Seawall Replacement

Replacement is the right answer when the load-carrying parts of the wall have stopped carrying load. Not when the wall looks tired — tired is often repairable — but when the piles, the embedment, or the tieback system are past restoring.

Where the line sits

We are looking at four things, and the wall’s future depends on all of them being sound enough to build on.

Piles. Section loss, borer damage in timber, advanced spalling in concrete. Jacketing restores a pile with a sound core. It does not restore one without.

Embedment. Toe scour removes the depth the wall depends on, and it happens below the waterline where nobody looks. A wall whose embedment is substantially gone is working on borrowed time whatever you do at the top.

Tiebacks and anchors. Isolated failures get replaced. A system that has corroded through along its length means the wall’s remaining life is short.

The cap, as a structural element. A cap that has separated from the piles is a kerb. It can be rebuilt — but if it failed because everything under it failed, the cap is not the project.

When one of those is marginal, repair usually still wins. When several are gone, repair money goes into a structure that is leaving anyway, and we will tell you so.

Two approaches

Build in front. The new wall is driven waterward of the existing structure, which stays in place or is cut down below grade. This skips demolition, which on a developed waterfront lot is a meaningful share of the budget, and it keeps the old wall acting as a temporary retaining structure while the new one goes in.

The constraints are real: moving a structure waterward changes how agencies review it, and you need the room and the water depth to do it. Where it works, it is usually the better project, so we evaluate it first.

Replace on the existing alignment. The old wall comes out, the new one goes in on the same line. More disruption, more cost, and sometimes the only option the site or the permit allows.

Staged replacement

Where only a portion of the wall has failed, or where budget or access makes a single campaign impractical, we stage it. The critical detail is the joint between old and new — a junction between walls of different ages, materials and stiffnesses is one of the places soil most reliably finds a way out. It gets detailed as a joint rather than treated as the place where two jobs happen to meet.

What the project involves

The new wall is built as described in seawall construction — exposure-driven design, embedment, tiebacks to anchors outside the active wedge, toe protection, a structural cap, drainage. Around that:

• Demolition and disposal, where the old wall is coming out
• Protecting what stays — irrigation, landscaping, lighting, pool decks, hardscape
• Dock coordination. Docks usually tie into the wall, which means sequencing and sometimes temporary removal. If the dock is also tired, replacing both together is the cheaper path.
• Toe protection, sized for your exposure
• Re-establishing grade and drainage behind the new wall
• Restoration of the work corridor

Permits

A replacement is reviewed differently from a repair in place, and a replacement on a new alignment differently again. FDEP, the U.S. Army Corps of Engineers, the St. Johns River Water Management District and your county or city building department may all be involved. Requirements change — confirm current requirements with the reviewing agency. We handle permitting on the projects we build, and permit review is normally the longest item on the schedule.

Call (904) 327-3931 or request a free estimate. A marine inspection is what settles repair versus replacement in writing.