IPE

Ipe is a beautiful exotic wood from South America. Ipe wood structures are hard, strong, and naturally resistant to rot, abrasion, weather, and insects. It is almost twice as dense as most woods and up to five times harder. It is medium to darker brown in color, like a mahogany, so not only lasts a long time but has the beauty of a fine interior wood. 

Ipe Wood Lumber is used for decking and other outdoor applications like furniture, siding, and fencing. Its has a extremely long life in the outdoors. It can last up to 75 years and will last more than 40 years  in almost all applications. That is 4-7 times as long as most pressure treated woods. If you want to build something to last for a long time, Ipe is an excellent choice.