In a beach home with older copper under the slab, a pinhole can eventually open somewhere beneath the floors. The signs are the usual ones, a warm spot, a climbing bill, the sound of water with every tap closed, and it's natural to worry when you notice them. In most cases the options are easier to live with than people expect.
The approach is the contractor's decision on each job. Detection equipment can listen through concrete to find the leak without touching the slab, and everything after that flows from the finding. Sometimes the right fix is an opening at the leak. When the contractor finds it fits, the reroute can be the better choice, abandoning the failed line under the slab and running its replacement overhead, through the walls, leaving the concrete sealed.
The conversation covers the bigger picture too. A pinhole in vintage pipe can be a reason to look at the whole line, and when there is a pattern, the options, up to and including a repipe, get laid out plainly with their true tradeoffs. The decision and the timing are yours, and a licensed contractor performs the work when you say go.
