Douglas Fir
Pseudotsuga menziesii • Softwood (gymnosperm)
Grain Pattern
Straight with prominent growth rings; flat-sawn face shows typical V-shaped cathedral patterns. End grain shows distinct latewood/earlywood transition characteristic of conifers.
Color Description
Naturally light brown to reddish-brown heartwood with yellowish-white sapwood; however, this sample exhibits a weathered gray patina due to oxidation and dirt accumulation. Luster is currently low due to surface oxidation.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable, but susceptible to insect attack. Heartwood is moderately resistant to decay but will rot if in permanent ground contact without treatment.
Common Uses
Structural framing, dimensional lumber, plywood, flooring, heavy timber construction, and exterior cladding.
Geographic Origin
Western North America (Pacific Northwest, Rocky Mountains)
Market Value & Sustainability
Estimated Market Value
$2.00 - $4.00 per board foot for standard rough-cut framing; higher for clear vertical grain (CVG) grades.
Wood Age Estimate
The board itself appears to be several decades old (20-40 years) based on the deep gray oxidation and the density of the growth rings suggestive of older-growth or more mature timber.
Sustainability Status
Least Concern (IUCN); widely available with FSC certification; not listed on CITES appendices. Highly sustainable due to replanting programs.
Workability
Generally works well with both hand and machine tools, though it can be prone to splintering and tearout during planing. It holds nails and screws well but can split if driven too close to edges without pre-drilling.
Notable Features
Distinctive resinous scent when freshly cut. Notable for its high strength-to-weight ratio among softwoods. Some individuals may experience mild respiratory irritation from the dust.
Finish Recommendations
Requires cleaning and sanding to remove gray oxidation. Recommended finishes include exterior-grade oils or stains if used outside, or polyurethane and lacquer for interior architectural use.
Identification Confidence
High. The prominent growth rings, texture of the end grain, and typical 'cathedral' flat-sawn grain pattern on the face are definitive indicators of Douglas Fir dimensional lumber.