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A barbed wire fence will last an average of 15 to 20 years, but the life expectancy can range anywhere between five and 50 years. Thicker wires last longer, as do fences made with galvanized metal. If the barbed wire fence is in a climate with harsh winters and summers, it likely won’t last more than 10 to 15 years. Failing to keep up with maintenance and repairs will also shorten the lifespan of a barbed wire fence.

Do you need a permit to build a fence if you are simply replacing an existing fence? Whether you need a permit in this case depends on your local laws and regulations. Most municipalities consider a fence replacement project as being equal to building a new fence, so you likely will need a permit. Check with your local building inspection department or zoning department to see if you need a permit. If you hire a local fence contractor, this pro can take care of obtaining all permits for you.

On most untreated wood fences, there is no need to sand before treating. You typically only need to sand if there’s an old coat of paint or stain on your fence. If you do need to sand off a previous paint or protective coating (like an old stain or sealant), use medium-grit sandpaper.

The most durable metal for a fence is wrought iron. With proper care, a wrought iron fence can last for centuries. This means regular resealing to stave off rust and corrosion, especially in coastal climates with salty sea air. In these environments, chain link and corrugated fencing tend to stand up better to the elements with fewer maintenance needs.