Douglas Fir
Pseudotsuga menziesii • Softwood
Grain Pattern
Principally straight grain with prominent, tight latewood bands. This sample displays flat-sawn to rift-sawn orientation with a tight, even growth ring pattern and a characteristic decorative knot.
Color Description
Heartwood is typically a light reddish-brown to orange-brown. Earlywood is pale yellow/white, while latewood is much darker reddish-brown. It tends to darken to a deeper, silvery-grey or orange-patina with UV exposure.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable; generally resistant to rot and decay, though it can be susceptible to insect attack if not treated. Good resistance to weathering in exterior structural applications.
Common Uses
Structural framing, exterior posts, heavy timbers, flooring, veneers, and furniture. A primary species for residential construction in North America.
Geographic Origin
Western North America, ranging from the Rocky Mountains to the Pacific Coast (from British Columbia to Mexico).
Market Value & Sustainability
Estimated Market Value
$3.00 - $6.00 per board foot (standard dimensional/select structural grade).
Wood Age Estimate
3-10 years (construction age). The wood shows signs of recent architectural use with typical sun-bleaching but minimal checking or deep weathering, suggesting a modern residential post.
Sustainability Status
Not listed on CITES Appendices or the IUCN Red List; widely available and frequently FSC-certified as it is a major timber crop.
Workability
Easy to work with both hand and machine tools. It glues and finishes well, though it can be prone to splintering or 'shelling' of the latewood rings if tools are dull. High resin content may occasionally gum up saw blades.
Notable Features
Distinctive resinous scent when cut. Notable for its high strength-to-weight ratio among softwoods. Transition between earlywood and latewood is very abrupt, providing high visual contrast.
Finish Recommendations
Exterior-grade oils or semi-transparent stains are recommended for outdoor posts to preserve the natural grain. If used indoors, polyurethane or lacquer are effective.
Identification Confidence
High; the combination of the reddish-brown latewood bands, the specific abrupt transition in growth rings, the knot structure, and the common application as a structural porch post are quintessential markers of Douglas Fir.