Cumaru vs. Ipe: A Side-by-Side Comparison for Deck Builders

Cumaru: The Practical Alternative to Ipe

Cumaru (Dipteryx odorata), commonly marketed as Brazilian Teak, has emerged as the leading alternative to Ipe for exterior hardwood applications. While it doesn't quite match Ipe's legendary hardness, Cumaru delivers exceptional performance at a price point that's typically 20–35% lower.

Head-to-Head Comparison

| Property | Ipe | Cumaru | |---|---|---| | Janka Hardness | 3,680 lbf | 3,330 lbf | | Density | 62–72 lb/ft³ | 58–68 lb/ft³ | | Bending Strength (MOR) | 25,400 psi | 22,800 psi | | Fire Rating | Class A | Class A | | Expected Lifespan | 40–75 years | 30–50 years | | Typical Cost/LF (5/4x6) | $4.50–$7.00 | $3.00–$5.00 |

Color and Appearance

Freshly milled Cumaru displays a warm, honey-to-reddish-brown color with attractive grain patterns that many homeowners prefer over Ipe's darker olive-brown tones. Like all tropical hardwoods, both species will weather to a silver-gray patina if left unfinished — a look that many coastal and contemporary projects embrace.

Working Properties

Cumaru is slightly easier to work than Ipe due to its marginally lower density, but the difference is modest. All the same rules apply: pre-drill every hole, use carbide-tipped bits, and specify stainless steel or approved coated fasteners. Cumaru does have higher silica content than Ipe, which can accelerate blade dulling during ripping and crosscutting.

When to Recommend Each

Choose Ipe when: The project demands maximum lifespan, the client prioritizes the darkest natural color, the installation faces extreme exposure (marine, commercial boardwalks), or fire rating requirements are critical.

Choose Cumaru when: Budget is a factor but the client still wants genuine tropical hardwood performance, the warmer color palette is preferred, or the project is residential with moderate exposure.

The Verdict

Both species deliver outstanding exterior performance that far exceeds domestic softwoods and composite alternatives. The choice often comes down to budget and color preference rather than meaningful performance differences for most residential applications.