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When considering how much of a gap should be under a fence or gate, a good rule of thumb is to keep gaps between 2 and 5 inches tall. This allows for some ground clearance for the gate but still provides safety for children and pets, who shouldn’t be able to squeeze through a gap of that size.

How long a fence should last depends on the type of fence, but a common split wooden fence should last seven to 10 years. Chain link can last much longer, with wrought iron and concrete lasting decades. If you're interested in your fence lasting as long as possible—and it's made of wood—consider sealing and treating the wood so it can stand up to the environment. Wood is the only fence type that requires this, as concrete and metal are almost always waterproof.

Aluminum is among the longest-lasting fencing materials, with a lifespan of 30 to 50 years or more. One of the reasons it lasts so long is because aluminum is highly resistant to rust and corrosion. You can help prolong its lifespan by keeping it free of vegetation and cleaning it every few months with a hose and mild soap.

The average lifespan of a vinyl fence is 20 to 30 years. But with regular maintenance and care, some vinyl fences can last up to 50 years. To keep your fence in good shape, we recommend cleaning it every few months with a soft-bristled brush and mild soap, regularly inspecting it for damage, and trimming nearby trees to reduce the chance of impact damage or mold growth.