EHCI Learning & Certification
Teak technical profile
Teak (Tectona grandis): hardness, density, durability, movement, fastener and finishing guidance for exterior use.
All species
- Botanical name
- Tectona grandis
- Origin
- South and Southeast Asia; plantation grown worldwide
- Janka hardness
- 1,070 lbf
- Density (12% MC)
- 655 kg/m³
- Natural durability
- Very durable
- Appearance
- Golden brown, weathering to grey; high natural oil content
Movement and stability
Low; among the most dimensionally stable exterior hardwoods
Working properties
Machines well but silica content dulls tooling
Fastener guidance
Stainless steel or bronze; historically used in marine joinery
Finishing and weathering
Natural oils resist coatings; many owners leave it unfinished
Common applications
Marine deckingOutdoor furnitureCladdingWindow and door joinery
Cautions
- Plantation and old-growth stock differ in oil content and durability
- Confirm legal sourcing documentation
Related guides
Sources: 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). Values are typical and must be confirmed with supplier documentation.