Bamboo plywood

Overview

Bamboo plywood is cross-banded panel stock: strips of bamboo are glued into thin layers, with alternate layers turned at right angles for stability. The face is a clean vertical-grain stripe that can be left natural or carbonized to amber. Woodworkers pick it for cabinet doors, boxes and desk panels when they want a hard, uniform, modern surface without the cost of solid hardwood.

Pros

• Hard surface: the Wood Database gives bamboo 1,410 to 1,610 lbf; a dealer lists 1,650. Sources disagree, so treat it as a range.
• Cross-banded layers should move less than a single wide solid-wood board.
• Takes stain, glue and finish well (Wood Database).
• Uniform stripe, no knots or sapwood.

Cons

• Expensive in small-board form: a dealer's 3-ply boards work out to roughly $16-18 per sq ft. Full 4x8 sheet pricing was not verified.
• Silica (0.5 to 4.0% in the outer layers, per the Wood Database) dulls steel quickly; use carbide.
• Inconsistency between products is a recognised weakness (Wood Database).
• Glue type varies; most bamboo flooring uses urea-formaldehyde (Wikipedia). Not for outdoor use: perishable and prone to rot and insect attack.

Variants and subspecies

• Natural: pale straw.
• Carbonized: amber to brown from heat; hardness drops (Wikipedia).
• Veneer-faced panels: a dealer sells 4x8 paper-backed bamboo veneer rolls at $130 in light and amber tones, a veneer, not a structural panel.
• For flooring-grade board see Laminated bamboo (vertical and horizontal); for the very hard pressed form see Strand-woven bamboo.

Working and finishing

Cut with sharp carbide blades and a fine-tooth blade; tape the cut line to limit tear-out (Wood Database). Bits and blades dull faster than on birch ply. Edges show layer lines; leave them as a design feature or band them. The Wood Database notes bamboo glues and finishes well, so standard wood glues and clear finishes work. Predrill before screwing near edges.

Staining and finishing colour

The Wood Database says bamboo stains and finishes well, but with a hard skin test first. Carbonized stock is already darkened; you can go darker, not lighter. Clear coats keep the stripe visible.

Sustainability and handling

Bamboo is not CITES or IUCN listed (Wood Database). Maturity is quoted as two to five years depending on source; Teragren harvests moso at 5.5 to 6 years, so harvest age is a fair question to ask. Processed imports are energy-intensive (Wood Database). We have not verified an embodied-carbon figure or the formaldehyde class of this particular product, so ask for documentation. Wood Database reports skin irritation only rarely.

Popular projects

Cabinet doors and boxes, drawer fronts, desk and shelf panels, and small furniture where a flat, hard, striped face is wanted.

Buying notes

One US dealer sells 3-ply cross-banded vertical-grain boards in 1/2 in and 3/4 in thicknesses, in 9-1/4 or 11-1/2 in widths and 22, 42 or 72 in lengths. Check core layup, thickness tolerance, glue and formaldehyde certification before buying, and compare per-sq-ft price rather than per-board.