Seawall Repair

Life on a shoreline can be wonderful, but it also brings issues. One of the most significant differences between owning a regular residential home and a waterfront property is the constant watch for shoreline erosion. Many property owners install a seawall to protect against erosion and damaging storm surges.

What Is a Seawall?

A seawall is a structure that protects the shoreline and surrounding property from erosion and flooding. There are two basic types of seawalls: riprap or stone embankments and vertical walls made of concrete, masonry, or other materials. A well-constructed seawall protects waterfront properties from floodwaters, storm surges, and wave erosion. 

Signs Your Seawall May Need Repairs

Your seawall must maintain its structural integrity to protect your property against erosion. It’s essential to inspect your seawall for the following problems on a regular basis:

  • Chipping or cracking along the top of the seawall cap
  • Large or widening gaps between seawall slabs
  • Slabs that are bowing, leaning or misaligned
  • Deteriorating slabs
  • Visible rust stains on the seawall
  • Small holes or voids next to the seawall
  • Soil erosion behind the seawall

Heavy rains, high tides, and storms can quickly turn a minor seawall issue into a significant problem. In addition to being a safety hazard, a damaged seawall detracts from your property value and results in parts of your yard or dock becoming unusable. The longer you put off repairs, the worse the damage will become. 

Seawall Repair Options

When it comes to repairing a seawall, there are three main options to consider:

Excavation and Replacement

Tearing out a damaged seawall (or a section of the wall) and replacing it is time-consuming and environmentally damaging. Replacing a seawall is the most expensive repair option as obtaining required permits, excavation, and new construction is labor intensive and requires heavy equipment.

Cement Grout

Many contractors and property owners attempt to fill sinkholes and plug seawall leaks with cement grout. This approach is time-consuming, labor intensive, and adds weight to an already stressed seawall. These types of repairs are rarely long-lasting.

Polyurethane Resin

Polyurethane seawall repair has several advantages over both excavation and cement grout repair methods. Polymer foam is used to push the water out, lifting and leveling sea walls to prevent the need for expensive replacements. Polymer foam can fill voids, stabilize loose soil, and seal leaks at a fraction of the cost of a complete seawall replacement. Polyurethane seawall repair requires minimal disruption, is rapidly installed, and is environmentally friendly. Repairs made with polyurethane resin are long-lasting and cost-effective.

Why Choose RT Construction for Seawall Repair?

RT Construction has partnered with the Alchemy-Spetec network to protect residential and commercial properties from loss and damage along the shoreline. We use polyurethane foams that react with moisture in the soil and expand to fill voids while they permeate the soil to form a solid, strong, watertight mass to repair seawalls. These polyurethane foams seal cracks and defects, as well as fill voids and stabilize soil. Most of our repairs can be completed in less than a day.

RT Construction has completed residential and commercial projects in Missouri, Illinois, and Kansas, all with the same high level of precision and quality. With over 25 years of experience, we take pride in our work, and your satisfaction is guaranteed. We are licensed, insured, and bonded for your protection.

If you live in the greater St. Louis metropolitan area or the Lake of the Ozarks, call us at 636-317-5636 to schedule an inspection and free estimate.


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