Apple Valley’s tract homes sit on concrete slab foundations, and the expansive desert soil underneath shifts every time it dries out or soaks up rare rainfall. That movement puts constant stress on the copper and galvanized pipes running beneath the concrete, and once one of those lines cracks, water can travel for weeks before you notice a warm spot on the floor or a spike in your water bill. Left alone, a slab leak can undermine the foundation itself and turn a plumbing repair into a structural one. The good news is that a slab leak caught early is a manageable fix, not a rebuild.