They solved the problem of water seeping through the basement block walls into the basement. This was a remodeling expansion that was added about 10 years ago with a French drain covered with gravel along the outside wall. The inside concrete floor was poured over PVC pipes, which lead to the sump pump, and were covered with gravel. Despite all the precautions, we still had some water seeping into the basement-not a lot but enough to not store valuable items in that area. The crew of 4-5 men moved things carefully out of their way, covered everything with plastic drop cloths, set up a negative air device to draw out the dust and proceeded to jackhammer a trench along the inner walls. They relocated the sump pump to a more central position eliminating the need for a second pump-for a savings of $500 from the original estimate. A plumbing inspector wasn't available that day to view the work so the crew finished as much as possible that day. The next day the inspector approved the open drain work so a crew of 3 men then concreted the floor and did an amazing and thorough clean up job. All the debris and concrete was transported in 5 gallon buckets through my Bilco door opening. The final cleanup was sponging the floors to remove as much dust as possible and they even washed the Bilco wooden steps from all the dirt/dust. It was truly more of a job than I would have imagined. I expected to spend a day or two cleaning up but after waiting 7 days for the concrete to harden, I began moving my workshop into the new area. I couldn't have been more pleased with the job and most enthusiastically endorse this company.