One of the hardest woods in the world. Bornean ironwood barely absorbs water and resists rot for decades, even buried or in direct ground contact — which is why we specify it for foundations and structural posts that carry a home's full weight for its lifetime.
Exceptionally dense cell structure keeps moisture out, resisting the rot and insect damage that limit most timbers in ground contact.
Performs reliably as foundational posts and substructure for far longer than conventional timber, reducing long-term replacement risk.
Its extreme hardness makes it better suited to structural roles than fine furniture detailing, where lighter hardwoods are easier to finish.
Ironwood carries the structural load in our prefab homes — the parts of the building that are hardest to access or replace later, and where durability matters more than anything else.
Ironwood barely absorbs water and resists rot and insect damage for decades, even in direct ground contact — making it the most durable option we use for foundational posts and substructure where replacement later would be impractical.
Its extreme density makes it harder to mill and fasten than lighter hardwoods, which is why we reserve it for structural roles where its durability matters most, rather than fine furniture detailing.
Ulin (Eusideroxylon zwageri) is native to Borneo and other parts of Indonesia and Malaysia. We source it through established regional suppliers — ask our team for sourcing details relevant to your project.