EHCI Learning & Certification
Exterior hardwood species reference
Technical properties, working characteristics, fastener and finishing guidance for the species most often specified outdoors.
| Species | Janka (lbf) | Density (kg/m³) | Durability | Typical uses |
|---|---|---|---|---|
| CumaruDipteryx odorata | 3,330 | 1,085 | Very durable | Decking, Cladding, Fencing |
| GarapaApuleia leiocarpa | 1,630 | 830 | Durable | Decking, Ceilings and soffits, Cladding |
| Genuine MahoganySwietenia macrophylla | 900 | 590 | Durable | Exterior doors and windows, Trim and millwork, Boat joinery |
| IpeHandroanthus spp. | 3,510 | 1,050 | Very durable | Decking, Boardwalks and docks, Rain-screen cladding |
| JatobaHymenaea courbaril | 2,690 | 910 | Moderately durable to durable | Covered porches, Exterior stairs and handrails, Ceilings |
| MassarandubaManilkara bidentata | 3,190 | 1,080 | Very durable | Decking in humid regions, Boardwalks, Heavy structural exterior timber |
| TeakTectona grandis | 1,070 | 655 | Very durable | Marine decking, Outdoor furniture, Cladding |
| TigerwoodAstronium graveolens | 2,170 | 905 | Durable to very durable | Decking, Cladding accents, Ceilings |
About these values
Figures are typical published values at roughly 12% moisture content and vary by origin, growth conditions and grade. Always confirm with the supplier's data sheet and applicable span tables before specifying.
- USDA Forest Products Laboratory, Wood Handbook (FPL-GTR-282)
- International Wood Products Association species guidance
- Published supplier technical data sheets (values vary by origin and grade)