Cumaru Wood Guide 2026
Dipteryx odorata
Typically described as extremely hard durable decking wood
Wood Appearance
Natural Grain
Finished Surface
Key Takeaways
- Density: 69 lbs/ft³
- Classification: Hardwood
- Origin: Brazil;Peru
- Common uses include Decking, Heavy exterior use, Boardwalks
Quick Facts
Representative reference values — natural wood varies by growing region, moisture content and individual board.
Durability, Stability & Workability
Texture: Medium
Workability: Very hard; interlocked grain can tear out. Pre-drill and use stainless fasteners.
Fastening: Pre-drilling recommended for screws and nails.
Finishing: Penetrating oils recommended; allow acclimation before install.
Color change: Reddish-tan darkens with oil; grays without finish.
Insect resistance: Resistant to termites
Ratings and published values are representative reference figures. Natural wood varies with growing region, moisture content and individual boards — treat them as guidance, not guarantees.
Common Sizes & Availability
Typical market availability for Cumaru. Lumberama is a sourcing marketplace — actual stock, widths and lengths vary by supplier. Request a quote to confirm what's available for your project.
| Thickness | Rough | Typical surfaced | Typical widths | Common lengths | |
|---|---|---|---|---|---|
| 4/4 | 1" | 13/16" (3/4" common) | Decking 4 in. and 6 in.; lumber random widths | Decking 8–20 ft even lengths | Request this size |
| 5/4 | 1-1/4" | 1-1/16" | Decking 4 in. and 6 in.; lumber random widths | Decking 8–20 ft even lengths | Request this size |
| 8/4 | 2" | 1-3/4" | Decking 4 in. and 6 in.; lumber random widths | Decking 8–20 ft even lengths | Request this size |
- 4/4rough 1"
- Surfaced
- 13/16" (3/4" common)
- Widths
- Decking 4 in. and 6 in.; lumber random widths
- Lengths
- Decking 8–20 ft even lengths
- 5/4rough 1-1/4"
- Surfaced
- 1-1/16"
- Widths
- Decking 4 in. and 6 in.; lumber random widths
- Lengths
- Decking 8–20 ft even lengths
- 8/4rough 2"
- Surfaced
- 1-3/4"
- Widths
- Decking 4 in. and 6 in.; lumber random widths
- Lengths
- Decking 8–20 ft even lengths
Decking & exterior profiles
1x4, 1x6, 5/4x4, 5/4x6; 2x4, 2x6, 4x4
Availability notes: Commonly stocked as a lower-cost Ipe alternative. Acclimate on site; more movement than Ipe.
How lumber sizes are described
- Rough (4/4, 8/4…)
- Hardwood thickness in quarters of an inch as sawn, before surfacing. 4/4 = 1" rough.
- Surfaced (S2S/S4S)
- Thickness after planing. 4/4 typically finishes at 13/16" or 3/4".
- Nominal vs. actual
- Construction lumber is sold by nominal size; a 2x6 measures about 1-1/2" x 5-1/2".
- Random width / length
- Most hardwood is sold as it comes from the log — widths and lengths vary within a range rather than being fixed.
Color & Grain
Color: Yellowish to reddish brown
Grain: Straight to interlocked; coarse texture
Common Uses
- Decking
- Heavy exterior use
- Boardwalks
- Flooring
Key Characteristics
Also known as: Brazilian Teak;Tonka
Availability: In Stock
Advantages
- Janka indentation hardness: 3,540 lbf
- Heartwood decay rating: Very Durable
- Sourced from Brazil;Peru
- Excellent density for wear resistance
Considerations
- Pre-drilling recommended for fasteners
- Hardness does not establish decay resistance or structural design strength
- Availability may vary
Frequently Asked Questions
Alternatives to Consider
Species commonly specified for similar applications when Cumaru is unavailable or over budget.
Related Species
Compare This Wood
Explore More on Lumberama
Popular Applications
Calculators & Tools
Related Blog Posts
Heat Pump Guide: Types, Cost & How They Work
Heat and cool your home efficiently with one system.
Read articleAir Conditioning Guide: Types, Cost & Efficiency
Stay cool and save money on cooling.
Read articleWater Heater Guide: Types, Cost & Replacement
Choose the best water heater for your home.
Read article