CASE STUDYPelican Isle Yacht Club – Naples, FL

The Problem: Erosion, Voids & Structural Instability

The marina’s seawall exhibited several critical issues:

💠 Sinkholes forming behind wall panels created unstable ground sections
💠 Four large 24-inch stormwater outfall pipes were leaking, resulting in severe soil erosion and water infiltration
💠 Settling access pavers became uneven and hazardous

Contributing factors included:

💠 Saltwater corrosion gradually weakening concrete integrity
💠 Ongoing tidal shifts and wave action displacing underlying soil
💠 The infrastructure—likely 35–50 years old—lacked modern drainage and erosion protection systems
💠 No proactive maintenance or drainage measures had been implemented

Together, these risks demanded a durable solution that preserved marina aesthetics and prevented a full-scale replacement.

What We Found During Inspection

A detailed site assessment revealed:

💠 Void zones behind panel joints threatening structural stability
💠 Significant soil loss around pipe outflows, increasing sinkhole risk
💠 Separated panel joints, compromising the seawall’s ability to support loads safely and retain soil effectively

Our Repair Process

Seawall Savers™ carefully designed and executed a four-step, minimally disruptive solution:

💠 Site Preparation
Removed pavers and worked closely with marine engineers to identify safe injection zones.

💠 Polyurethane Grouting
Delivered approximately 750 gallons of SWRP1 hydrophobic polyurethane resin, which expands upon injection to form a watertight, rigid foam barrier.

💠 Permeation Grouting
Conducted 65 deep injections up to 8 feet beneath the seawall joints. This stabilized the soil mass behind the wall without the need for digging or heavy mechanical disturbance.

💠 Floating Containment Barriers
Utilized floating curtains to contain grout near boats and sensitive docking areas—ensuring a clean and protected operation.

Project Results

💠 Structural Stability Restored: Voids eliminated and soil movement halted
💠 Zero Heavy Equipment Required: Non-invasive delivery preserved marina operations and surroundings
💠 Cost Savings: We avoided an estimated $100,000+ seawall replacement scenario
💠 Improved Safety: Re-leveled access pavers eliminated slip and trip hazards
💠 Rapid Completion: The marina was operational within days instead of weeks or months

Why Polyurethane Grouting is a Smart Solution for Waterfront Properties

Florida’s coastal homes and marinas face unique threats—from aging seawalls to increased storm activity. Proactive, modern techniques like those used at Pelican Isle Yacht Club offer significant advantages:

💠 Avoid full seawall replacement and its cost (often 50–70% savings)
💠 Prevent trip hazards or liability incidents caused by shifting surfaces
💠 Maintain property value and seamless aesthetics during repairs
💠 Fortify seawalls against king tides, hurricanes, and rising water levels

Maintenance Tips for Marina & Coastal Property Owners

💠 Schedule annual inspections—especially before and after storm season
💠 Monitor for visible cracks, panel movement, or seepage
💠 Ensure outfall pipes and drainage systems remain clear
💠 Address small erosion signs early to prevent large-scale failure