When a Jacksonville dock, boathouse, lift, or patio near the water sinks or tilts, the fix is usually helical piers down to firm soil, or polyurethane to fill voids underneath.
866-398-9323Licensed seawall specialists — FL · GA · SC
Seawall Repairs by Solid Foundations provides marine foundation repair in Jacksonville, FL for riverfront homeowners, HOAs, and marinas. Typical projects include leveling boathouses and lifts on the St. Johns, lifting sunken patios behind creek bulkheads, and adding piers under sagging docks along the Ortega River. Call 866-398-9323 or use the quote form to book a free on-site inspection.
These almost always trace back to soft soil that can't carry the weight or soil escaping through the bulkhead.
Waterfront soil in Jacksonville takes a beating that inland lots don't:
Anything resting on the top layer alone can keep sinking. The lasting fix moves the load down to firm ground. We start by finding where that firm layer is on your lot, because guessing leads to piers that stop short.
Steel shafts with screw plates are turned into the ground until torque readings show they've reached soil that can carry the load. Then we bracket them to the structure and lift it back toward level. They work under docks, lifts, boathouses and decks. See helical pier installation.
Where soil has washed out under a patio or boathouse slab, we inject polyurethane to fill the gaps and often lift the slab back into place.
Rotted, borer-damaged or storm-struck pilings can be wrapped, jacketed or supplemented.
If soil is leaking through the bulkhead, we pair foundation work with bulkhead repair in Jacksonville so the ground stops moving.
Sometimes a sagging boathouse or dock is too far gone to level. If it has to be rebuilt, City of Jacksonville zoning rules apply (City of Jacksonville)):
We keep repairs inside the existing footprint where we can. For full rebuilds, see marine construction in Jacksonville.
In Jacksonville, figure on $700–$2,000 per helical pier and $8–$25 per board foot of void fill. Most residential marine foundation repairs come to $5,000–$25,000, depending on the number of piers, depth to firm soil, and access.
See our Jacksonville seawall repair page for other local services. We also do this work in Brunswick, GA.
Often, yes. We check whether soil washed out underneath or the slab settled, then fill voids or add piers to lift it back toward level.
As deep as it takes to reach load-bearing soil, which varies by lot. Torque readings confirm each pier's capacity as it goes in.
City zoning caps boathouses at 900 square feet and 15 feet above mean high water. Anything over that won't be approved as a standard boathouse.
Usually. If the pilings are sound, we add support and re-level. We only replace damaged pilings.
Licensed, insured, NCFI-certified. Serving Florida, Georgia & South Carolina since 1996.
866-398-9323