We hired SES to address moisture and mold issues in our two crawl spaces. Overall, I am happy with the service received and the final product, though I note that there were a few scheduling hiccups along the way. INITIAL APPOINTMENT/SCOPE OF WORK Scheduling the initial appointment was easy. The SES representative was on time, knowledgeable, spent a good amount of time examining our two crawl spaces, and explained the options to us in understandable terms. He recommended crawl space encapsulation, a dehumidifer, sealing the vents and rim joist with spray foam, insulating the walls with foam board, removing our old/moldy fiberglass insulation, and mold treatment. We chose SES -- despite being the 2nd most expensive quote we got of 4 quotes received -- because they offered the most comprehensive service for our needs (including mold removal/treatment). I did not feel that SES used aggressive sales tactics or tried to push anything that I did not need (which I heard was somewhat common in the basement waterproofing industry). SCHEDULING & INSTALLATION SES estimated 3 days for the job and was able to schedule a crew to perform the work within 1.5 months (despite significant rains in the NoVA area). The night before the appointment, I received an email saying there would be a one-day delay because the crew had to finish a prior job. This was understandable, but if the job had taken the full 3 estimated days, I would have had to change my work schedule to make it work (it all worked out but I note it since this could be a drawback for others who do not have flexibility on dates / work without much advanced notice). The installation itself was smooth. The 3-man crew was timely, courteous, very professional, and cleaned up after work on each day. They completed everything in 2 days (instead of the projected 3 days). SES then had to schedule an electrician to come out to do the electrical work necessary to complete the dehumidifer installation. There was a minor hiccup here in that SES scheduled the electrician without first communicating with me about the date. I found out about the appointment only when I called SES of my own accord to ask when they were planning to send the electrician (since I had not heard from them about a date). Fortunately, I was able to work from home to make the appointment work, but communication could have been a bit clearer. FOLLOW-UP I was impressed with SES's follow-up. An SES representative came back to my house a month after the installation -- as he promised -- to follow up and check on the humidity levels in my crawl spaces. At that point, we decided to do additional work and install a dehumidifer in our second crawl space as well. This required drilling a hole in the foundation wall and installation of an electrical outlet. Here, again, though, there was a minor hiccup on scheduling the work. SES scheduled an electrician to come out, but when he arrived, he realized he was not insured to drill the hole necessary for installing the electrical outlet. This meant SES then had to schedule another date/time for someone else to first come drill the hole, and then another date/time for the electrician to come back. Luckily, I had family in town staying with me and thus some flexibility as to scheduling. But again, communication could have been clearer and prevented the hiccup. That said, SES accommodated me when I had to switch the date of installation of the additional dehumidifer, and the installation itself went off without a hitch. I am also very happy with the professionalism of the installation crew that came out to install the second dehumidifer. As for whether all of this work solves my moisture & mold problems, I am cautiously optimistic. It all looks very good, and the dehumidifers are humming away. I'll have to wait for the next rainy season to see.