Douglas Fir
Pseudotsuga menziesii • Softwood
Grain Pattern
Generally straight to slightly wavy grain with a medium to coarse texture; visible transition between light earlywood and dark latewood bands creates a distinct striped pattern in flat-sawn sections.
Color Description
Heartwood varies from yellowish-tan to reddish-brown; sapwood is a paler yellowish-white. The sample shows significant graying and weathering due to UV exposure, with visible dark fungal staining or moisture-induced discoloration.
Hardness Rating
660 lbf (Soft)
Durability Rating
Moderately Durable; offers moderate resistance to decay and rot but is susceptible to insect attack if not treated.
Common Uses
Heavy structural lumber, glue-laminated beams (glulam), flooring, veneers, joinery, and utility-grade construction like pallets or fencing.
Geographic Origin
Western North America (Pacific Northwest)
Market Value & Sustainability
Estimated Market Value
$1.50 - $4.00 per board foot (standard construction grade vs. clear vertical grain).
Wood Age Estimate
The wood appears to be from a contemporary utility timber, likely 5-20 years old, showing several seasons of outdoor exposure and oxidization (graying).
Sustainability Status
Least Concern (IUCN); widely available with FSC certification; considered highly sustainable due to fast growth and managed forestry.
Workability
Works well with both hand and machine tools, though it can be prone to splintering and 'tearout' on the latewood bands during planing. Glues and finishes well, but requires a sealer for even staining.
Notable Features
Distinctive resinous scent when freshly cut; exceptional strength-to-weight ratio; high resin content can occasionally foul sandpaper and blades.
Finish Recommendations
Penetrating oil or high-quality exterior stain for weathered samples; film-forming finishes like polyurethane are recommended for interior use to prevent splintering.
Identification Confidence
Medium-High; the prominent latewood/earlywood contrast, straight grain, and characteristic weathering patterns are highly indicative of Douglas Fir, though some Western Larch can appear similar.