Sometimes its hard to what is under the concrete floor on a basement. It would be great if all floors were poured the same way, but they aren't. In this home, our crew found a thinner slab than they had anticipated. Instead of using our WaterGuard drainage pipe system, they were able to use FlowGuard. DryZone has a solution for any water problem in a basement, so we can easily adjust when things like this come up.