How long does a seawall last?

Hey guys, Jerry Wilson here—The Dockman, bringing you another essential breakdown on waterfront construction. If you own a waterfront property, you know how crucial a seawall is for protecting your land from erosion. But just how long can you expect a seawall to last? The answer depends on the materials, environment, and maintenance. Let’s dive in!

Seawall Lifespans by Material

Not all seawalls are built the same, and their longevity depends on what they’re made of. Here’s a rough estimate of how long different types of seawalls can last:

• Concrete Seawalls – 50+ years with proper care. These are some of the strongest options but can develop cracks over time. Regular sealing and inspections help extend their life.
• Steel Seawalls – 25–40 years, depending on how well they’re coated and maintained. While strong, steel is prone to rust, especially in saltwater environments.
• Vinyl Seawalls – 30–50 years and growing in popularity due to their resistance to rot, UV damage, and corrosion. A great low-maintenance option!
• Wooden Seawalls – 15–30 years, but they require consistent maintenance to prevent rot and pest damage. Pressure-treated wood can help extend lifespan.
• Riprap (Rock) Seawalls – 50+ years when properly installed. They don’t degrade like other materials, but occasional replenishment is needed to replace displaced rocks.

Maintenance is Key

No matter what type of seawall you have, regular inspections and upkeep are essential. Watch for signs like cracking, leaning, or erosion—these are red flags that your seawall needs attention. Addressing issues early can save you from costly repairs or full replacements down the road.

At the end of the day, a well-built and well-maintained seawall can last for decades. If you’re thinking about installing one or need repairs, you know who to call—The Dockman and the Water’s Edge crew. We’ve got the expertise to keep your shoreline strong for years to come!

Until next time, stay safe on the water! 🚤💪

— Jerry Wilson | The Dockman