Protect your waterfront property

Seawalls must withstand some of the most brutal conditions of any marine structures built today. Cracking, bowing, or erosion of the ground behind the wall can be signs of trouble. Heavy loads due to high levels of ground water, violent storms, and marine borers are just a few of the hazards to consider when choosing which contractor and material to use to protect your waterfront property. Several of the most commonly used seawall materials that can protect your most valuable investment are available through Duncan Seawall and are described below.

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Concrete Seawalls

Duncan Seawall is the area’s leader in installing the most durable concrete pre-cast seawalls. Our concrete sheet panels are manufactured off-site by a professional concrete fabricator with on-staff engineers to ensure that each panel is constructed using the highest level of quality concrete consistency. The panels are 8” thick, include 5,000 P.S.I. concrete and continuous steel rebar throughout, and are properly cured for approximately six weeks. These specifications provide the strength and stability needed in a superior concrete panel seawall. 

After installing the concrete panels, Duncan Seawall supports the seawall with a steel reinforced, 5,000 P.S.I 20"x22" concrete cap and tieback system. Each tieback rod consists of a ¾” diameter hot dipped galvanized threaded rod with a 6” x 6” plate bolted to each end, securing the cap to an independent concrete base buried in the yard. Steel rods are not heated or bent in the field due to the reduction of structural integrity induced in the tieback rod.


This finished concrete cap is long lasting, aesthetically pleasing, and an added value to your waterfront property.



Long lasting, interlocking system that creates
an extremely strong continuous wall
Primarily used when the exposed wall height is large


Wood walls are commonly used on freshwater properties
that do not require the strength or corrosive resistance
Wood is also commonly used for retaining walls that are not constructed in water


Composite creates fiber reinforced polymer profiles of extraordinary strength An alternative solution to concrete, steel, aluminum, or vinyl and are
available in a variety of colors


Vinyl panels can be installed using little or no heavy equipment Vinyl is an excellent choice when there are tight conditions or limited
access to the seawall