The Modern Alternative to Seawall Replacement
866-398-9323Licensed seawall specialists — FL · GA · SC
Seawall Repairs by Solid Foundations provides professional Polyurethane Injection Seawall Stabilization for waterfront homeowners and commercial waterfront properties across Florida, Georgia, and South Carolina. Licensed CBC1267322, NCFI-certified, 30+ years experience. Most repairs completed in 1–2 days. Call 866-398-9323 for a free inspection.
Polyurethane injection is the most advanced non-invasive seawall repair technology available — and Seawall Repairs by Solid Foundations is an NCFI-certified top installer. Our polyurethane injection system fills voids behind the seawall panel, seals cracks and joints, stabilizes shifting soil, and restores structural integrity — all without excavation, without removing your dock, and usually in a single day.
For a plain-language walkthrough of how injection works on a real wall, read our polyurethane injection seawall guide.
Polyurethane foam injection for seawall repair involves pumping a two-component expanding polyurethane resin through small-diameter injection ports drilled through the seawall panel. The two components react on contact, expanding up to 25 times their liquid volume to fill every void in the soil cavity behind the panel. Once cured — typically within 15–30 minutes — the foam becomes a rigid, closed-cell, waterproof mass that permanently fills the void and re-supports the seawall panel. As an NCFI-certified contractor, we use marine-grade polyurethane formulations specifically engineered for subaqueous and coastal applications.
We probe the seawall and surrounding soil to identify the location, depth, and extent of all voids before drilling any injection ports.
Small-diameter injection ports (5/8" diameter) are drilled through the panel at strategic locations — typically every 3–5 feet — covering the full extent of the void area.
Our NCFI-certified two-component polyurethane is injected through each port using calibrated equipment. The foam expands through the void network, filling all cavities.
We monitor back-pressure at each port to confirm the void is fully filled before moving to the next injection point.
All injection ports are plugged with marine-grade stainless plugs and sealed to match the panel surface as closely as possible.
We re-probe all treated areas after the foam has cured to verify complete void fill and structural restoration.
Polyurethane injection costs $8–$25 per board foot of foam injected, plus mobilization and port drilling fees. A typical residential seawall void fill runs $3,000–$15,000 depending on void volume. Projects are priced after a free site assessment — we don't charge until we know exactly what's needed.
Polyurethane injection is often one part of a broader seawall reinforcement program, where void fill is paired with drains and tiebacks. It's also a common step in bulkhead repair when soil has washed out from behind the panels. If you're still deciding whether your wall can be saved, our guide on seawall repair vs. replacement walks through how that decision is made.
You'll find this method in use on canal and bay walls across our service area, including seawall repair in Tampa, Naples seawall repair, seawall repair in Fort Lauderdale, Jacksonville seawall repair and seawall repair in Charleston. To find out whether injection fits your wall, you can request a free void inspection.
Licensed, insured, NCFI-certified. Serving Florida, Georgia & South Carolina since 1996.
866-398-9323