When a Marco Island dock sags, a lift tilts, or a lanai sinks near the canal, the fix is usually to carry the weight down to firm soil with helical piers or to fill the voids beneath the slab.
866-398-9323Licensed seawall specialists — FL · GA · SC
Seawall Repairs by Solid Foundations provides marine foundation repair in Marco Island, FL for canal-front homeowners, condo associations, and marinas. Typical projects include helical piers under sagging docks on Collier Bay canals, re-leveling boat lifts that shifted in Hurricane Ian, and lifting settled lanai slabs along Marco Island seawalls. Call 866-398-9323 or use the quote form to book a free on-site inspection.
Most trace back to soft fill that can't carry the load, or soil escaping through the seawall.
Much of the island's waterfront was built, not found. The Deltona Corporation, led by the Mackle brothers, began developing Marco in the 1960s, dredging canals and filling land between them. Its first permit, for the Marco River area, came through in just nine days in 1964. By 1976 attitudes had changed: the Army Corps approved the Collier Bay area but denied permits to fill Big Key and Barfield Bay (The Mackle Company).
Homes in those filled areas sit on:
Anything resting only on the fill will keep drifting down. Shims and fresh concrete poured on top don't change that; they add weight to the same soft layer. A repair has to reach below the fill or firm it up from within.
Steel shafts with helix plates are screwed into the ground until torque readings show they've reached soil that can carry the load. We attach the structure and lift it toward level. See helical pier installation.
Beneath lanais and pool decks, injected polyurethane fills voids and firms up the soil. It can often raise the slab without demolition.
Damaged dock and lift pilings can be jacketed, wrapped, or supplemented.
If soil is escaping through the wall, we pair the work with bulkhead repair in Marco Island so the ground stops moving.
Typical Marco Island 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.
Usually not, if the repair stays within the existing footprint. Marco Island's code says repair or replacement within the existing footprint doesn't require a nonconforming dock to be brought up to current standards. Expanding a nonconforming dock does: the whole facility then has to comply (Marco Island Code §54-112). Adding a boatlift is treated separately from other expansions. That's why we design foundation repairs to stay inside your current layout wherever possible. For new docks, see marine construction in Marco Island.
We also handle marine foundation repair in Naples.
Often, yes. If the pilings are sound, we add support and re-level. Damaged pilings are replaced or supplemented.
Not if the work stays within the existing footprint. Expanding it would trigger full compliance.
The fill underneath is settling or washing out through the wall. We check both before recommending a fix.
Deep enough to reach firm soil below the fill, which varies from lot to lot. We verify each pier as it goes in.
Licensed, insured, NCFI-certified. Serving Florida, Georgia & South Carolina since 1996.
866-398-9323