Redwood can last up to about 30 years on a well-maintained deck under good circumstances. Redwood is the most fire resistant decking material on the market. Its use as building cladding is credited with limiting the Great Fire following the 1906 earthquake in San Francisco. Redwood has been historically the most popular deck material because of these properties. However, because of a limited supply and environmental concerns it is now less available and usually the most expensive option. Also Second Growth trees don’t perform nearly as well as the Old Growth trees that established Redwoods outstanding reputation because they do not possess as high of levels of decay resistance. Redwood decking material is widely available on the West Coast in various sizes and grades, but has very limited availability most everywhere else.