Merbau

Merbau (Intsia bijuga) is a Southeast Asian and Pacific Island hardwood closely related to African afzelia — the two genera sit in the same tribe and share similar anatomy and mechanical properties, though merbau typically runs darker and shows yellowish mineral deposits in its pores.

Working Properties

Merbau shrugs off both rot and insect attack, which is exactly why it dominates outdoor decking. The tradeoff shows up at the saw: natural resins gum up and dull teeth fast, though it glues and finishes cleanly once you've fought your way through cutting it to size.

Sustainability

Merbau is listed as Vulnerable on the IUCN Red List, having lost over 20% of its population across three generations — worth checking sourcing before you buy, not after.

Typical Uses

Decking (by far its dominant use), flooring, and outdoor furniture.