Douglas Fir
Pseudotsuga menziesii • Softwood
Grain Pattern
Mostly straight with a prominent, coarse texture. The image shows a flat-sawn orientation with distinct, wide latewood bands (growth rings) and cathedral-like transitions. Some minor waviness is present suggesting natural structural variation.
Color Description
Heartwood typically ranges from light brown to reddish-brown; sapwood is yellowish-white. This sample shows significant oxidation (graying/silvering) and weathering, with visible moisture staining and dirt accumulation indicating the board has been exposed to the elements.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable; offers some natural resistance to rot and decay but is susceptible to insect attack if left untreated in ground contact.
Common Uses
Structural framing, heavy timbers, flooring, plywood, exterior siding, window frames, and boat building.
Geographic Origin
Western North America (Pacific Northwest, Rocky Mountains)
Market Value & Sustainability
Estimated Market Value
$3.00 - $6.00 per board foot depending on grade (Select vs. Construction grade).
Wood Age Estimate
Based on the surface oxidation, gray patina, and visible surface checking/weathering, this wood appears to be 5 to 15 years old since its last milling or installation if exposed outdoors.
Sustainability Status
Least Concern (IUCN); widely available with FSC certification. Generally considered a sustainable building material due to widespread replanting and fast growth cycles.
Workability
Generally works well with both hand and machine tools, though it can be prone to splintering and tearout along the grain. It holds nails and screws well and glues easily, but requires sanding to prevent raised grain.
Notable Features
Distinctive resinous, sweet odor when freshly cut. High strength-to-weight ratio compared to other softwoods. Contains natural resins that can bleed through finishes if not properly sealed.
Finish Recommendations
Exterior-grade oil-based stains or penetrating sealers are recommended for this level of weathering. If used indoors, polyurethane or shellac works well, though a sanding sealer may be needed to prevent blotchiness.
Identification Confidence
High. The prominent contrast between earlywood and latewood bands, the specific color of the reddish-brown heartwood showing through the gray patina, and the coarse texture are classic indicators of Douglas Fir.