A seawall is a barrier that is constructed to prevent water from eroding the front of property that sits on a body of water, such as a lake. Typically, a seawall is installed during fall or winter as some lakes that are water-controlled have their water level lowered. Seawalls are can be constructed of materials such as stone or concrete. However, you can also build a seawall using water-resistant wood boards.
Things You'll Need
- Post hole digger
- Metal posts with threaded studs
- 2-by-12 cedar boards
- Power drill
- Socket wrench
Determine where you want to build the seawall along the edge of the water. Place stakes in the ground where the seawall will be located. Tie a string onto each stake to indicate the position of the seawall.
Dig a hole for the metal posts with the post hole digger to a depth of 24 to 36 inches. Repeat this step to dig a hole every 5 to 6 feet along the length of the wall.
Insert a metal post with threaded studs into each hole. Mix concrete in wheelbarrow by following the instructions on the package. Fill the hole with the concrete using a shovel. Allow 24 to 48 hours for the concrete to dry.
Place a level on top of each post to ensure that each post is sitting level to the ground.
Measure each 2-by-12 board and make a mark where the mounting holes need to be located using the pencil. Drill mounting holes into the wood with the power drill.
Place the 2-by-12 boards over the threaded studs on the metal posts. Place a washer over the threaded stud and then hand tighten a nut. Tighten the nut on the stud with the socket wrench. Repeat this step to install the remaining wood boards for the seawall.
Place a layer of rocks or gravel at the bottom front of the wall to prevent erosion. Add gravel or rock as a back fill behind the seawall and then add topsoil.
Tips & Warnings
- If the edge of the lake is tough dirt or gravel, you can dig a hole using a jackhammer.
Seawalls are a type of coastal defense built on the shoreline to reduce the damage from waves and storms. They are also...
How to Build a Bulkhead
A bulkhead is used in a concrete footer where there are steps up or down. These bulkheads allow a change in concrete...
How to Install a Steel Sea Wall
You cannot install a steel sea wall by yourself. It requires at least a three-member team, and one of you must have...
How to Build a Seawall
A seawall can prevent loss of your waterfront property to erosion. Building a seawall takes a lot of physical labor, but it's...
- How to Build Wooden Cars
How to Repair a Wooden Seawall
A seawall is a barrier that prevents beach erosion by acting as a line of defense by holding back water. Because it...
Types of Bulkheads & Seawalls
Bulkheads and seawalls are man-made structures designed to protect bluffs and land banks by separating water and land. Bulkheads serve as retaining...