A Charleston seawall that has started to lean but still has solid sheeting can usually be stopped in its tracks with helical tiebacks, at roughly half the price of rebuilding it.
866-398-9323Licensed seawall specialists — FL · GA · SC
Seawall Repairs by Solid Foundations provides seawall reinforcement in Charleston, SC for homeowners, HOAs, and commercial properties. Typical projects include helical tiebacks on bulkheads pushed out by Irma's storm tide, walers on long harbor-side runs, and new anchors where old tie rods have rusted through on Ashley River walls. Call 866-398-9323 or use the quote form to book a free on-site inspection.
It fits walls that are moving but not broken:
Walls with split sheeting or a blown-out toe need more than anchors. See bulkhead replacement in Charleston.
Back-to-back storm tides. Matthew pushed Charleston Harbor to 9.29 feet above mean lower low water in October 2016 (NWS Charleston). Eleven months later, Irma topped that at 9.92 feet, the third-highest level on record at the time. Two soakings that deep, a year apart, loaded the fill behind many walls well past normal. Some walls that looked fine afterward have been drifting outward ever since.
Heavier soil behind the wall. When the fill stays wet, it weighs more and pushes harder. Clogged weeps make it worse.
Tired anchors. Older creek bulkheads often rely on steel rods and buried deadmen. Decades of salt water thin those rods until they stretch or snap.
Steel shafts with screw-shaped plates are drilled through the wall at an angle and into firm soil, then tensioned and locked off. Each one acts as a brand-new anchor. On most homes, installation takes a day or two, and the yard is barely disturbed. Details on helical tiebacks.
The City of Charleston used micropiles to carry its rebuilt Low Battery wall. On private walls, we look at whether added vertical support makes sense alongside anchors when the soil is especially soft.
A beam along the face spreads anchor loads across the run so no single panel takes the strain.
We often add polyurethane void fill and relief drains so the wall isn't fighting the same pressure again.
| Reinforcement | Full replacement | |
|---|---|---|
| Typical 80-ft residential wall | $12,000–$35,000 | $40,000–$80,000 |
| Time on site | Usually 1–3 days | Usually 1–3 weeks |
| Disruption | Minimal | Significant |
| Approvals | Usually simpler | Engineering plus SCDES and federal review |
Reinforcing now and planning a replacement later is a sensible path for many owners. It spreads the cost over years, keeps your dock and landscaping in service, and gives you time to decide on materials and cap height for the eventual new wall. We'll give you an honest estimate of how many years the sheeting has left so you can plan around a real number.
Charleston's creek-front lots often grade from sandy upland into soft pluff mud at the marsh edge. An anchor set in that mud won't hold much. We push tiebacks through to firmer soil and read the installation torque on every one to confirm capacity. If your dock or deck is settling too, see marine foundation repair in Charleston. You'll find our other local work at Charleston seawall repair.
We also reinforce seawalls in Beaufort and Hilton Head.
Usually not. If the sheeting is intact, tiebacks can stop the movement, and some walls can be pulled partway back. The earlier we see it, the more options you have.
We map large roots, utilities, and irrigation before drilling and angle the anchors to avoid them.
It depends on the scope. SCDES treats some work as normal maintenance and repair, while structural changes can need a critical area permit. We check first.
The anchors are permanent. The rest of the wall's life depends on the sheeting's condition, and we'll tell you where it stands.
Licensed, insured, NCFI-certified. Serving Florida, Georgia & South Carolina since 1996.
866-398-9323