experience.

The service was prompt, expeditious, and affordable. Mr. Dietz has a reputation among other radon mitigators as being the best around, the grand-daddy of radon gurus. His assistant was also very knowledgeable; ie, not just a lackey. One caution: If you have pets in the area where they will be working, be sure to find a separate place for those pets for the duration. They work very quickly and, not surprisingly, they do not want to be responsible for accidentally letting a pet outside.

Mike from GMD was very professional. The install was done in less than 2 hours. They were on-time, on-budget, and left the premises just as they found it. Overall it was a pleasure having them do the work. I still have to have the radon levels retested so ensure that the radon level has been lowered which may take another week or two.

Excellent; very responsive - got the work scheduled within a few days of getting our test results; actual work was done on time, tidily, cleaned up completely, decent price, very knowledgeable about radon; I highly recommend Mike and his company.

The experience was excellent. He was highly professional. The only downside was that you did have to ask him a lot of questions and he didn't explain in detail. He was punctual and professional. I would definitely use him again.

I tough 'surprise' to hear we needed extra work, but he was right, and got the radon levels down from very high to below EPA standards.

We are very pleased with Mike's work and expertise. We checked many other companies and did a lot of research on the web. We wanted this job to be done right, since RADON abatement was important to us. Mike gave us good advice and the best proposal overall. He concealed the PVC pipe going through the garage and up to the roof, while every other contractor would run the pipe outside of the house. He also used a better type of PVC pipe. We checked 4 other proposals and thought Mike's solution was better and aesthetically more attractive. His price was about the same as anybody else, but he put more thoughts and work in the solution.

THIS COMPANY WAS A PLEASURE TO WORK WITH. THEY WERE PROMPT AND SPEEDY IN THEIR WORK. THE PRICE WAS REASONABLE AND WE HAD NO PROBLEMS WITH THIS TRANSACTION.