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A fence gate can sag for several reasons. The issue often stems from the hardware, such as damaged or bent hinges, or loose screws that can no longer support the gate's weight. The gate frame itself might also have come out of square due to failing supports. Alternatively, the problem may not be the gate but the supporting fence post, which could be leaning or out of place. In many cases, fixing a sagging gate is as simple as tightening the hinge screws or upgrading to more robust hinges.

How long a fence lasts, including a split rail fence, will depend on the material from which it’s made. The average lifespan of a wood fence is about 15 to 20 years. However, split rail fences made out of premium materials, like composite, vinyl, steel, or aluminum, can last for 25 to 30 years or more, especially if you take good care of the material and carry out necessary maintenance.

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.

If you don’t have a pressure washer or simply don’t want to lug it out of storage, you can spot-clean your wood fence with a garden hose instead. Apply your mild detergent with a soft cloth, scrub with a broom or other soft-bristled brush, and rinse with a garden hose.