So your considering a Cumaru Deck or Ipe Deck on your next decking project. You should be proud of yourself, you have navigated the harsh world of hardwoods and come out with what is really the top 2 woods in the hardwood world. Let’s point out that Cumaru is a good wood and it has many similar characteristics to Ipe. Cumaru is better for decking than all other woods, except Ipe.
Ipe is more durable, lasts longer, is heavier, stronger, has more modulus of elasticity, more modulus of rupture, and is plain old harder. Really when it comes to decking characteristics Cumaru does not beat Ipe in any category. Here are some facts by the numbers, as well as a color comparison. Ipe usually starts a deeper brown but will turn a grey if you choose to not maintain it. This is becoming more and more preferred in the high end market as the grey popular.
Really the only reason to select Cumaru over Ipe would be to save money or if you are looking for a lighter color. But if your already spending the money for Cumaru why would you not spend a little bit more and get Ipe? If you wanted to save money you could have bought Cedar or another cheap hardwood. Once again though if you take into consideration how long the wood lasts Ipe is less expensive on a cost per year basis for overall ownership. Not to mention what you will save in maintenance.