sealing conc can be either bldr's item OR flooring guy's - sometimes neither - just depends,,, tv concrete is not waterproof - it would have to be 5,000psi mix design to qualify for that,,, conc's porous & will draw 'up' water thru capillary action
absent leaks, a slight trench drain about the slab properly drained might resolve the issue - certainly can't hurt
we svce some atl town home units w/underfloor leaks - typically copper pipes spouting pinholes - that could also be a cause
newbie coming in may so still ignorant re tv const methods/materials
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