All wood needs to be treated for rot and insects. Redwood is the most durable but also the most expensive. Cypress and cedar, like redwood, naturally repel insects. Cypress tends to be expensive as it needs to be shipped long distances, while cedar is more readily available. As a result, most people choose cedar as the best wood for fencing. Well-graded pine, fur, or spruce are pressure treated with an insecticide and water repellent stain, but they lack durability when compared to other types.