SENTIENT ╲ Materials ╲ Woods ╲ Ipe

Ipe

Ipe is one of the hardest, densest, and most decay-resistant woods commercially available. At roughly three times the hardness of teak and eight times the hardness of redwood, it occupies a category of its own. We use ipe for outdoor furniture where performance must be absolute: extreme weather, heavy foot traffic, marine-adjacent environments, or any situation where the wood will face conditions that would destroy lesser species. It is demanding to machine, but the result is a surface rated for 40 or more years of untreated outdoor service.

Characteristics

Tabebuia spp. (lapacho group) (Bignoniaceae), a Hardwood (angiosperm). Also known as Ipe, lapacho, guayacan.

Ipe heartwood ranges from dark brown to olive brown, often displaying lighter or darker striping across the surface. The texture is fine to medium with minimal knots and a homogeneous appearance that reads dense and refined once properly surfaced. Sapwood is sharply differentiated, a pale yellowish color that is typically excluded from furniture applications. Left unfinished outdoors, ipe silvers to a medium grey patina similar to teak, though the surface remains hard and intact beneath the color change.

Indoors, ipe is used for Possible for heavy-duty applications. Outdoor suitability: our recommendation for severe exterior exposure and long service life. Selected for durability first: dense, refined hardwood feel.

Performance and Strength

Ipe weighs approximately 70 pounds per cubic foot dried, making it so dense it will not float in water. The Janka hardness rating is 3,490 lbf (some sources report up to 3,680 at 12% moisture content), which makes ipe roughly three times harder than white oak and among the hardest commercially available furniture woods in the world. The U.S. Forest Products Laboratory rates ipe heartwood as very durable, suitable for use class 5 (direct soil and water contact). It resists wood rot, mold, fungi, decay, termites, and marine borers. Ipe also carries a Class A fire rating, the highest classification. Machining is difficult due to the extreme density and silica content: carbide tooling is required, and pre-drilling is necessary for fasteners.

Where It Comes From

Ipe comprises about 20 species within the genus Tabebuia, native to Central and South America, with the primary commercial supply coming from Brazil. Unlike teak, ipe has not been widely established in plantation cultivation, so most commercial supply still comes from managed natural forests. This makes responsible sourcing more critical, and we work with suppliers who can document legal and sustainable harvesting practices.

Typical harvest age: Ipe is a slow-growing species in natural tropical forests, which means it does not follow the plantation rotation cycles typical of teak or eucalyptus. Harvest volumes are managed through government concession programs in producing countries, and certification (FSC or equivalent) is available for projects that require it.

Sourced through responsible suppliers with documented legal harvesting. Because ipe comes from natural forests rather than plantations, we take sourcing decisions seriously and can provide FSC-certified material for projects that require it.

Cutting and Drying

Ipe is typically sawn into dimensional boards for decking, outdoor furniture components, and structural applications. The extreme density makes it resistant to conventional tooling: carbide blades are standard, and pre-drilling is necessary for any fastener. The wood dries slowly, and thick stock requires a carefully managed kiln schedule to avoid checking and internal stress. Film finishes may struggle with adhesion on this density unless a proven system specifically rated for tropical hardwoods is used.

Recommended Finishes

• Exterior oils: When maintaining color matters. Otherwise allow natural weathering.
• Water-based (tested systems): Minimal film unless verified for ipe density.

Ipe can be left completely unfinished outdoors, and with proper installation it will last 40 or more years in that state. If maintaining the original brown color is the goal, a UV-protective exterior oil can be applied periodically, though the maintenance schedule will be more demanding than with teak due to ipe’s density (the oil sits on the surface rather than penetrating deeply). Before applying any coating, the surface should be cleaned with a solvent to remove extractives that can interfere with adhesion. Conventional film finishes are generally not recommended unless the specific product has been tested and verified for tropical hardwood density.

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: Ipe density and decay resistance
• IUCN Red List: Ipe sourcing sensitivity

Related Wood Species

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