Douglas Fir
Pseudotsuga menziesii • Softwood
Grain Pattern
The end grain shown features clearly defined, medium to wide growth rings. The grain is generally straight with a distinct transition between light-colored earlywood and darker, denser latewood typical of conifers.
Color Description
Heartwood is a light yellowish-brown to reddish-orange. Sapwood is a pale yellowish-white. The sample shows some graying on the outer surface (sapstain) and tends to darken/redden significantly when exposed to UV light over time.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable; heartwood is resistant to decay but can be susceptible to insect attack. Outer sapwood has low resistance to rot.
Common Uses
Structural framing, heavy construction, plywood, flooring, window frames, and exterior millwork.
Geographic Origin
Native to Western North America, from British Columbia down to California and New Mexico.
Market Value & Sustainability
Estimated Market Value
$1.50 - $4.00 per board foot depending on grade and region.
Wood Age Estimate
Freshly cut green log, likely under 6 months old based on the moisture visible in the pith crack and lack of deep silver weathering. The tree itself was approximately 15-20 years old based on ring count.
Sustainability Status
Not listed in CITES and classified as Least Concern by IUCN. Widely available as FSC certified and sustainably managed timber.
Workability
Generally works well with both hand and machine tools, though it can have a tendency to split when nailed or screwed near edges. It takes glue and finishes well, though latewood can be resistant to stain.
Notable Features
Features a distinct, resinous, citrus-like scent when freshly cut. It possesses an excellent strength-to-weight ratio, making it a premier building material.
Finish Recommendations
Resin-sealing primer is recommended for painting. For natural looks, penetrating oils or polyurethane provide good protection. Sanding must be thorough as the transition between soft and hard grain can lead to uneven surfaces.
Identification Confidence
High; the distinct transition between earlywood and latewood rings, the reddish-tan color of the heartwood, and the circular pith characteristics are classic indicators of Douglas Fir.