6770 Buford Highway NE
Atlanta, GA 30340
Benefits of Cumaru Decking
Cumaru decking, also known as Brazilian Teak, has a number of qualities that make it stand out as the superior outdoor construction material.
- All Natural– Unlike composite decking, which is a combination of wood pulp and plastic, a non-recyclable material that pollutes our planet and pressure treated or reclaimed lumber that is loaded with toxic chemicals known to harm surrounding plant and animal life, Cumaru is 100% natural. It is ideal for repurposing, bio-degradable and does not create any biproducts that can harm the environment. No chemicals or plastics whatsoever, just 100% real wood. That’s why we say, “Go Natural!”
- Hardness– Cumaru is one of the hardest woods in the world with a Janka Hardness rating of 3,540, only 2% less than that of Ipe. Compare that to Oak, at about 1,200. This extreme hardness lends to its dimensional stability, long lifespan, and natural weatherproof properties. Pressure treated wood is known for substantial expansion and contraction with seasonal changes. This process destroys the cell structures from the center of the boards, outwards. It also increases the rate of decay. This movement is also responsible for creating raised wood grain that can be painful to walk on without shoes. Raised grain is a common problem with pressure treated woods but does not occur with tropical hardwoods like Cumaru. Composite and plastic decking will also expand and contract significantly over time which compromises the rigidity. This eventually leads to boards drooping between the joists. Cumaru, being so hard, will expand and contract some, but very little. Minimal movement is one key element to Cumaru’s incredible longevity.
- Longevity- Cumaru is renowned for its ability to last many decades even in extreme weather conditions. Density and hardness, as discussed above, plays a large role in that. Natural resistance to water penetration and rot/decay also contributes to its longevity. The forests, from which they evolved, experience 100-400 inches of rain per year. That is up to 8-10 times more than anywhere in the United States. Evolutionary responses to this heavy rainfall have made this wood naturally resistant to water penetration, mold, rot and decay.
- Board Replacement- Many people fail to consider how board replacement can be a HUGE obstacle with alternative deck materials like PT or composite. Let’s say you drop the hot contents of a grill on your deck and it damages the boards beyond repair. Unfortunately, if you don’t have a Cumaru or tropical hardwood deck, you’re in for a rude awakening. When you replace a PT or Composite deck board, it will stand out from the others, dramatically. These materials are all very consistent and continue fading over time. So, the new boards will ALWAYS stand out from the others. You are left with a deck that has very obvious patchwork. Tropical hardwoods vary from board to board, so replacing boards is no big deal. They may stand out from the others for a couple of months, but before long no one will be able to tell the new boards from the original ones. This benefit is specific to real, natural woods. Board replacement is also a common problem with prefinished and engineered wood flooring.
- Insect Resistance- Cumaru and other tropical hardwoods, are naturally insect resistant. Domestic lumber is treated with chemicals to deter wood boring insects. Cumaru evolved in forests with insects much more proficient at wood-boring than their North American counterparts. Very few insects in their natural habitat are capable of infiltrating their tough wood fibers and certainly, the domestic insects of the United States are no match. This is true for most tropical hardwoods.
- Fire Resistance- For many states in southwestern United States, fires are a large factor driving construction material decision making. This also holds true for large commercial projects in urban areas. Cumaru is very resistant to flame spread. Cumaru typically achieves high B ratings in Flame Spread rating tests. This usually means that prolonged exposure to flames may cause damage, but flame spread is minimal, at best. Plastic, composite and pressure treated lumber typically receive the lowest flame spread ratings C Class. Ipe and Cumaru are very similar, but Ipe typically outperforms Cumaru in this metric. Watch Matt Risinger’s YouTube video demonstrating Ipe’s incredible resistance to fire.
- Forest Stewardship- Cumaru is sourced from the tropical forests of South America, Brazil in particular. Concerns with harvesting Cumaru from the “lungs of our planet” are well warranted. The truth is, Brazil’s hardwood timber industry may be the forests best protection from clear-cut uses like Cattle and Agriculture. When Cumaru is harvested and regrown in its natural habitat, that habitat is protected by both the organization that replanted and the local or federal government. Without responsible forestry management, forest lands are more likely to be cleared for grazing cattle and planting crops. Each purchase of Cumaru, or other tropical hardwood, from conscientious hardwood dealers like Brazilian Wood Depot contributes to the value of naturally forested lands.
- Cost- Contrary to popular belief, Brazilian Hardwoods are not more expensive than the alternatives. The opposite, in fact. Pressure treated lumber is considered to last about 5-7 years before boards begin to deteriorate and rot. Plastic and composite boards will typically begin to fade and deteriorate within a few years. A composite deck is unattractive and nearly unusable after about 8 years. Alternatively, Cumaru is known to last from 25-75 years, depending on the environmental conditions. When you consider the cost of replacing pressure treated or composite boards through the life of just one installation of Cumaru, Cumaru is far, far more cost effective. The front-end cost of Cumaru decking is generally the same as the low-end composites and outperforms them in every measurable metric. Pressure treated lumber is cheaper than Cumaru, but you’ll replace the PT boards 5 times in the life of one Cumaru deck. So, is Cumaru the most cost-effective decking? Yes, usually in the short-term, but always in the long-term.
Cumaru Decking V.S. Other Decking
|REALCumaruTM||CCA-TREATED PINE||COMPOSITE DECKING|
|Movement in Service||Low||High||High|
|Fire Rating Class||High||Varies||Low|
For a more comprehensive comparison of decking materials, visit: Composite Decking vs. RealWood
How does Ipe decking compare to Composite decking? Visit our Composite Comparison page.
Compare Ipe Decking to Plastic/Composite Decking
(Being that Cumaru is very similar to Ipe, the following article comparing Ipe to composite materials is a very good reflection of how Cumaru compares to composite material.)
Ipe is one of the hardest, commercially available, woods in the world. With a Janka hardness rating of 3680, Ipe can withstand the most extreme elements and commercial wear and tear. Currently, there are no decking options that compare to Ipe’s many benefits. Plastic Decking is one alternative, but it has many downsides…
To start with the obvious, Trex and other Plastic or Composite Decking alternatives offer no natural features. Plastic or Composite options are either all grey or all beige or somewhere in between. All the boards will be exactly the same color with the exact same printed grains. Ipe Decking and other Brazilian Hardwood Decking offer only real, natural wood colors with real, natural grains. This means a beautiful variation of boards with each a unique grain pattern on every deck. The next downside to Plastic or Composite Decks is their inability to be repaired. If a board(s) gets damaged, scratched, stained or broken, the damaged piece cannot be fixed because Plastic and Composite Decking fades with time and exposure to the elements. If you were to replace one board on a Plastic Deck or Composite Deck, it would stick out, very obviously, from the other boards. The new boards would be the ‘manufactured’ color, while the others would be faded. This disparity will never even out. Moreover, Plastic and Composite Decking cannot be pressure washed or sanded to restore color. You are never really able to bring a Plastic or Composite Deck back to its original condition without replacing all of the boards.
Ipe Decks, on the other hand, can easily be brought back to their original condition. Keeping with the scenario outlined above, if a board on an Ipe Deck is damaged and needs to be replaced, all you would need to do is get a replacement board to put in its place. Because the color of Ipe varies from board to board, it would not stand out from the other boards at all. It’s natural variability in color lends to its advantage if a board ever needs to be replaced. Alternatively, if the board was scratched or stained, one merely needs to sand the surface of the stained board(s) and reapply the UV oil to bring them back to their original condition. Ipe Decks last forever not only because of their resilience to rot and decay, but also because the boards CAN be repaired, a quality not found in any other decking material. Another aspect that many people fail to consider before installing a deck is Heat Dispersion and Flammability. Wood is the best decking material for disbursing heat making the deck cooler to walk on and Ipe also has a similar fire rating to concrete. Basically, it’s a naturally non-combustible material. Plastic and composite decking is very hot and can create a fire hazard if installed outside a UV reflecting window.
Finally, the last major downfall of Plastic and Composite decks, sagging and drooping. The chemical combinations for Plastic and Composite decking options have changed over the years in an attempt to avoid problems like, insects, mold, and rot. Unfortunately, one problem that has yet to be tackled by even the most advanced Plastic or Composite Decks is sagging and drooping. Sagging and drooping refers to the pendulous deformation of deck boards between the joists. As far as longevity goes, this is the main problem for Plastic and Composite Decks. After several years, the chemical components in the decks breakdown which compromises the rigidity of the boards. It can compromise the strength in such a dramatic manner that the boards themselves loose their ‘straightness’ and droop between the joists. This is an extremely well-known problem for Plastic and Composite decks that has never been successfully addressed. Ipe Decking is 100% natural. There are no non-organic chemicals to breakdown. Ipe’s high density and hardness that lends to its’ incredible dimensional stability is why Ipe decks outperform Plastic and Composite decks in regard to longevity, 10 to 1. These are just a few reasons that Ipe Decks are the preferred choice over Plastic and Composite Decks. All considered, there really is no comparison between an Ipe Deck and a Plastic or Composite Deck.
Contact us with any questions on comparisons of Ipe and composite decking.
Typically, the board colors become more consistent with more time left in the sun without UV protection. The ‘greying’ process will not affect the structural integrity, lifespan, or water resistance of the boards. Let’s say, when the deck was originally installed, you didn’t apply the oil because you wanted the deck to turn grey. You can bring Cumaru back to its original condition. It may require a cleaning before oiling, just follow directions in the video, above.
Second, you do want your deck to hold its natural color. First off, you’ll want to use a UV Oil. It is not a “stain” nor a “sealer”. These terms are not technically accurate because UV Oil is not meant to provide a color change like “stain” or water protection like a “sealer.” Cumaru and similar tropical hardwoods have natural colors and they are naturally resistant to water penetration, so stains and sealers are not only unnecessary- they are improper.
If you are planning to maintain the natural color, we recommend using Messmers Ipe Hardwood Deck Stain. There are other products that also work to protect the natural colors of Cumaru and tropical hardwoods, but this is the product we have been recommending for +10 years. It comes in three colors, but the preferred color is “Natural.” The finish protects the wood well and contains transparent iron oxide pigment. This pigment absorbs UV radiation yet at the same time will allow visible light to pass through it. The staining results you’ll get are a finish that highlights the natural beauty of the Cumaru wood and at the same time protects it. Your deck will not fade in the sun as this product has excellent resistance to UV degradation. Maintaining the color of your deck typically involves annual oiling followed by periodic cleaning every 2-3 years. For more information on how to maintain the color of your Cumaru deck see the video above, Ipe Deck Maintenance
Choosing to finish your deck or leave it unfinished is a personal choice and you can’t go wrong either way. Brazilian Wood Depot is here to help you decide whether or not to stain your Cumaru deck. We will be happy to discuss your options.
Working with Cumaru
Storage and Handling
For out-of-state (outside of GA) installation, it is required that the materials acclimate to the climate conditions of the job site before installation; allow materials to acclimate to the job-site climate for ten (10) days prior to installation. Utilizing spacers or stickers between boards to allow air movement and natural drying also aids the acclimation process. Always store materials flat and keep dry and covered prior to installation. Installing wet or saturated boards may result in shrinkage. Refer to the Installation Requirements document for more information.
When designing your deck, you must provide for adequate ventilation to assure long term stability and avoid cupping. Proper air ventilation allows air to flow in from outside the deck area and under the joists to evaporate moisture. Gently sloping the soil under the deck away from the house and covering the soil with plastic is recommended for any type of deck installation. Allow a 1/8″ gap between standard deck boards for drainage and airflow. More detailed instructions can be found on the Installation Tab and the Installation Requirements documents. There are a number of different fastening methods; Face Screws, Kerf and Clips, Grabber Bars, Camo, or ProPlug. For a more detailed description of these fasteners visit the Accessories Tab.
Brazilian Wood Depot is the sole U.S. distributor of RealWoodTM – lumber which has passed rigid testing standards to be of the highest grade, and other important industry standards and benchmarks. To see more about the assurances of wood grading, milling and origin that the Real Wood™ brand provides, please go to RealWoodDepot.com. Any other provider of Real Wood™, including Real Cumaru™, Real Jatoba™, Real Tigerwood™, Real Garapa™, Real Massaranduba™, and RealIpe™ has been supplied by Brazilian Wood Depot.
At Brazilian Wood Depot, we also place an emphasis on the proper shipment of our lumber, to ensure that your Cumaru decking material arrives in the quality and excellent condition you deserve, preventing costly setbacks, stresses and inconveniences. With special wood crates for shipping and transportation, low overhead costs and large number of shipments, we can pass on great savings to you, while ensuring a smooth delivery process. We deliver Cumaru across the entire United States.
Ultimately, with RealCumaru for your home, you’ll be receiving a beautiful, hassle-free and long-lasting choice that will make your deck the envy of the neighborhood, but also simply a wise investment.
Call 770-242-0045 for any other information or for specific pricing on Cumaru.
Brazilian Wood Depot carries a variety of profiles. The standard decking profile for Cumaru and other tropical hardwoods is “1×6” (3/4” x 5.5”). 1×6 is appropriate for Joist spacing of 12” or 16”. Typically joist spacing greater than 16” is not allowed by code, but there are exceptions. For joist spacing greater that 16” OC, consider using “5/4 x 6” (1” x 5.5”). The additional board thickness contributes to the overall span strength of the decking. Brazilian Wood Depot always stocks both 1×6 and 5/4 x 6 Cumaru decking. For projects that require extra attention to water runoff or moisture equalization, see RainAway Decking and Deck Tiles.
Brazilian Wood Depot also carries a number of different profiles to accent different features of your deck like stair risers, balusters, railing sections, handrails, facia, posts, etc… These profiles are generally only offered in Ipe. Ipe dimensional lumber accents Cumaru decking perfectly and is the preferred choice for the deck features mentioned above. Refer to the Profiles and Dimensions document for profile availabilities.
Ipe: Deforestation, Sustainability and Illegal Logging
(The following article speaks on Tropical Hardwoods, in general, which also includes Cumaru)
You may be familiar with Ipe as the “King of Woods.” A species with almost unbelievable characteristics- natural resistance to rot, insect attack, and mold with density and hardness comparable to concrete. These features give Ipe and other tropical hardwoods the ability to outlast pretty much everything while providing unrivaled beauty and character. All of this is true. Ipe has been a staple in the decking, flooring, siding and furniture industries for many years for these reasons. Furthermore, in recent years, the prices of tropical hardwoods like Ipe, Cumaru, Purpleheart, Tigerwood, Massaranduba and Garapa will beat out even the mid-tier composite decking and siding alternatives. If that were the end of the story, these tropical hardwoods would be the market leaders for outdoor construction, hands down. Unfortunately, some narratives paint a darker picture of Ipe that is both misleading and endangers our native tropical forests…
What is the best deck finish for hardwoods?
Should I pressure wash my deck before finishing it?
NO. Pressure washing it will leave streaks, potentially tear up the surface of the wood and will not clean as deeply as the cleaner.
Where does Brazilian Wood Depot Ship?
We ship to all areas of the US.
For additional FAQ’s visit our FAQ’s Tab.
Quotes and Samples
Brazilian Wood Depot is here to help! We pride ourselves on superior customer support and turning around samples, quotes, and orders faster than anyone else. Please call us for samples or quotes, 770-242-0045.
Generally, all we need to get started on pricing your deck is the answer to a few, basic questions. We can help you answer these questions too:
- What species? With Six incredible Brazilian Hardwood species, deciding on just one can be a difficult task. I’d recommend familiarizing yourself with the different options on the Decking Tab or this Video.
- How will you fasten the boards? Whether you are using face screws, hidden clips, grabber bars, or the Camo system, we’ve got you covered. The decision is yours to make and your installer can also help guide this decision based on their preferences. Visit the Accessories Tab for more information on fastening methods.
- What are the basic dimensions of the deck and the joist spacing? Obviously, we’ll need to know the size of the deck to get things started. Joist spacing information allows us to quote accurate fastening quantities.
- Additional Deck Features? You don’t need to know all the intricate details of your deck design to get a basic quote, but if you do have the information it can help make the quote more accurate. Additional features would include; steps, risers, posts, railing sections, handrail, and facia.
This is all we need to get started pricing your new deck. Again, we’re here to help you make the best decisions for your deck. You can reach us anytime at, 770-242-0045.
Shipping and Delivery
Photos and Videos
Visit our Gallery for photos and deck design ideas.
UPDATED Ipe Deck Maintenance (FULL Cleaning and Oiling)
Ultimate Guide to Ipe Siding! (AND 3 Other BHW Alternatives; Cumaru, Massaranduba AND Tigerwood)
How to Fasten Ipe Decking (or any Brazilian Hardwood Decking)
Problems with Ipe Decking- Is Ipe Too Hard?
Problems with Ipe Decking; Cupping
The Sun's Effect on Brazilian Hardwoods; All Six Species
Why GO NATURAL! with Brazilian Wood Depot?
Ipe Siding (Cumaru, Tigerwood, Garapa, Purpleheart, Massaranduba)
The Best Decking Material