Marco Island's waterfront homes sit on tidal saltwater canals that never stop working against their seawalls. When the ground behind yours washes out, we fill the voids and re-stabilize the soil — protecting the yard, deck, and dock above it. Free inspection.
We'll call you within 1 hour to confirm
Marco Island living happens on the water, and the value of these homes rides in large part on the waterfront — the seawall, the dock, the deck that steps down to the canal. Those walls hold back tidal saltwater that moves twice a day, every day. It's relentless, and it's hard on the soil behind the concrete.
Saltwater working in and out through weep holes and joints carries the fine sandy soil out with it. Over time that leaves voids behind the cap, and the expensive hardscape above — pavers, pool deck, dock approach — loses its base and begins to settle. On a high-value Marco waterfront lot, catching that early protects a lot more than the wall.
When the wall is still structurally sound, replacement is overkill. We inject expanding, waterproof polyurethane behind and beneath the wall to fill the voids and re-bind the washed-out sand, then seal the points where saltwater was pulling soil out. It protects the yard and hardscape without the demolition and long timeline of a rebuild. The full step-by-step method is on our seawall repair overview; on Marco the emphasis is the constant saltwater tidal load on Collier's canals.
Marco seawall repairs are priced by the actual damage. The factors that move the number:
The only accurate number comes from looking at the actual work. Your free, no-obligation inspection includes a written proposal — and for a deeper breakdown, see our seawall repair cost guide for Southwest Florida.
Protecting Florida homes since 1989 — family-owned, licensed, bonded, and insured, with more than 45,000 projects completed statewide and an A+ rating from the BBB. Rated 4.9 stars across 1,500+ five-star Google reviews. As a Foundation Supportworks dealer, we install engineered, warrantied repair systems — with a local rep who works your streets.
Warranty: Every seawall repair is backed by a written warranty; we review the exact terms with your free written proposal. Standard exclusions apply (e.g. Acts of God such as hurricanes and floods).
Yes — Marco Island and Collier County are part of my regular service area. The free inspection confirms your canal and exactly what your wall needs.
Saltwater is precisely why the soil behind Marco seawalls washes out so steadily. The polyurethane we inject is waterproof and does not break down in that environment, so it holds the ground where soil could not.
That is much of the point. The voids behind the seawall are what let the hardscape settle; filling and stabilizing that soil supports the deck, pavers, and dock approach above it.
Seawall work in Collier County is regulated, and permitting depends on the scope of the repair. We will explain what your specific job requires before any work begins.
On a Marco Island canal, a small void behind the wall puts expensive hardscape at risk. Get a free, no-obligation inspection and a written proposal.
I repair waterfront seawalls across Southwest Florida.