The floors would have been redone after Harvey so what, 6 years ago? This is an idea of where it is in our home, my back is essentially at the front door. It couldn't be further from the edge of the slab or from a water source so I'm confident the slab has moisture from the ground because we have been absolutely saturated. As a matter of fact I need to do some concrete repair or put a drain at the base of a retaining wall to try and stop some of the moisture that bleeds on to our paved areas.