6 Signs It's Time To Construct A Seawall

Posted on: 9 June 2022

Seawall construction is a notably involved process even when a project protects a limited area. Folks generally don't want to engage in retaining seawall installation work unless they have to. If you're seeing any of the following issues, it's probably time to get started on a retaining seawall.


Even in regions where the general geological trend is toward the land emerging from the ocean, erosion can be problematic. Water is nothing if not persistent, especially when wave action is driving it.

Erosion can threaten structures, habitats, and scenery. It often ends up being a threat to land values, especially if it ends up preventing home construction at the location. Building a retaining wall to keep out the water now could prevent larger engineering problems down the road.

Flooding Tides

As the water rises and falls with tides, it can leave behind some unpleasant surprises. Water can pool in areas inland. In the best-case scenarios, this might leave behind seaweed and smelly decaying remains. In the worst scenarios, it could damage property by undermining foundations, exposing underground utility pipes and lines, and washing away paved surfaces.

Even if the receding water drains and evaporates quickly, it may also leave debris behind. At best, this is an annoyance. However, the water can deposit large rocks, pieces of wood and metal from the ocean, or even an entire object like a boat.

Insect Infestations

Damp soil can encourage insects to start occupying the ground. Even if you don't see pooling water, there may be enough moisture in the ground to encourage the process. Retaining wall construction in the area can create a barrier that reduces how much the soil will absorb moisture.


Similarly, the moist soil can also encourage locally heightened humidity levels. If you walk out on the deck, especially after the tides have come through, you might find the humidity oppressive. Retaining seawall construction can reduce the moisture levels and ultimately curb some of the humidity.


Water isn't the only thing that moves as the ocean comes and goes. When soil and water mix, the flow can be unpredictable. You may see sand and soil disappear, leaving behind voids. These may be small depressions, or they can be quite pronounced.

Water Lines

If the water keeps coming up to a certain level, it will leave behind stains. These water lines will give you a good idea of the typical level, but they only hint at potential peak levels. Especially if you're not at the property all the time, watch for where water lines might appear.

For more information about seawall construction, contact a seawall contractor such as Lindley Landscape.