Not sure if this is the correct forum, but I'll try anyway.
I'm have a barn built and once the barn is done I'm planning to finish part of it as a small apartment. The barn should be delivered later this month, then I'll need to have the plumbing done and concrete work. I had planned to have the plumbing for kitchen/bath/etc run under the concrete slab (which I assume is normal), but was wondering if there were any other options to avoid having it under the concrete.
I guess my reason for asking is because I don't like not having access to the pipes in case something breaks from a freeze.