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The average lifespan of a wood fence is 15 to 20 years, but some can last for 40 years or more depending on several factors. The type of wood is crucial; for example, untreated pine may only last 5 to 10 years, while pressure-treated pine can last up to 20 years, and cedar's natural resistance can extend its life to 40 years. Other factors include local weather conditions, with wet and windy climates causing faster deterioration, and the quality of maintenance. Higher-end wood, metal posts, and privacy fence styles also tend to last longer.

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.

You can sometimes install a fence over a gas line. Fence installation typically requires a two-foot depth for posts, so if the lines are shallower than two feet, you cannot put a fence post over the line. You’ll need to call 811 to get the gas lines located and marked before you start the project.

A silt fence should be buried in a trench that is 6 to 12 inches deep. A depth of at least 6 to 8 inches is necessary to prevent water and sediment from running underneath the fence. A deeper trench, up to 12 inches, provides better anchoring during wet and windy weather. To ensure proper installation, look for a red line on the silt fence fabric, which often indicates the correct burial depth. Always adhere to local guidelines and regulations; a professional contractor will be familiar with these requirements.