Burmese vs. Plantation Teak: A Sustainability Report
The teak market has split into two distinct supply chains: old-growth Burmese teak from Myanmar's natural forests, and plantation-grown Tectona grandis from India, Indonesia, Africa, and Central America. Architects and specifiers need to understand the physical differences, certification landscape, and ethical implications of each source.
The Botanical Context
Tectona grandis L.f. belongs to the Lamiaceae family — the same family as mint and lavender, though teak is a large deciduous tree reaching 30–40 meters in height. Native to India, Myanmar, Thailand, and Laos, it has been widely planted across the tropics since the 19th century. Burmese teak refers specifically to timber from Myanmar's natural forests, where slow growth and high mineral content produce the dense, oily heartwood that made teak famous for shipbuilding and outdoor joinery.
Plantation teak is the same species but grown under managed conditions with faster rotation cycles — typically 25–40 years versus 80–150 years for old-growth. Growth rate directly affects ring width, extractive deposition, and ultimate density. The botanical identity is identical; the wood properties are not.
Oil Content & Density: The Physical Divide
Burmese teak heartwood contains 1–4% natural oils (tectoquinone and related compounds) that confer water resistance, insect repellency, and dimensional stability. Plantation teak typically has lower extractive content — 0.5–1.5% — because faster growth dilutes the concentration. This translates to marginally higher moisture uptake and slightly reduced natural durability in plantation material.
Density follows the same pattern. Old-growth Burmese teak averages 650–720 kg/m³ when air-dried; plantation teak often falls in the 550–650 kg/m³ range. The Janka hardness of plantation teak can be 10–15% lower than Burmese. For interior applications, the difference is negligible. For marine or heavy exterior exposure, specifiers historically preferred Burmese.
Sustainability & Certification
Myanmar has imposed export bans on raw teak logs since 2014, and the 2021 coup complicated legal verification of Burmese supply chains. FSC and PEFC certification for Burmese teak is extremely limited. Plantation teak from India, Indonesia, Costa Rica, or Ghana can be FSC-certified, with traceability from forest to mill.
The ethical calculus is clear: plantation teak offers verifiable sustainability and legal documentation. Burmese teak, regardless of its superior oil content, carries supply-chain risk that many architects and procurement teams are no longer willing to accept. The industry has largely pivoted to specifying plantation-origin teak with FSC or equivalent certification.
Color & Figure
Burmese teak develops the characteristic golden-brown to dark brown heartwood with fine, straight grain. Plantation teak can exhibit wider growth rings, slightly paler color, and less uniform figure — though well-managed plantations in optimal climates (e.g., Java, Costa Rica) produce material that is visually and mechanically comparable for most applications.
For interior flooring, cabinetry, or furniture where aesthetics matter more than maximum weather resistance, plantation teak is a responsible and often indistinguishable choice. Specify FSC-certified plantation teak and document the chain of custody for client and regulatory review.
The Specifier's Checklist
When specifying teak: (1) Prefer plantation-origin with FSC or PEFC certification. (2) Request chain-of-custody documentation. (3) For exterior or marine use, specify higher-density plantation stock or accept that maintenance intervals may be shorter than with historic Burmese teak. (4) Avoid uncertified Burmese teak unless provenance can be legally verified — a rare scenario in current markets.