Replumb a slab-on-grade home
Replumbing a slab-on-grade home replaces aging or failing supply and drain lines that run inside or under the concrete slab.
How replumb a slab-on-grade home actually works.
Replumbing a slab-on-grade home replaces aging or failing supply and drain lines that run inside or under the concrete slab. Most Northeast Florida 1960s–80s homes were built with copper supply lines and cast-iron drains; both have service lives that are now expiring (copper pinholes from chemistry, cast iron corrodes from inside). Replumbing options include overhead reroute (running new PEX in the attic and dropping to fixtures), slab core-and-replace (cutting the slab to access existing lines), or a hybrid.
Overhead reroute is the most-common modern approach because it doesn't disturb the slab and avoids the dust and disruption of slab cutting. The trade-off is some loss of attic space and visible PEX in some utility areas.
The execution details that decide outcome.
Overhead vs. slab-cut decision. Overhead is faster and less disruptive; slab-cut is sometimes necessary for drain reroutes.
Hot water recirculation opportunity. A replumb is the right time to add a recirculation loop for instant hot water at far fixtures.
Existing fixture connection compatibility. Old fittings may not match new line sizes; budget for connection adapters at every fixture.
Other general remodeling outcomes I've built.
Read the Clay County whole-home remodel guide.
Tier-by-tier costs, the full permit walkthrough, and the FAQs Mark hears most often.
Read the guideRecent field notes.
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