
Cumaru Boardwalk Lumber
Best-value boardwalk hardwood — Brazilian Teak delivers 90% of Ipe's performance at 30-40% less cost. Increasingly specified by parks departments and municipalities for public boardwalk projects.
Janka Hardness
3,330 lbf
Boardwalk Lifespan
50+ years
Fire Rating
Class A
ADA Slip Resistance
Compliant
Why Choose Cumaru for Boardwalks
Cumaru boardwalk lumber is the smart specification for municipalities and developers who want premium hardwood boardwalk performance without the premium Ipe price. Brazilian Teak at 3,330 Janka delivers structural performance virtually indistinguishable from Ipe for boardwalk applications — handling millions of footsteps per year while costing 30-40% less per board foot. For large-scale boardwalk projects where material volume runs into thousands of linear feet, the savings fund other project priorities.
Cumaru boardwalks are increasingly specified by parks and recreation departments as the budget-conscious alternative to Ipe. The wood provides the same critical advantages that make tropical hardwood superior to pressure-treated pine for public infrastructure: ADA-compliant slip resistance, splinter-free surface for barefoot pedestrians, zero chemical leaching into wetlands and waterways, and Class A fire rating. A Cumaru boardwalk simplifies environmental permitting the same way Ipe does — no chemicals means no contamination risk.
At 65 lbs/ft³ density and Class 1 durability, Cumaru boardwalk decking lasts 50+ years under heavy public foot traffic. That's 3-4 times longer than pressure-treated pine, eliminating multiple costly replacement cycles. The warm reddish-brown to golden-tan tones create an inviting public walkway that weathers to silver-gray naturally. For boardwalk projects where the budget needs to stretch further without compromising on hardwood quality, Cumaru is the proven answer.
Also used for residential decking → Cumaru Decking
Also used for dock decking → Cumaru Dock Decking
Recommended Cumaru Boardwalk Sizes
5/4x6
Standard boardwalk boards for public paths, nature trails, and promenades.
Shop 5/4x62x6
Commercial and municipal boardwalks with heavy traffic and vehicle loads.
Shop 2x61x6
Lighter-duty nature trail and park path boardwalks.
Shop 1x65/4x4
Narrow walkways, garden paths, and connecting paths.
Shop 5/4x4Boardwalk Applications for Cumaru
Beach Boardwalks
Beachfront boardwalks, beach access paths, and coastal walks.
Nature Trails
Park and preserve nature trail boardwalks through wetlands and forests.
Promenades
Urban waterfront promenades, riverwalk paths, and downtown pedestrian walkways.
Resort Boardwalks
Hotel, resort, and golf course pathways and pool surrounds.
Park & Recreation
Public park paths, playground and rec area connections.
Wetland Crossings
Elevated boardwalks over marshes, swamps, and ecologically sensitive areas.
Cumaru Boardwalk Specifications
| Botanical Name | Dipteryx odorata |
| Common Names | Cumaru, Brazilian Teak, Tonka Bean |
| Janka Hardness | 3,330 lbf |
| Density | 65 lbs/ft³ |
| Durability Class | Class 1 |
| Fire Rating | Class A (ASTM E84) |
| Rot Resistance | Excellent |
| Insect Resistance | Excellent |
| ADA Slip Resistance | Meets requirements when maintained |
| Expected Boardwalk Lifespan | 50+ years |
| Color (Fresh) | Reddish-brown to golden-tan |
| Color (Weathered) | Silver-gray patina |
| Chemical Treatment Required | No |
| Recommended Sizes | 5/4x6, 2x6, 1x6, 5/4x4 |
| Origin | South America (Brazil, Peru, Colombia) |
Boardwalk Installation & Engineering Notes
Joist spacing: 16" OC for 5/4 boards, 12" OC for 2x and heavy commercial. Board direction perpendicular to travel. Leave 3/16" gaps. 316 SS fasteners for coastal, 304 for inland. Maintain ADA-compliant gaps (≤1/2"). Pre-drill all holes. Seal all cut ends. Acclimate 7-14 days. Helical piles for wetland crossings.
Cumaru Boardwalk vs. The Alternatives
| Feature | Cumaru | PT Pine | Composite | Concrete | Fiberglass |
|---|---|---|---|---|---|
| Boardwalk Lifespan | 50+ yrs | 10-15 yrs | 15-20 yrs | 30+ yrs | 25-30 yrs |
| Lifecycle Cost (50 yr) | Lowest | Highest (3-4 replacements) | High (2-3) | Moderate | Moderate |
| ADA Slip Resistance | Excellent | Poor when worn | Moderate | Moderate | Good |
| Splinter-Free | Yes | No — worsens | Yes | N/A | Yes |
| Barefoot Safety | Excellent | Poor | Hot in sun | Rough | Rough |
| Chemical Leaching | None | Yes — CCA/ACQ | Microplastics | Alkaline | None |
| Environmental Permitting | Easiest | Complex | Moderate | Complex | Moderate |
| Aesthetics | Premium natural | Basic | Uniform plastic | Industrial | Industrial |
Cumaru Boardwalk vs Pressure-Treated Boardwalk
PT boardwalks last 10-15 years, splinter, leach chemicals, and become slippery. Cumaru lasts 50+ years, is splinter-free, chemical-free, and slip-resistant. Over 50 years, Cumaru saves municipalities the cost of 2-3 complete boardwalk replacements.
Cumaru Boardwalk vs Ipe Boardwalk
Ipe is slightly harder (3,684 vs 3,330 Janka) with a longer public infrastructure track record. Cumaru costs 30-40% less with comparable boardwalk performance. For parks departments watching budgets, Cumaru delivers the same public-facing quality at a better price.
Learn moreCumaru Boardwalk vs Composite Boardwalk
Composite gets dangerously hot, sags under traffic, sheds microplastics, and lasts 15-20 years. Cumaru stays moderate temperature, handles any load, is chemical-free, and lasts 50+ years — at a comparable installed cost.
Cumaru Boardwalk FAQ
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About Cumaru Wood
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