This was a very good experience, from beginning to end. The estimator thoroughly explained our options and provided an easy-to-understand contract. The installers arrived on time and did a great job. For us, it required a huge amount of work in preparation, however, it was worth the effort. The price was more than we had hoped to spend, but the result makes it a sound investment. Although we did not have major water infiltration in our basement, our 100 yr. old home with cement block walls and cement floor continued to experience periodic water seepage. The result was a ton of mold, making the air unsafe throughout the entire house. We are pleased to report that in the almost two years since the installation, the project has eliminated the mold and it has not returned. As we understand it, there are two keys to this effort: (1) keeping all moisture contained behind the plastic liner; and (2) having a commercial grade dehumidifier to keep the humidity at or below 50%, which renders the mold inactive. The first task we had was to move everything 4 ft. away from the perimeter walls, to give them space to work. In our case, that involved a huge amount of work, including removing a long workbench which was bolted to the wall plus multiple shelving units. When they began work, they jackhammered about 6 inches of the cement floor out from the wall, where they installed the WaterGuard drainage system. That was a dusty project. After placing the plastic drain system into the trench, they covered it with fresh cement, doing a very good job. The next task was to attach the CleanSpace plastic to the walls, from the ceiling to the floor. This airtight seal directs any and all moisture into the WaterGuard. If and when the water actually flows down the walls, the WaterGuard system carries it to the sump, which pumps it outside. As mentioned above, the final key to the success of the system is installing a large dehumidifier, which can be set to whatever humidity level you determine. We were told, and find it to be true, that keeping it at 50% means that the mold can no longer grow. The crew was competent, efficient, answered all our questions, cleaned up completely and completed their work on schedule, which took two full days. We then went back to work to put everything back into place. As indicated at the outset, it was a lot of work, but since the result makes it possible to enjoy the fresh air of our basement for the first time, and improved the quality of the air throughout our home, our only regret is that we didn't do the project earlier. They recommend an annual flushing of the WaterGuard drains into the sump. You can hire them to come do this, however it's a relatively simple task you can do, simply inserting a garden hose at the 3-4 WaterGuard port access points and running the water for 5-10 minutes at each port.