Material reference · specification & sourcing
Ipe Wood: Identity, Properties, Decking & Selection
Ipe, pronounced “ee-pay,” is a dense tropical hardwood trade group used in exterior decking and other demanding applications. Specify the product and assembly, not just the common name.
By Lumberama · Updated November 11, 2026 · Editorial standards
Selection at a glance
| Item | Meaning | What to verify |
|---|---|---|
| Ipe / ipê | Tropical hardwood trade group | Confirm botanical and shipment identity |
| Brazilian walnut | Trade name | Not black walnut |
| Pregrooved | Machined edges | Match compatible clips |
| T&G or shiplap | Closed-joint profiles | Assembly-specific exposure and support |
Names and identity
Ipe appears in older technical literature under Tabebuia species; botanical classification also uses Handroanthus for relevant traded species. Brazilian walnut is a trade name and does not make Ipe the same wood as black walnut. Ironwood is used for many unrelated woods and is not a sufficient purchasing specification.
If you searched for “ipw wood,” you may mean Ipe. There is no separate IPW wood species identified by this guide. Confirm the intended species with the supplier before ordering or applying installation advice.
Hardness is not a complete performance specification
High indentation hardness helps explain wear and machining demands. It does not establish a joist span, slip resistance, fire classification or a guaranteed service life. Any fire-performance claim must be tied to the tested product, thickness, assembly and applicable documentation.
Heartwood durability does not eliminate the need for drainage, ventilation and inspection. Sapwood, checking, fastener performance and the surrounding structure can affect the installed result. Use project-specific evidence rather than a blanket promise that the material cannot rot or split.
Profiles and actual dimensions
Common buying choices include square-edge, pregrooved, tongue-and-groove and shiplap profiles. These are not interchangeable. A groove must match the approved clip system; a closed-joint profile needs an assembly designed for that use and exposure.
Specify finished thickness and face width, coverage width where applicable, acceptable lengths, exposed faces, grade definition and moisture condition. Confirm the manufacturer’s tolerances and the face on which any permitted milling defects may occur. Nominal sizing alone is insufficient for a takeoff.
Machining, bonding and fasteners
Dense stock benefits from sharp tooling, supported cuts and a planned predrilling sequence appropriate to the fastener and product. Ask the hardware manufacturer for compatibility with the wood, board thickness and exposure. Hidden systems and face fastening require their own installation details.
Bonding Ipe can be challenging. USDA research on ambient-curing exterior adhesives shows why selecting an adhesive and preparing trial joints is more reliable than assuming any wood glue will perform outdoors. Follow the adhesive manufacturer’s specific process and verify the joint in the intended application.
Color, maintenance and sourcing
A natural gray surface and a maintained brown appearance require different finish decisions. A penetrating finish can alter appearance and maintenance needs; it does not replace construction detailing. Clean and inspect with the product’s instructions, avoiding a universal pressure-washer setting.
Ask for traceable species and harvest-origin documentation, the applicable grade definition, actual dimensions and a delivered quote. Do not infer shipment-specific certification from a generic website badge. Compare the total usable quantity after length selection and cutting rather than price per linear foot alone.
Build your supplier specification
Enter what is known. Unspecified details stay marked for confirmation. Nothing is submitted until you review and send the sourcing request.
Review specification text
Material: Ipe Wood Application and exposure: To confirm Actual dimensions and lengths: To confirm Grade, faces and selection: To confirm Profile / milling / core: To confirm Moisture or bond classification: To confirm Quantity and unit: To confirm Delivery location, date and access: To confirm
Sources and verification
Reference guidance describes material selection, not a product inspection or engineering approval. Confirm the supplied product, current manufacturer instructions and project requirements. No stock, price, fire rating or service-life guarantee is implied.