Cape Coral Docks & Boat Lifts, LLC Seawall Repair & Reinforcement Division (239) 233-3931
Warning Sign

Cracks Or Spalling In The Cap

Cracking, flaking concrete, or exposed rebar in your seawall cap is often the most visible symptom of a problem that started below the surface.

The cap is the part of your seawall you see every day — so it's usually the first place damage shows up, even when the real cause is happening out of sight below it.

What causes cracking and spalling

  • Corroding rebar. Saltwater intrusion causes the steel reinforcement inside the concrete to rust and expand, cracking the concrete around it from the inside out.
  • Structural movement. If the wall below the cap is shifting from soil loss or anchor failure, the cap cracks as it's pulled out of alignment.
  • Age and weathering. Years of sun, salt, and moisture cycling naturally break down concrete over time, especially on older seawalls.

Why you shouldn't wait

Once rebar is exposed to air and saltwater, corrosion accelerates fast. A small crack today becomes a larger structural repair within a season or two if the underlying cause isn't addressed.

How we fix it

Isolated cracking often just needs cap removal and replacement. If the cracking is a symptom of movement below, we address the structural cause first — anchoring, foam injection, or reinforcement — then restore the cap.

Related Warning Signs

Other things worth checking

Not sure how serious it is?

Tell us what you're seeing and we'll tell you exactly what's happening — and how to fix it.

Call (239) 233-3931
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