Douglas Fir
Pseudotsuga menziesii • Softwood
Grain Pattern
Predominantly straight grain with distinct, abrupt transitions between light-colored earlywood and darker reddish-brown latewood. Visible flat-sawn cathedral patterns on the face and clear growth rings on the end grain.
Color Description
Heartwood is a warm orange-brown to reddish color; sapwood is a paler yellowish-white. The wood tends to darken and redden significantly with age and light exposure (UV patina). Low to moderate luster.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable; offers some resistance to decay and rot but is susceptible to insect attack. Fairly stable in outdoor conditions if treated.
Common Uses
Residential construction framing, heavy timbers, flooring, plywood, doors, window frames, and glue-laminated beams (glulams).
Geographic Origin
Western North America (Pacific Northwest, Rocky Mountains) and widely naturalized in Europe and New Zealand.
Market Value & Sustainability
Estimated Market Value
$3.00 - $6.00 per board foot depending on grade (Vertical Grain/Clear being higher).
Wood Age Estimate
The board appears to be several decades old (20-40 years) based on the deep oxidation and darkening of the wood fibers compared to fresh lumber, likely reclaimed from a residential renovation.
Sustainability Status
Least Concern (IUCN). Generally considered very sustainable; widely available as FSC certified and managed through extensive replanting programs.
Workability
Works well with machine tools but can be prone to splintering and tearout if tools are dull. Holds nails and screws well. Resin pockets can occasionally gum up blades and sandpaper.
Notable Features
Distinctive resinous scent when cut. High strength-to-weight ratio. Presence of 'pitch pockets' is common. Noted for its high tannin content which can cause staining if in contact with iron in wet conditions.
Finish Recommendations
Takes stains well, though a pre-stain conditioner is recommended to prevent blotching. Polyurethane or oil-based finishes are standard for flooring and structural applications.
Identification Confidence
High. The characteristic reddish-orange hue, the specific contrast between earlywood and latewood rings, and the visible tongue-and-groove milling consistent with fir flooring are diagnostic.