When a dock, deck, or boat lift on Hilton Head starts to sag or tilt, the lasting fix is to carry its weight past soft marsh soil to firm ground, usually with helical piers.
866-398-9323Licensed seawall specialists — FL · GA · SC
Seawall Repairs by Solid Foundations provides marine foundation repair in Hilton Head Island, SC for homeowners, property owners' associations, and marinas. Typical projects include helical piers under sagging dock walkways on Skull Creek, re-leveling boat lifts on Broad Creek, and lifting settled patios behind lagoon bulkheads. Call 866-398-9323 or use the quote form to book a free on-site inspection.
Usually the cause is soft ground that can't hold the weight or soil escaping through the wall. On rental homes, guests are often the first to notice a bouncy walkway or a tilted lift, so it helps to ask your manager to pass those reports along quickly.
Hilton Head's creeks are lined with salt marsh, and the soil under it is pluff mud: fine sediment mixed with decaying cordgrass and microbes, thick and low in oxygen (S.C. Sea Grant). It's spongy, and it compresses under load.
A typical creek-front lot might have:
A dock landing or deck post that rests on the soft layers will keep settling. The fix is to reach past them. Adding shims or new blocks on the same ground only resets the clock, which is why we'd rather transfer the load once than come back every season to re-level the same walkway.
We turn steel shafts with screw-shaped plates into the ground until torque readings show they've reached firm soil. Then we bracket them to the structure and lift it toward level. They work for dock landings, lifts, decks, and small outbuildings. See helical pier installation.
Where soil has washed out under a patio or pool deck, polyurethane injection fills the gaps and can lift the slab back toward level.
Rotted, borer-damaged, or storm-struck pilings can be wrapped, sistered, or supplemented.
If the bulkhead is leaking soil, we pair foundation work with bulkhead repair on Hilton Head.
Typical Hilton Head pricing is $700–$2,000 per helical pier and $8–$25 per board foot for void fill. Most residential marine foundation repairs run $5,000–$25,000, depending on pier count, depth to firm soil, and access.
After Hurricane Matthew, Beaufort County cleared 33 vessels and about 16,700 cubic yards of debris from its waterways, including broken and sunken docks (Beaufort County Disaster Recovery). If your dock is destroyed, SC Regulation 30-12 generally lets you rebuild it to its previous layout as long as the work is finished within five years of the event. Repairs that stay in the existing footprint are usually simpler than expansions. For a rebuild or new layout, see marine construction on Hilton Head. Visit Hilton Head seawall repair for our other services.
We also handle marine foundation repair in Savannah and Beaufort.
That's usually where upland soil gives way to marsh mud, the weakest ground on the lot. Helical piers carry that end to firmer soil.
Often. If the pilings are sound but have settled, we add support and re-level. Damaged pilings get replaced or supplemented.
SC rules generally allow rebuilding to the prior layout within five years of the event, with extensions for extenuating circumstances.
Often, yes. Polyurethane injection or helical piers can bring it back toward level once we've dealt with any soil loss through the wall.
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