Why Seawall Damage
Happens in Florida
Seawalls are constantly exposed to water pressure, soil movement, saltwater corrosion, and fluctuating tides. Over time, these forces weaken structural components and the soil supporting the wall. When drainage systems fail or anchoring systems deteriorate, the wall can begin to crack, lean, or shift.
Understanding what’s happening behind the wall is critical to preventing larger structural failure.
Broken Filter Fabric
Filter fabric is installed behind many seawalls to allow water to drain while keeping soil in place. Over time, this fabric can tear, clog, or deteriorate due to age and saltwater exposure.
When the filter fails, soil begins washing out through cracks or joints in the wall. As soil escapes, voids form behind the structure, increasing hydrostatic pressure and reducing stability.
Once soil loss begins, damage often accelerates quickly without corrective action.
Clogged Weep Holes
Weep holes are designed to relieve water pressure by allowing trapped water to drain through the wall. If these drainage points become blocked by debris, sediment, or marine growth, water accumulates behind the seawall.
This buildup creates hydrostatic pressure that pushes against the wall structure. Over time, excessive pressure can cause cracking, bowing, or forward movement.
Maintaining proper drainage is essential to protecting long-term seawall integrity.
Cracks & Openings in the Wall
Small cracks may appear minor, but they allow water to pass through the wall and carry soil with it. As erosion continues behind the structure, voids expand and supporting soil weakens.
In Florida’s coastal and canal environments, constant wave action and tidal changes increase stress along these weak points. What begins as a hairline crack can evolve into significant structural separation if left unaddressed.
Evaluating wall cracking early helps prevent larger stabilization issues.
Failing Tieback or Deadman Anchoring Systems
Many seawalls rely on tiebacks or deadman anchors to resist soil and water pressure. Over time, these anchoring systems can corrode, loosen, or fail due to age, saltwater exposure, or soil instability.
When anchors lose strength, the wall may begin to lean, bow, or separate at joints. Structural stress increases as lateral forces are no longer properly counteracted.
Identifying anchor system failure early can prevent progressive wall movement and reduce the likelihood of full replacement.
Noticing Signs of Seawall Movement or Erosion?
Schedule a professional inspection to determine what’s causing the damage and protect your shoreline before structural failure progresses.