Premium hardwood · American black walnut
Walnut wood
Walnut wood (Juglans nigra) is an American hardwood with a deep chocolate-brown colour and premium grain, harvested from the eastern United States. It carries a density of **610–660 kg/m³ and Janka hardness of 4,490 N**, used for executive furniture, conference tables, and premium accents. Stocked at 25, 38, and 50 mm thicknesses in NHLA FAS grade.
What is black walnut wood?
Black walnut wood (Juglans nigra) is an American hardwood harvested from black-walnut trees in Ohio, Kentucky, Tennessee, and Missouri. It features a chocolate-brown to deep purplish-brown colour, a distinctive wavy grain, density of 610–660 kg/m³, and Janka hardness of 4,490 N.
Black walnut is unique among American hardwoods for its naturally dark colour without staining. The hue derives from juglone, a natural compound in the tree. With age, the wood lightens slightly toward golden brown — a property called mellowing that is prized in premium furniture.
Riyadh Timber imports black walnut from the eastern United States in NHLA FAS grade, **kiln-dried to 7–9% moisture content** for executive furniture. Standard thicknesses are 25, 38, and 50 mm with lengths of 2.4–3.6 m and widths of 15–25 cm. Each shipment carries NHLA FAS and FSC certification.
Why is black walnut used in executive furniture?
Black walnut is the premier American furniture hardwood for four reasons: its dark natural colour eliminates staining, its wavy grain creates a unique visual signature on every board, its hardness (4,490 N) is sufficient for furniture while its workability allows fine carving, and its aesthetic value elevates the space. It is used in royal majlis tables and executive desks.
Each walnut board is unique in grain pattern — no two boards are identical. This makes it the favoured species for art-grade pieces and bespoke furniture treated as visual art. Premium Italian and American makers reserve black walnut for signature pieces requiring a visual statement.
Per the American Hardwood Export Council (AHEC), **black walnut prices rose 40% between 2020 and 2024** driven by Chinese and Gulf demand for premium furniture. Saudi demand concentrates on FAS grade in 38 and 50 mm for majlis tables and executive desk tops in palaces and towers.
What are the technical specifications of black walnut?
Black walnut is stocked at 25, 38, and 50 mm thicknesses, lengths 2.4–3.6 m, widths 15–25 cm. Density 610–660 kg/m³, Janka hardness 4,490 N, moisture 7–9% kiln dried. Each batch is NHLA FAS grade with FSC certification.
| Product name | American black walnut |
|---|---|
| Botanical name | Juglans nigra |
| Country of origin | United States (Eastern) |
| Density (kg/m³) | 610 – 660 |
| Janka hardness | 4,490 N |
| Moisture content | 7 – 9% (kiln dried) |
| Thicknesses (mm) | 25 · 38 · 50 |
| Lengths (m) | 2.4 – 3.6 |
| Widths (cm) | 15 – 25 |
| Colour | Chocolate brown to deep purplish brown |
| Grade | NHLA FAS |
| Indicative price | SAR 6,500 – 12,500 / m³ |
What are the applications of black walnut wood?
Black walnut serves conference tables (38–50 mm), executive desks (25–38 mm), premium palace accents (25 mm), American classical furniture (25–38 mm), and piano and instrument components (25 mm). Its naturally dark colour eliminates the need for stain.
- 01
Conference tables (38–50 mm)
Boardroom tables in Kingdom, Al Faisaliah, and KAFD towers. A single board can reach 4–6 m, delivering an imposing seamless appearance.
- 02
Executive desks (25–38 mm)
Desktops for senior executives. Walnut is laminated to MDF or secondary hardwood substrate with an oil finish that highlights the grain.
- 03
Premium palace accents (25 mm)
Upper shelves, carved frames, wall-decoration work. The 25 mm thickness suits architectural overlay in palaces.
- 04
American classical furniture (25–38 mm)
Bookcases, console tables, classical dining tables in Chippendale and Colonial styles. Walnut is the historical species of American furniture.
- 05
Piano and instrument components (25 mm)
Grand piano cabinets and classical guitar bodies. Sound propagates in walnut at 4.2 km/s, producing a distinctive resonance.
What is the difference between walnut wood and oak wood?
Walnut surpasses oak in luxury and natural dark colour, but oak is harder (5,990 vs 4,490 N), denser, and 30–40% cheaper. Walnut is chosen for visible signature pieces (executive tables, art panels); oak is chosen for floors, doors, and daily structural use.
Choose walnut when visual distinction and artistic value matter more than hardness — conference tables, art-grade furniture panels. Choose oak when hardness and durability dominate — premium flooring and executive doors. Premium palaces typically combine both: oak floors with walnut furniture.
| Attribute | Walnut | Oak |
|---|---|---|
| Botanical name | Juglans nigra | Quercus alba |
| Janka hardness | 4,490 N | 5,990 N |
| Density | 610–660 kg/m³ | 720–770 kg/m³ |
| Natural colour | Dark chocolate | Golden brown |
| Stain required | No — natural tone preferred | Optional |
| Price | SAR 6,500–12,500/m³ | SAR 4,200–8,500/m³ |
| Best application | Signature executive furniture | Flooring & doors |
How do I choose the right black walnut grade?
Black walnut comes in two grades: FAS (highest) for visible parts and Select for hidden components. FAS guarantees 83.3% of the board face is clear of defects, with a 183 cm minimum length. For executive tables choose FAS exclusively; for internal frames choose Select.
For a single conference-table board, choose FAS at 38 or 50 mm thickness, 20–25 cm width, 2.4–3.6 m length. A 2.5 × 1 m table requires 4–5 boards at 25 cm width. Order 15% extra to cover cuts and calibration.
Walnut sapwood (the lighter outer ring) appears in every board at 5–10% by area. FAS grade allows up to 5% sapwood. For fully matched visible parts, request **FAS Premium 100% Heartwood** at a 10–15% surcharge.
How is black walnut stored and installed in Riyadh?
Black walnut stores in a conditioned space at 20–22 °C and 45–55% RH with a 14–21 day acclimatisation period before installation. Furniture uses mortise-and-tenon or Domino joinery glued with PVA D3. Finishing uses natural oils to deepen the dark colour.
Walnut is sensitive to humidity changes, expanding 0.7% per 4% RH change. Premium Riyadh joinery shops maintain 22 °C and 50% RH year-round to handle walnut. Storing in an unconditioned space for a month is enough to compromise the batch.
Walnut finishing uses 3–4 coats of natural oil (tung or Danish) or high-clarity water-based polyurethane lacquer. Avoid chemical stains as they hide the wavy grain. Natural oil deepens the colour and accentuates the wavy grain pattern.
Does black walnut meet NHLA and Saudi standards?
Riyadh Timber's black walnut carries NHLA FAS American certification and FSC sustainability certification. Each shipment ships with a US mill origin certificate and lot number for Chain of Custody traceability. It meets SBC 1001 indoor-air-quality requirements at E1 emission level.
The United States is the sole commercial source for black walnut, producing 95% of global output. NHLA FAS certification guarantees grading per the National Hardwood Lumber Association standards in force since 1898. The certificate is recognised globally and accepted on Saudi government projects.
For LEED- or Mostadam-certified projects, we provide full Chain of Custody from the American forest to the Riyadh site. Black walnut earns 2 points under Mostadam as a renewable material from sustainably managed forests.
Which Saudi projects use black walnut?
Black walnut appears in majlis tables in royal palaces, boardroom tables in Kingdom and Al Faisaliah towers, executive desktops for senior officials, and premium furniture in presidential suites at top hotels. It is the favoured species for signature executive pieces in Riyadh.
- Royal and princely palaces — diwan majlis tables and primary princely desktops.
- Riyadh financial towers (Kingdom, Al Faisaliah, KAFD) — boardroom tables and executive meeting rooms.
- Luxury hotels (Al Faisaliah, Ritz-Carlton, Four Seasons) — desktops in presidential suites and select fine-dining tables.
- Major banks and financial institutions — executive desks and board-level meeting rooms.
- Premium joinery shops in Riyadh and Jeddah — raw stock for bespoke palace and villa furniture.
What are common questions about black walnut?
Minimum is **1 cubic metre** for site delivery given the high unit price. For large workshops and palace projects the minimum rises to 3–5 m³ with 7–12% volume discount. Smaller quantities are picked up from the Riyadh yard.
Black walnut is not held in continuous stock; advance orders carry a **4–6 week lead time** from the US port. For thick stock (50 mm) and long lengths (above 3.6 m), the lead time extends to 8 weeks.
Walnut undergoes **mellowing — a natural lightening over 5–10 years** during which it loses some colour density and shifts toward golden brown. The phenomenon is natural and prized in classical furniture. Natural oils slow but do not stop it.
Yes, walnut is among the best hand-carving woods thanks to its **medium density (610–660 kg/m³)** and uniform grain. It accepts fine detail without splintering and is historically used in premium sculpture and art-grade pieces.
Walnut boards rarely exceed **3.6 m** because of the American tree's natural form. For 3.6–4.2 m lengths we provide Premium-grade boards at a 20–30% premium with 8–12 week lead time.
American black walnut (Juglans nigra) is denser, darker, and harder than **European walnut (Juglans regia)**, which is light brown. American is 4,490 N, European 3,400 N. American is the standard for premium executive furniture; European is mostly used in decorative veneers.
Yes, our workshop applies **natural oil finishes (tung or Danish oil)** in 3 coats at SAR 200–350/m² depending on complexity. Finishing accentuates the wavy grain and deepens walnut's natural colour.
What products relate to Walnut wood?
Selections that complement the work in Saudi construction projects.
Need a black walnut quote for your project?
Send the cubic-metre quantities, thicknesses, and grade (FAS or Premium). We respond with a formal quote within 4 working hours — unit price, total, lead time, and NHLA FAS and FSC certificates included.