The Crack Doctor fixed two cracks in the foundation that had been leaking every time there was a heavy rain. Since Michael's visit, we've had plenty of rain and the fixes have held up perfectly. There was another leak with no visible crack so Michael returned to our house to check it out. Again, he saw no crack so asked us to contact him when it rained again. It rained that evening so we sent 3 pictures to him. When he had a look, the leak's source ended up being a window - easily fixed with re-caulking. We very much appreciated the prompt follow up and response to our leaking issues.