Port Orford Cedar — Density, Movement, Workability & Cost

Japanese temple builders, unable to source enough hinoki cypress for a restoration project, have specified Port Orford cedar (Chamaecyparis lawsoniana) as a substitute — a striking endorsement for a species most American woodworkers have never heard of, and a genuine sign of how closely its working properties match wood used in some of the world's most exacting traditional joinery.

The best strength-to-weight ratio of any North American softwood

At 29 lb/ft³ and 590 lbf on the Janka scale, Port Orford cedar isn't unusually dense or hard — its real distinction is strength relative to its weight, the best of any softwood grown on the continent. That property sent it into early aircraft construction and arrow shafts, two applications where every ounce matters and failure isn't an option, and it smells distinctly of ginger when worked, a genuinely pleasant departure from the more generic cedar scent most people expect.

Movement, and a boat-planking weight

Tangential shrinkage of 6.9% against a radial figure of 4.6% gives a 1.5 ratio, comfortably stable. An 8"-wide plank gives up about 0.11" (2.8mm) across its width on the swing from 12% moisture content down to a dry 6%; a narrower or wider plank runs through the wood movement calculator. Milled 1/2" thick and 6" wide for an 8-foot boat-planking run, the same stock weighs about 4.8 lb — the wood weight calculator covers other planking sizes.

Working it cleanly, and a resource under real threat

The wood bonds well and holds a scarf joint reliably, which is exactly why boatbuilders rely on it for long structural runs. Its fine, even texture takes a clear finish beautifully, and in traditional Japanese work it's often left entirely bare, allowed to weather naturally rather than sealed. The real limiting factor today is Phytophthora lateralis, a root disease that has severely restricted harvest across much of the species' range — availability is genuinely constrained in a way that has nothing to do with the wood's own working properties.

Durability, cost, and its niche but devoted markets

Port Orford cedar is durable, with good resistance to insects, consistent with its long history in exterior boat and building applications. It lands around $14 a board foot — this site's premium bracket — a price driven directly by the disease-restricted supply rather than any change in demand. Arrow shafts, boatbuilding, Japanese joinery, musical instrument soundboards, and venetian blinds round out its markets — the soundboard use draws on the same strength-to-weight property that made it valuable for aircraft.

The substitute relationship, both directions

Where genuine hinoki isn't available or affordable, Port Orford cedar is the accepted Western substitute in Japanese-style joinery, sharing enough working character — fine, even texture, good stability, a similar aromatic quality — that experienced joiners can move between the two without much adjustment. Where Port Orford cedar itself becomes unavailable because of disease-restricted supply, western redcedar is the more available, if working-wise quite different, regional alternative.

What people actually ask about Port Orford cedar

Are there disease-resistant Port Orford cedar strains being developed the way there are for American chestnut or sugar pine? Yes — forest researchers have identified naturally resistant trees and are working on propagation programs aimed at eventually restoring harvestable stands, though as with the other resistance-breeding efforts on this site's species list, commercially available resistant lumber isn't yet a mainstream market reality.

Is Port Orford cedar actually related to true cedar, or is "cedar" just a common name here? Like most North American "cedars," it's botanically a cypress (Chamaecyparis, in the same family as several other trees called cedar), not a true Cedrus — the common name reflects appearance and use rather than close botanical relation.

Does leaving Port Orford cedar bare outdoors risk spreading root disease to other trees the way handling infected material might? No — Phytophthora lateralis spreads through root contact, contaminated soil, and water movement in a living forest, not through a finished, cut board sitting above ground on a structure, so an unfinished outdoor piece poses no disease-transmission risk regardless of the species' own susceptibility as a standing tree.

Port Orford cedar's shrinkage figures come from Table 4-3 of the USDA Forest Products Laboratory's Wood Handbook (FPL-GTR-190, 2010); FPL's own Table 5-3b lists a slightly different 630 lbf Janka figure, while The Wood Database's more commonly cited 590 lbf is used on this page.