For years, boat builders have prized teak’s unparalleled durability, workability and resistance to extreme weather conditions. Teak is unaffected by insects, fungus and acids making it ideal for decks and other outdoor architectural projects.
Due to the natural preservative oils in teak (tectona grandis) it is virtually maintenance free.  Oil finishes may be used to emphasize the rich beautiful colour of teak or if you wish, you can let it naturally weather to a warm silver-gray patina