Cumaru is a South American wood that has a beautiful yellow-brown color and a fine interlocking grain pattern.
Cumaru lumber is often confused with Teak, and it is sometimes referred to as Brazilian Teak. In actuality Cumaru a very different wood and comes from the other side of the world. It does have much of the same weather resistance that makes Teak famous, and Cumaru does have some of Teak’s golden hue.
Despite these similarities, in its most common use, Cumaru decking is actually more of an alternative to Ipe or Massaranduba than to Teak, because of its extreme hardness and weather resistance.
Cumaru Decking Properties
Cumaru wood dries evenly and is only slightly prone to checking if dried properly. It is a dense species with an interlocking grain, but it planes and machines quite well.
It is a stable species, but we have found that it is best to use it in a thicker cut for ideal results. Therefore, J. Gibson McIlvain only carries 5/4 thickness for Cumaru decking. We stock both 4 and 6 inch wide deck boards that are surfaced and eased on 4 sides. We can also groove your Cumaru decking for use with hidden deck fasteners.
Cumaru is also an oily wood and often has a waxy texture. This high oil content makes Cumaru decking very resistant to the elements. Although the oil can occasionally cause problems with finishing or gluing, an easy pretreatment can strip away this oil and prepare the wood nicely for the finishing and gluing processes.
As a decking wood, Cumaru excels with high hardness, great strength, and reliable stability. Cumaru is not the cheapest decking product, but it is also not the most expensive. As such, it makes a great alternative to Ipe decking, while still pleasing discerning customers who fear confronting the potential stability issues that plague the cheapest of tropical decking options.