The life expectancy of a seawall is generally about 35 years on average. However, it can vary, depending on the following factors:
Type of seawall (steel, outcropping, rip rap)
Extent of maintenance
Quality of installation
Steel seawalls typically last around 35 years or so, but other types of seawalls are generally more durable because they are made of rock. When given due care and maintenance, they might even last a lifetime. The installation process is critical and improper installation can reduce the seawall’s lifetime by 10-15 years. A major reason for seawall failure is that they are not deep enough. A seawall should be as deep as it is high in order to support itself. Thus, you should be careful about the seawall service you choose (we reckon it’s Coast Seawall).