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Doju 5/4x4 S4S E4E Deck BoardView full size
Ghent Wood Products

Doju 5/4x4 S4S E4E Deck Board

Nominal 1-1/4 × 4·Net 1" × 3-1/2"·S4S Eased Edge·KD
Free freight to NY, New England, NJ & PA on hardwood decking orders over $5,000. Once you qualify, the rest of your order ships free too.

Doju 5/4x4 deck board — S4S Eased Edge, kiln-dried. A dense, stable tropical hardwood and an affordable Ipe alternative. Priced by length.

5/4x4 S4S covers 3.5″ per lineal foot · 0.417 BF per lineal foot.

Price per board
LengthBoard$/LF$/MBF
8'$35.84$4.48$10,752
10'$44.80$4.48$10,752
12'$59.16$4.93$11,832
14'$65.80$4.70$11,280
16'$85.92$5.37$12,888
18'$92.70$5.15$12,360
20'$103.00$5.15$12,360

Format count/length per length, separated by spaces — e.g. . Available lengths: 8′, 10′, 12′, 14′, 16′, 18′ and 20′.

Want to see it first? Order a 1-ft sample — $4.48.

Need help with a takeoff? Request a quoteand we'll build the tally for you.

  • In stock
    Ready to ship or pick up, no waiting on a mill.
  • Your exact tally
    Pick the count for every length. Send us your plans and we’ll build the tally for you.
  • Free freight over $5,000
    On hardwood decking to NY, New England, NJ & PA. Once you qualify, the rest of your order ships free too.
  • White-glove delivery
    Within 100 miles of Ghent, guaranteed: our own truck, unloaded by Moffett forklift or by hand. 100–400 miles: hotshot trucks from carriers we’ve used for years. No tractor-trailer in your driveway.
  • Talk to a real person
    Lumber people, not a call center. (518) 828-5684Mon–Fri 7:00–4:30 · Sat 8:00–12:00
  • Come see it first
    Visit our yard at 1262 Rte. 66, Ghent, NY, or pick up your order there.
  • 80 years in business
    Family-owned since 1946, now in its 4th generation, in Columbia County, NY.
Jason Meltz of Ghent Wood Products (right) with Andrew Jackson of Old Mill Carpentry at a Doju hardwood decking project

Jason Meltz (right) with Andrew Jackson of Old Mill Carpentry on a Doju hardwood decking project.

“Ghent’s edge is deep technical product knowledge and a true partnership with both suppliers and customers. We deliver the highest-quality specialty lumber, timbers, flooring, siding, and custom millwork at the most competitive prices—and we’ll help guide you from design to delivery.”
Jason Meltz, Owner
Size: 5/4x4

Doju is a close cousin to Ipe — denser-hitting on the hardness scale at 3,680 lbf, and one of the most stable hardwoods used outdoors, which makes it a sound choice close to the ground and in climates that swing. It has been traded in Europe for decades under its own name rather than as a substitute for anything else. The practical difference from Ipe is supply. Doju carries no CITES Appendix II listing, and the resource sits concentrated in a smaller region under long-standing supply arrangements, so availability is steadier and the paperwork simpler. Left alone it ages to a silver-grey; oiled, it keeps the olive-brown and yellowish-grey contrast it starts with. Those stability figures — radial shrinkage of 3.6% and tangential of 5.1% — come from Nova’s own laboratory testing in August 2025 of the specific Doju sub-species they supply, which runs tighter than the generic published numbers for the species.

Color
Doju heartwood is light to dark olive brown, with contrasting yellowish-grey or grey-brown tones running through it. Left untreated it weathers to a lustrous silver-grey; oiled or stained it holds a rich golden-brown.
Grain
Straight to very irregular
Texture
Medium to coarse
Durability
Rated as very durable. Resistant to brown- and white-rot fungi, with exemplary weathering characteristics.
Common uses
Decking, siding, fencing, boardwalks and heavy exterior construction.
Origin
Found in marsh forests, ridge tops and riverbanks through the Lesser Antilles and continental tropical America, with supply concentrated in the northeast corner of South America.
Botanical family
Buchenavia
Also known as
Buchenavia spp, Bolivian Walnut

Strength & performance

Compare all decking species →

Mechanical properties, benchmarked against Ipe — the tropical-hardwood gold standard.

Janka hardness3,680 lbf100% of Ipe
Resistance to denting, wear and foot traffic
Bending strength (MOR)22,480 psi89% of Ipe
Load a board carries before it breaks
Stiffness (MOE)2,240 ksi71% of Ipe
Resistance to deflection — less bounce underfoot
Density950 kg/m³90% of Ipe
Weight — a proxy for durability and stability
Full Doju species profile →

Specifications

Material
Doju
Brand
Ghent Wood Products
SKU
DOJU-54X4-S4S
Pattern
S4S Eased Edge
Nominal size
1-1/4 × 4
Net size (actual)
1" × 3-1/2"
Condition
Kiln-dried (KD)
Sold by
LF
Weight
1.44 lb
Availability
In stock

Reviews

★★★★★5.0· 6 reviews
★★★★★

Red balau

Great product I’ve done 3 decks with this and one tongue and groove ceiling it’s a beautiful product
Eric O., SwiftElk · Cairo, NY
★★★★★

I Love my Golden Balau deck

I was a little unsure which product I wanted to use on my new deck. But Jason and the team at Ghent helped guide me in the right direction. My deck turned out so beautiful and the clips used to install it allowed us to not have any screws showing. I am so happy with our decision. The best part is it requires little maintenance. This was as important to us along with being beautiful. I am so happy I shopped local and got an amazing product I can enjoy for years to come.
Laurie P. · HOLLOWVILLE, NY
★★★★★

Ghent Wood Everywhere

The crew at Ghent wood products assisted us from start to finish on building our dream home. From the designing stages to completion, They were there to answer questions, give competitive pricing , and deliver premium materials. We wouldn't go anywhere else!
Mat & Shelby N. · Ravena, NY
★★★★★

Happiness is a Red Balau Deck

Jason and his team were super helpful with advice on how to install my deck using the QuickClip hidden fasteners. We did have to screw and plug most of the end joints to keep the boards straight.
Steve G. · Portland, OR
★★★★★
We installed and finished our 2x12 and 2x6 Batu dock trim boards last October using ExoShield Walnut. After seven months, the material still looks perfect. Wow! This stuff really does last. All my previous experience has been with Penofin's Hardwood Formula. This finish blows it away. Thank you!
Stephen · Mercer Island, WA · Batu Dock
★★★★★
We've used a number of products here in Florida where the sun beats down on our deck and have never found a successful product. We decided to try using your Black Walnut ExoShield and it's performed much better than anything else we've tried. Tung Oil is the magic and your product is the magic! In addition, we stained our entire Cedar porch ceiling with Black Walnut ExoShield and then applied a coat of marine Spar Varnish over the ExoShield. We couldn't be happier with the results and everyone who comes over compliments us on the beauty of our porch ceiling.
Michelle · Daytona Beach, FL · Cedar Ceiling
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