Cedar and redwood are generally considered higher quality materials than pressure-treated wood. They contain natural tannins that make them resistant to rot, infection, and rot without additional chemical treatment. But they are soft and easily damaged, even when walking. The material can last for decades, but like all types of wood, in the sun, their natural color fades to a soft gray if not oiled a couple of times a year. Both cedar and redwood must be washed, sanded, and polished every three years.