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Cumaru Decking Resource Guide

Cumaru Decking 1×6

Cumaru Decking 5/4×6

Cumaru Decking 1×4

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Why Purchase Cumaru Decking from BWD?

Cumaru Decking is recognized as one of the toughest and most reliable natural hardwoods available, offering exceptional strength, long-term durability, and decades of proven outdoor performance. This page serves as a complete resource for understanding Cumaru, with links to real project photos, weathering examples, installation guidance, and side-by-side comparisons against pressure-treated pine and composite materials.

For a deeper species overview, explore the dedicated Cumaru Decking Page and browse real installations in the Cumaru Decking Photo Gallery.

Color, Appearance and Weathering Behavior

Cumaru (Dipteryx odorata) is known for its warm reds, rich browns, and golden honey tones, often showing striking natural variation from board to board. Its grain tends to be interlocked and textured, which adds visual interest and improves natural slip resistance.

Left unoiled, Cumaru gradually shifts toward a soft medium-brown patina as UV exposure blends the initial color diversity. Those who prefer the fresh, warm tones can easily maintain them with periodic oiling using the Messmer’s Certified Cleaning & Oiling Guide.

To visualize these changes, browse examples in the Hardwood Weathering Video.

Installation, Fasteners and Best Practices

Like Ipe, Cumaru is a high-density hardwood that performs best when installed with rigorous fastening methods, correct spacing, and proper airflow. Our full collection of installation guides provides step-by-step, multimedia support for every major system:

For an overview of all fastener options, visit the Deck Fasteners Page.

Understanding Board Sizes, Layouts and Length Choices

Many homeowners ask which board size is best for Brazilian hardwoods. While Cumaru is compatible with all standard profiles, the same sizing principles that apply to Ipe also benefit Cumaru performance. These companion articles provide clear guidance:

These resources explain why 1×6 boards typically offer better stability, flatter performance, and lower waste, and how random-length bundles help reduce cost while improving layout flexibility.

Weathering, Movement and the Cumaru Advisory

To ensure customers have the most accurate expectations, Brazilian Wood Depot has published a transparent review of modern Cumaru supply and performance. Over the past several years, Cumaru entering the U.S. has shown:

  • More movement in heavy sunlight

  • Higher risk of warping under hidden fasteners

  • Reduced consistency compared to historical supply

Full details can be found in the Cumaru Advisory.

For best results, we strongly recommend:

  • Avoiding heavy, prolonged direct sunlight

  • Using surface-mounted stainless-steel screws rather than hidden systems

  • Maximizing airflow beneath and around the deck structure

To understand airflow design and cupping prevention, explore Cupping Explained.

Maintenance, Cleaning and Color Care

Cumaru’s durability does not decline as the surface color fades. With proper care, including washing, brightening, and periodic oiling, Cumaru can maintain its warm tones for many years. The following tools show exactly how to do this:

Project-Specific Tools and Planning Resources

If you’re unsure which species or fastener will work best in your environment, these interactive tools provide personalized recommendations:

The Decking Wizard includes seven scenario-based reports covering everything from low-airflow decks to fully covered porches, offering installation-ready recommendations tailored to your jobsite conditions.

Shipping, Transparency and Customer Support

Your Cumaru order benefits from the same industry-leading shipping program that supports every BWD hardwood delivery. Learn how we crate, protect and track your materials through:

For a full look at why builders nationwide trust BWD, explore Why Choose Us.

Final Note

Every resource on this page, from the Cumaru Decking Gallery to the fastener guides, board-size articles, and the Cumaru Advisory, is designed to help you make informed decisions, avoid preventable problems and build a Cumaru deck that performs beautifully for the long term.

Info-circled Info-circled Installation, Finishing, Comparisons, Weathering, Videos, Galleries & More

Custom Shipping Solutions + A Damage Free Guarantee

Your project schedule matters, and we make delivery simple. Most Ipe decking orders ship nationwide within about three business days, prepared by our expert in-house team in Atlanta, GA. And BWD has the MOST ROBUST SHIPPING process IN THE INDUSTRY and the only Damage Free Guarantee:

  • 🚀 Unmatched Speed: Most orders leave our warehouse within three business days, keeping projects on schedule from the start.
  • 📦 Exclusive Custom Crating: Every order is fully enclosed in reinforced, custom-built crates — a protection standard no other supplier in the industry matches.
  • 📡 Live GPS Tracking: Each shipment includes a 4G GPS tracker, allowing you to monitor your order in real time from departure to delivery.
  • 💯 Proven Damage-Free Record: With zero material damage in over three years, our shipping process leads the industry in reliability and care.

Explore our Shipping Page for a full overview, watch our Shipping & Crating Video to see the process step-by-step, and view Recent Orders for real examples of our transparency in action.

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