Ash
Ash is a mainstream furniture hardwood with open pores, strong grain definition, and exceptional shock resistance. Its ring-porous structure responds especially well to cerused, limed, and stained finishes that emphasize the natural pore pattern. SENTIENT uses ash for tables, seating, and casework where a clean, contemporary look with visible grain character is the goal.
Characteristics
Fraxinus americana (Oleaceae (olive family)), a Hardwood (angiosperm). Also known as White ash, ash.
Heartwood is light to medium brown, while the sapwood can be wide and ranges from beige to light brown, not always sharply demarcated from the heartwood. The grain is almost always straight and regular, with a medium to coarse texture similar to oak. Ring-porous anatomy creates a pronounced visual rhythm between earlywood and latewood that gives ash its bold, graphic character. When finished light, ash reads clean and contemporary. When stained, the open pores hold pigment and create a striking graphic effect.
Indoors, ash is used for tables, seating components, casework, bent parts, and any application where open grain character and shock resistance are priorities. Outdoor suitability: poor to moderate outdoor durability, since ash heartwood is rated as perishable and offers limited resistance to decay or insects. especially strong for steam-bent parts and cerused or limed finishes that emphasize the open grain, giving ash a graphic, contemporary look.
Performance and Strength
White ash produces good results with both hand and machine tools, and responds exceptionally well to steam bending. The wood glues, stains, and finishes well, making it one of the most versatile domestic hardwoods for furniture work. With a Janka hardness of 1,320 lbf and excellent shock resistance, ash has been the standard wood for baseball bats, tool handles, and other applications where toughness matters. Pore filling may be required when a flat, high-gloss surface is the goal, since the open pores can trap finish and create an uneven sheen.
| Property | Value | What It Means |
|---|---|---|
| Janka hardness | 1,320 lbf | Tough enough for heavy-use seating and tables |
| Specific gravity | 0.67 | Dense and rigid without feeling as heavy as white oak |
| Volumetric shrinkage | 13.3% | Moderate-to-high movement; acclimation and detailing matter |
| Shock resistance | Exceptional | One reason ash remains a favorite for seating and bent parts |
Where It Comes From
White ash grows across the eastern half of North America, from Nova Scotia to Florida and west to Minnesota and Texas. The species has been severely impacted by the emerald ash borer, an invasive beetle first detected in Michigan in 2002 that has killed hundreds of millions of ash trees across the United States and Canada. We source regionally through American hardwood suppliers who maintain consistent inventory.
Typical harvest age: White ash trees reach maturity at 40 to 60 years depending on site conditions. The emerald ash borer crisis has complicated long-term supply, but the species remains commercially available through regional hardwood markets.
Ash is a primary SENTIENT species. We source it regionally through American hardwood suppliers, with supply remaining consistent despite ongoing pressure from the emerald ash borer.
Cutting and Drying
Ash is sawn into plain, rift, and quartersawn boards depending on the grain expression desired. Plain-sawn boards show the most dramatic cathedral patterns, while rift and quartersawn cuts produce straighter, more linear grain. For furniture stock, we follow careful kiln-drying protocols to stabilize moisture content and minimize the moderate-to-high shrinkage this species is known for.
Recommended Finishes
- Stains: Strong grain definition. Follow penetration rules.
- Polyurethane: Durable indoor film.
- Water-based clear: Clean modern look.
- Grain fillers: Needed for smooth high-gloss over open pores.
Follow stain penetration and wipe-off requirements carefully, as the open pores of ash absorb stain aggressively. Grain fillers are needed when a smooth, high-gloss surface is the goal, since the pronounced pores trap finish and create an uneven sheen. Cerused and limed finishes are especially successful on ash because the pores hold contrasting pigment well, creating a striking two-tone effect. Water-based finishes keep the pale color clean, while oil-based options add warmth.
Browse all options in our finishes guide.
Care and Maintenance
Daily Care
- Dust with a soft, dry cloth or microfiber.
- For routine cleaning, use a slightly damp cloth, then wipe dry.
- Avoid abrasive sponges and harsh chemical cleaners, especially ammonia-based or silicone-containing products.
- Wipe spills promptly. Use coasters and trivets for heat and water protection.
Environment
- Maintain indoor humidity around 40 to 60 percent to reduce seasonal movement in solid wood.
- Avoid placing the piece near heating vents, fireplaces, or prolonged direct sunlight.
Maintenance Schedule
- Oil-finished surfaces: Refresh (clean, lightly abrade if needed, reapply oil) once or twice per year depending on use.
- Film-finished surfaces (water-based clear, polyurethane, lacquer): Clean gently. Refinish generally only after visible wear or damage.
Repair
- Oil systems: Minor scratches can often be blended by light sanding and re-oiling.
- Film systems: Small scratches may be spot-repaired. Deeper damage may require sanding and refinishing the affected area.
Outdoor Furniture
- Outdoor exposure increases stress on finishes.
- If maintaining original color: plan periodic UV-protective oiling (often annually). Otherwise, allow natural silvering and focus on cleaning and inspection.
- Avoid pressure washing. High-pressure water can erode surface fibers, increase splintering, and shorten finish life.
For more details, see our care and maintenance FAQ.
Sources
- USDA Wood Handbook, Chapter 2: Ash properties and shock resistance
Related Wood Species
White Oak
White oak is one of the most versatile hardwoods we work with and a staple in both residential and commercial projects.
Red Oak
Red oak is a bold, expressive hardwood with strong open-grained figure and one of the best stain-accepting properties of any domestic species.
Hickory
Hickory is one of the hardest and most shock-resistant domestic hardwoods available.
Hard Maple
Hard maple is one of the densest, hardest domestic hardwoods available and the species we reach for when the design calls for a lighter palette without sacrificing surface performance.
Beech
Beech is a heavy, hard domestic hardwood with fine uniform texture and exceptional steam-bending properties.
Browse All Wood Species
Compare 21 species by appearance, durability, and best applications.
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