Since wood is weaker when installed horizontally versus vertically, a horizontal fence is prone to sagging. You can prevent this drooping from happening by building a sturdier fence. Use softwoods that are more stable, such as cedar and redwood, or denser hardwoods for your fence materials. If you can’t afford these pricey materials, use thicker two-by-six pressure-treated pine boards or shorten the span the fence boards have to cover by installing more posts.

A fence post set in concrete lasts anywhere from five to over 25 years, depending on how well the concrete was applied and the fence post’s material. Untreated wood posts in concrete could last less than 10 years, but a durable, treated wood set in properly applied concrete could last a few decades. However, all fence posts will wear out eventually, so expect to need to replace your fence post every five to 15 years.

To choose where to add a fence gate, know where fence gates shouldn’t go. For example, you should avoid placing gates over low spots on the ground where water can collect and form muddy puddles. Many ranchers install gates at the corner of a fence. Certain gate placements may also be required depending on the type of gate latch you use.

The lifespan of wire fencing heavily depends on factors like gauge, material, coating type, and environmental conditions. However, with proper maintenance, many wire fences last for 20 to 30 years. Coastal areas or regions with high rainfall may see reduced lifespans of 10 to 15 years due to increased corrosion risk.