I rate this service 5 STARS!! From the beginning to the end has been excellent. When I contacted them to get a quote they immediately mail me some panflets that were very helpful to understanding how mitigation of Radon is important, how it works and its health impacts. Then Cory came to do the quote, it was like having a friend over, he was super friendly and knowledgeable in a very non-condescending manner. He took a look and pointed out the best route to proceed. When the installers came Paul and Dylan, they had the same happy friendly attitude (this talks a lot about the company, when the company is good it reflects on their employees). The installation was very challenging, long story short the hole on the ground had to be in between pipes of in-floor heating but Paul and Dylan nailed it, they brought their thermal camera and high quality equipment to finalize the work. I pointed out a few concerns and Paul answered my questions showing his knowledge of building code. Few weeks have passed now and I was reached by them again to see how everything was working. I have placed a radon meter in my basement and so far the readings have gone lower,. I am very happy and now I feel safer at home. Thank you Groundworks! keep the work up I totally recommend you.