Seawall Erosion

Q: After heavy rain, I’ve noticed sinkholes forming behind my seawall — is this erosion fixable without replacing the entire wall?

Yes. LUX uses expanding polyurethane grout to fill underground voids and seal water paths behind the seawall. This advanced process strengthens weakened soil, stabilizes the structure, and prevents recurring washout. The result is a durable, watertight barrier that stops further seawall erosion and protects your waterfront from Florida’s tidal pressure and coastal flooding.

Q: How to stop seawall erosion in Jacksonville, FL?

In Jacksonville’s coastal neighborhoods, seawall erosion often starts with small voids or soil washout behind the wall. LUX Foundation Solutions stops the damage using polyurethane grout injection , a long-lasting, non-invasive repair that fills gaps, seals leaks, and stabilizes the soil. This process restores your seawall’s support and prevents further erosion caused by tides, storms, or groundwater pressure — protecting your property and waterfront investment.

Q: Which areas of Florida are most at risk for coastal erosion?

Coastal cities like Palm Coast, St. Augustine, and Jacksonville are especially vulnerable to seawall washout due to rising sea levels, tidal surges, and sandy soils that easily wash out. Homes near canals, rivers, or open bays face higher erosion risks year-round. Experts at LUX specialize in seawall erosion control designed specifically for Florida’s coastal conditions — preventing washout, sinkholes, and property loss before they become costly issues.

Q: How do seawalls cause erosion in St. Augustine, FL?

When improperly designed or aged, seawalls can reflect wave energy downward, scouring the soil in front of or behind the wall. In St. Augustine’s tidal zones, this often leads to erosion behind the seawall and uneven settling. LUX Foundation Solutions prevents this by sealing leaks , strengthening the soil with polyurethane grout, and restoring proper drainage — ensuring your seawall absorbs, rather than redirects, wave impact over time.

Q: How much does it cost to repair seawall erosion in Jacksonville, FL?

The cost to repair seawall erosion in Jacksonville and surrounding areas varies depending on the extent of soil loss and wall condition. Most homeowners save significantly with polyurethane grout injection , which is faster and more affordable than full seawall replacement. LUX Foundation Solutions offers free estimates. We also offer flexible financing options , ensuring every Florida homeowner can access reliable, lasting seawall erosion repair without budget strain.

Q: What should I do if I notice erosion behind my seawall in Palm Coast, FL?

If you see soil loss, sinkholes, or water pooling behind your seawall in Palm Coast, act immediately. These are early signs of void formation and structural weakening. Experts at LUX perform detailed assessments to identify the erosion source, then use polyurethane grout injection to compact the soil and seal leaks. This stops washout, prevents collapse, and strengthens your seawall to withstand Florida’s seasonal rains and tidal pressure.

Stop shoreline erosion before it damages your property.

Erosion behind your seawall can weaken its foundation and threaten your property’s shoreline stability. In Florida’s coastal environment, constant wave action and tides accelerate soil loss. Learn how to stop soil washout and protect your waterfront property before damage worsens.

What Is Seawall Erosion?

Seawall erosion happens when water seeps through or around your seawall, washing away the supporting soil behind it. Over time, this creates voids, sinkholes, and pressure that weaken the structure.

In Florida’s coastal environment, constant tides, rainfall, and saltwater accelerate the erosion process. Without repair, this soil loss can cause seawall leaning, cracking, or collapse — putting your property and shoreline at risk.

LUX Foundation Solutions specializes in repairing seawall erosion using polyurethane grout injection to stabilize soil, seal leaks, and restore long-term stability to your seawall and waterfront foundation.

Schedule a free estimate

Signs of Seawall Erosion in Florida

Seawall erosion doesn’t always show obvious damage right away. In Florida’s coastal areas, soft soils and constant water movement slowly wash away the ground supporting your wall.

Watch for these early signs of seawall washout before the problem becomes severe:

Soil depressions, sinkholes, or voids forming behind the seawall.
Standing water or puddles near the wall after high tide or rain.
Gaps appearing between the seawall cap and panels.
Cracks or holes at the wall base where water seeps through.
Uneven or leaning wall sections caused by soil loss beneath.
Soil loss or settling along the shoreline where the ground used to be level.

If you notice these symptoms, your seawall likely needs immediate erosion repair. LUX Foundation Solutions offers free seawall assessments and stabilization services to prevent further washout and safeguard your shoreline.

Soil Depressions or Sinkholes Behind Seawall

Standing Water or Puddles Near Seawall

Gaps Between Seawall Cap and Panels

Cracks or Holes at Seawall Base

Leaning or Uneven Wall Sections

Soil Loss or Settling Along Shoreline

What Causes Seawall Erosion in Florida?

Florida’s coastal environment creates the perfect conditions for seawall washout. Constant wave action, tides, and groundwater pressure gradually remove soil from behind the wall, weakening its foundation.

Here are the most common causes of seawall erosion that homeowners should watch for:

Tidal Pressure and Wave Action

Daily tidal changes and strong wave impact wash away backfill soil from behind the seawall. Over time, this pressure removes the support structure, creating voids and erosion pockets that compromise the wall’s strength and lead to instability along Florida’s shoreline.

Soil Washout During Storms or Flooding

Florida’s tropical storms and heavy rainfall quickly saturate sandy soil, making it prone to washout. When water seeps through joints or base cracks, it carries fine sediment out to sea, creating sinkholes or soil voids behind the seawall.

Aging or Damaged Construction Materials

Older seawalls made with porous or poorly reinforced concrete deteriorate faster in Florida’s humid, saltwater conditions. As the materials weaken, small fractures allow water infiltration, which erodes the backfill and gradually undermines the wall’s stability and alignment.

Saltwater Corrosion and Material Breakdown

Saltwater exposure corrodes metal tiebacks and weakens concrete integrity. As the structure deteriorates, water penetrates deeper, accelerating soil loss behind the wall. In Florida’s humid, salt-rich climate, corrosion is a leading cause of long-term seawall washout and failure.

Our Proven Seawall Erosion Repair Solution

Every seawall erosion problem starts beneath the surface — when soil washes out or pressure builds behind the wall. At LUX Foundation Solutions, we use Polyurethane Grout Injection, a non-invasive, long-lasting repair method designed for Florida’s coastal environments to stop soil loss and restore seawall strength.

Technician injecting polyurethane grout to stabilize soil and repair seawall erosion behind waterfront property in Palatka, FL.

Polyurethane Grout Injection

After heavy rain, I’ve noticed sinkholes forming behind my seawall — is this erosion fixable without replacing the entire wall?

Yes. LUX uses expanding polyurethane grout to fill underground voids and seal water paths behind the seawall. This advanced process strengthens weakened soil, stabilizes the structure, and prevents recurring washout. The result is a durable, watertight barrier that stops further seawall erosion and protects your waterfront from Florida’s tidal pressure and coastal flooding.

View more Concrete Repair Solutions

Schedule Your Free Seawall Erosion Estimate Today

Don’t wait until erosion behind your seawall causes property damage or shoreline collapse.

LUX Foundation Solutions offers free, no-obligation seawall assessments to identify erosion problems early and provide permanent seawall erosion repair using polyurethane grout injection — a clean, fast, and proven method to stabilize soil and protect your waterfront.

Serving Jacksonville, St. Augustine, Palm Coast, Gainesville, Ocala, and coastal communities across Northern Florida, our team specializes in long-lasting seawall erosion control that restores

strength, prevents flooding, and protects your property’s value.

Call 904-921-3589 to schedule your free seawall assessment now.

Request a free Estimate

Seawall Erosion FAQs

How to stop seawall erosion in Jacksonville, FL?

In Jacksonville’s coastal neighborhoods, seawall erosion often starts with small voids or soil washout behind the wall. LUX Foundation Solutions stops the damage using polyurethane grout injection, a long-lasting, non-invasive repair that fills gaps, seals leaks, and stabilizes the soil.

This process restores your seawall’s support and prevents further erosion caused by tides, storms, or groundwater pressure — protecting your property and waterfront investment.

Which areas of Florida are most at risk for coastal erosion?

Coastal cities like Palm Coast, St. Augustine, and Jacksonville are especially vulnerable to seawall washout due to rising sea levels, tidal surges, and sandy soils that easily wash out. Homes near canals, rivers, or open bays face higher erosion risks year-round.

Experts at LUX specialize in seawall erosion control designed specifically for Florida’s coastal conditions — preventing washout, sinkholes, and property loss before they become costly issues.

How do seawalls cause erosion in St. Augustine, FL?

When improperly designed or aged, seawalls can reflect wave energy downward, scouring the soil in front of or behind the wall. In St. Augustine’s tidal zones, this often leads to erosion behind the seawall and uneven settling.

LUX Foundation Solutions prevents this by sealing leaks, strengthening the soil with polyurethane grout, and restoring proper drainage — ensuring your seawall absorbs, rather than redirects, wave impact over time.

How much does it cost to repair seawall erosion in Jacksonville, FL?

The cost to repair seawall erosion in Jacksonville and surrounding areas varies depending on the extent of soil loss and wall condition. Most homeowners save significantly with polyurethane grout injection, which is faster and more affordable than full seawall replacement.

LUX Foundation Solutions offers free estimates. We also offer flexible financing options, ensuring every Florida homeowner can access reliable, lasting seawall erosion repair without budget strain.

What should I do if I notice erosion behind my seawall in Palm Coast, FL?

If you see soil loss, sinkholes, or water pooling behind your seawall in Palm Coast, act immediately. These are early signs of void formation and structural weakening.

Experts at LUX perform detailed assessments to identify the erosion source, then use polyurethane grout injection to compact the soil and seal leaks. This stops washout, prevents collapse, and strengthens your seawall to withstand Florida’s seasonal rains and tidal pressure.