Meranti / Red Lauan Wood (Shorea spp.): Properties, Density & Uses

What Meranti Is

Meranti is not a single wood but a broad commercial group drawn from the genus Shorea in the family Dipterocarpaceae — the dominant trees of the Southeast Asian lowland rainforest.1 Taken in its broad, traditional sense the genus spans well over a hundred species (Shorea sensu lato), and the timber trade sorts them not by botany but by the colour and density of the heartwood: dark red meranti, light red meranti, white meranti, yellow meranti and the dense balau group.2 "Red lauan" is simply the Philippine name for the dark red meranti group, drawn chiefly from species such as Shorea negrosensis, S. pauciflora and S. curtisii.2 In 2022 a number of the red-meranti species were reclassified by taxonomists into the segregate genus Rubroshorea, though the trade names are unchanged.7 The practical point for a buyer is the same as for pine: "meranti" on a spec sheet names a group, not a species, so density and durability depend on which colour group you are getting.

Where It Grows

Meranti is a wood of the wet tropics, native to the lowland dipterocarp forests of the Philippines, Malaysia — peninsular Malaysia, Sabah and Sarawak — and Indonesia across Borneo and Sumatra, with the range extending into neighbouring parts of Southeast Asia.3 Red lauan proper (S. negrosensis) is native to the Philippines and Malaysia, where it grows as a large emergent tree of the primary forest.4 These are the forests that supply the bulk of the world's tropical plywood, and India imports meranti veneer, logs and finished panels from this region rather than growing the species itself.

Appearance and Grain

Colour is exactly what the trade groups are named for. The heartwood ranges from a pale straw or pinkish tone in light red meranti to a deep reddish or purplish brown in the dark red group, usually with pale resin streaks running through it; the sapwood is lighter and clearly distinct.2 The grain is straight to interlocked and often produces a ribbon-stripe figure on quarter-sawn faces, while the texture is coarse with a low natural lustre. Meranti has no characteristic odour. It is that reddish-brown colour, not any botanical link, that earned the dark red group the misleading trade name "Philippine mahogany".

Weight, Density and Strength

Dark red meranti / red lauan is a genuine medium-density tropical hardwood: about 675 kg/m³ (42 lb/ft³) at 12% moisture content, with a specific gravity near 0.55 basic and 0.68 at 12% MC, a Janka hardness of roughly 3,570 N (800 lbf), a modulus of rupture around 87.7 MPa and an elastic modulus near 12.0 GPa.2 Across the wider meranti trade the numbers spread out considerably: light red meranti is much lighter at about 480 kg/m³ (Janka ~2,460 N),5 yellow meranti sits near 565 kg/m³, white meranti about 590 kg/m³ (Janka ~4,670 N),6 and the dense balau group climbs past 850 kg/m³. Set against okoume — the classic lightweight plywood species at roughly 430 kg/m³ — even the lightest meranti group outweighs it, and red lauan is markedly heavier and harder.2 That extra mass is what makes meranti plywood firmer and stronger for its thickness than an okoume panel.

Working, Gluing and Peeling

At its moderate density, meranti is generally easy to work with both hand and machine tools.2 The interlocked grain can tear out during planing, so a reduced cutting angle helps on quartered faces, but the wood glues, nails, screws, stains and finishes well. Most importantly for our trade, it peels readily and cleanly into veneer, giving a smooth, uniform face — the single reason it came to dominate tropical plywood.1 White meranti is the exception to the easy-working rule: it carries over 0.5% silica, which blunts cutters quickly, so carbide tooling is advised when that group is worked.6

Durability and Treatment

Durability is meranti's honest weak point and the reason it is a panel and joinery timber rather than an outdoor one. Dark red meranti / red lauan rates moderately durable to non-durable, while the light, white and yellow groups are generally non-durable, and all of them are susceptible to insect and borer attack.2 None is recommended for untreated ground contact or exposed exterior use. For any damp or outdoor application the material must be preservative-treated and well sealed; left to interior panelling, furniture, formwork and general plywood, meranti performs reliably.

Sustainability and Legality

Meranti is heavily traded and, in certified or legal form, remains widely available and moderately priced.1 The wider picture is more mixed: dipterocarp rainforests have been reduced by decades of logging and land-use change, and many Shorea species now carry IUCN threatened listings, several of them Critically Endangered. Red lauan's own status is genuinely contested — the global IUCN assessment is Least Concern (assessed 2019, published 2020), set against an older Critically Endangered listing and a national Vulnerable status from the Philippine authorities.4 The genus is not CITES-listed. Given that spread, the responsible course is to buy legally sourced and, where possible, FSC-certified material and to confirm chain-of-custody documentation.

How Cochin Wood Uses Meranti

Meranti is the global tropical-plywood workhorse, and that is exactly the role it plays for us: an economical, widely available face and core veneer for export-market panels — the tropical counterpart to the gurjan / keruing we use for the Indian market. Where gurjan is the dependable dark red dipterocarp of the domestic trade, meranti is its export-facing equivalent: a smooth-peeling Shorea veneer that is proven, priced right and easy to source in volume. At Cochin Wood we work meranti into our commercial plywood as a face and core option, matching the colour group and grade to the panel's job. Because most meranti is only moderately durable, we reserve it for interior and general-purpose builds and specify properly bonded, moisture-appropriate grades — stepping up to a treated or higher-durability species for our marine plywood where wet-service performance is the priority. Tell us the panel, thickness and destination and we will specify the right veneer build.