Cumaru (pronounced Ku-mah-rue) also known as Brazilian Teak is one of the densest hardwoods available for outdoor construction, second only to ipe. It is very dense, which is why it is ideal for exterior use as it is mildew and decay resistant. It is often used for decking, flooring, railroad ties as well as other purposes. Just like ipe, cumaru has a A1 fire rating, 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
Species: Dipteryx odorata
Other Names: Almendrillo, Amburana, Brazilian Teak, Cumaru Rosa, Imburana de Cheiro, Tonka, Tonka Bean, Tonquin Bean cumaru decking for building, kumaru, Gaiac de Cayenne, Amendrillo, ebo, Shihuahuaco Amarillo, Charapilla, Sarrapia
Cumaru Origin: Central and South America (Brazil, Colombia,Peru, Bolivia, Costa Rica, Guyana, Honduras, Jamaica, Mexico, Panama, Venezuela)
Appearance: Cumaru hardwood is a deep reddish brown color with a tight, even grain. Over time the red cumaru color will slightly fade to a light brown. The species has an irregular, slightly interlocked grain and is coarse and wavy in texture.
Tree Size: 130-160 ft (40-50 m) tall, 3-5 ft (1-1.5 m) trunk diameter
Average Dried Weight: 68 lbs/ft3 (1,085 kg/m3)
Specific Gravity (Basic, 12% MC): .86, 1.09
Janka Hardness: 3,330 lbf (14,800 N)
Modulus of Rupture: 25,390 lbf/in2 (175.1 MPa)
Elastic Modulus: 3,237,000 lbf/in2 (22.33 GPa)
Crushing Strength: 13,850 lbf/in2 (95.5 MPa)
Shrinkage: Radial: 5.3%, Tangential: 7.7%, Volumetric: 12.6%, T/R Ratio: 1.5
Drying: Cumaru hardwood is very unstable when used in dry climates and it is prone to shrinkage. It is naturally seasoned, and kiln dried as to prevent shrinkage.
Workability: Cumaru decking is difficult to saw and bore and has a high blunting effect on tools. Cumaru cannot be glued because of its high density and oily nature. Instead it should be nails and screws should be used well after pre-boring the boards. The dust arising from working Cumaru wood flooring has been known to cause a slight allergic reaction on contact with skin for some people, and as such some care should be taken in installing and preparing this product.
Preservation: Cumaru hardwood naturally weathers to a beautiful, silver-gray patina. To maintain this rich tone, a deck oil with UV inhibitor or sealers are good options.
Sustainable: The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) does not list Cumaru in its appendices. The Forest Legality Initiative also states that cumaru can be exported and traded internationally. International Union for Conservation of Nature’s Red List of Threatened Species (IUCN) does not list cumaru as an endangered species. Brazilian Lumber, LLC meets high standards for social, economic and environmental responsibility. We monitor and document chain of custody of all our hardwood, we are Lacey Act compliant, IBAMA compliant and provide FSC certified options. This means that purchasing from us, fuels the hardwood lumber economy in South American forests, and by providing well paying jobs for many people in turn means the industry values its conservation and preservation.
Advantages of using cumaru for your outdoor projects?
- Strong and Durable
- Low Maintenance
- Natural Look
- Long Life Span
- Sustainably Sourced
- Boosts your Property Value
- Lower price-point than ipe
Would you like to talk to a hardwood decking specialist? We would love to help you call 954-404-8011