IPE

Ipe (pronounced ee-pay) is one of the densest hardwoods available for outdoor construction.  It is very dense (in fact it sinks in water), it has the same fire rating as concrete and steel, and it is mildew and decay resistant.  Its denseness and natural oils make it virtually impenetrable to insects (so insect deterioration is not an issue).  Ipe does not scratch or splinter easily, it does not become hot in the sun, and has a high friction coefficient, making it perfect for outdoor and seaside construction.