Cumaru hardwood boardwalk through coastal preserve
Boardwalks & Promenades

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

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Boardwalk 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 NameDipteryx odorata
Common NamesCumaru, Brazilian Teak, Tonka Bean
Janka Hardness3,330 lbf
Density65 lbs/ft³
Durability ClassClass 1
Fire RatingClass A (ASTM E84)
Rot ResistanceExcellent
Insect ResistanceExcellent
ADA Slip ResistanceMeets requirements when maintained
Expected Boardwalk Lifespan50+ years
Color (Fresh)Reddish-brown to golden-tan
Color (Weathered)Silver-gray patina
Chemical Treatment RequiredNo
Recommended Sizes5/4x6, 2x6, 1x6, 5/4x4
OriginSouth 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

FeatureCumaruPT PineCompositeConcreteFiberglass
Boardwalk Lifespan50+ yrs10-15 yrs15-20 yrs30+ yrs25-30 yrs
Lifecycle Cost (50 yr)LowestHighest (3-4 replacements)High (2-3)ModerateModerate
ADA Slip ResistanceExcellentPoor when wornModerateModerateGood
Splinter-FreeYesNo — worsensYesN/AYes
Barefoot SafetyExcellentPoorHot in sunRoughRough
Chemical LeachingNoneYes — CCA/ACQMicroplasticsAlkalineNone
Environmental PermittingEasiestComplexModerateComplexModerate
AestheticsPremium naturalBasicUniform plasticIndustrialIndustrial

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.

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Cumaru 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

Excellent. At 3,330 Janka with Class 1 durability, Cumaru handles heavy public foot traffic for 50+ years. It's increasingly specified by parks departments as the best-value alternative to Ipe for municipal boardwalks.

For boardwalks, the performance difference is minimal. Both are ADA compliant, splinter-free, and chemical-free. Cumaru costs 30-40% less. Choose Ipe for maximum lifespan (75+ vs 50+) or when the specification requires the proven Ipe track record.

A Cumaru boardwalk lasts 50+ years under heavy public foot traffic — 3-4 times longer than pressure-treated pine. This eliminates multiple costly replacement cycles for municipalities.

Cumaru is the best-value premium hardwood boardwalk option — typically 30-40% less than Ipe while delivering comparable performance. For large boardwalk projects, the savings are substantial.

Yes. Like Ipe, Cumaru requires no chemical treatment — zero leaching into wetlands, marshes, or waterways. This simplifies environmental permitting for ecologically sensitive areas.

Yes. Cumaru's dense grain provides a smooth, splinter-free surface that remains safe for barefoot pedestrians for the entire 50+ year lifespan — critical for ADA compliance and public liability.

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