The answer to 'how often to fence' is that the frequency of fence maintenance and replacement depends on several factors, including the type of fence, the climate, and the level of use. On average, most fences need to be inspected and maintained every 1-2 years, and may need to be replaced every 10-15 years.
Wooden fences typically require more frequent maintenance, such as staining or sealing every 2-3 years, and may need to be replaced every 10-12 years. Vinyl and aluminum fences are more durable and may only need to be inspected and cleaned every 1-2 years, with replacement needed every 15-20 years. Chain link fences are the most low-maintenance, often only needing a quick inspection and cleaning every 1-2 years, with replacement required every 15-20 years.